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Your monthly updates post is here! This month we have a couple of releases for our developer tools, plus plenty of improvements to Bluetooth, as well as a hardware enablement boost from Ubuntu and plenty to talk about in Early Access. Let’s dive in! System Settings The previously mentioned redesign of Bluetooth Settings has arrived! This redesign not only brings a bit more visual separation between paired devices and nearby devices, but also improves the keyboard navigation and screen reader experience. Plus, you can now double click rows to activate them. We resolved an issue where sometimes devices would be duplicated in the list and fixed issues when a pairing request requires entering passcodes—like with some keyboards. You’ll now also see fewer unnamed devices when discovering, enabling and disabling Bluetooth on devices that have been hardware locked should now work reliably, and to top it all off performance when listing lots of devices has also been improved. Bluetooth settings has a new design Leonhard and Ryo fixed a couple of issues with sidebar selections when navigating directly to a setting from search. Ryo fixed an issue where Sharing Settings lost its window controls when a network was not connected. And there’s now an action to jump directly to the System Updates page from the context menu in the Dock or Applications Menu or via search. Code Working with Git projects continues to get better thanks to Jeremy! There’s now a new feature to clone git repositories directly from inside Code via the projects menu in the sidebar. The item for opening project folders has moved there as well, so managing your open projects now happens all in one place no matter where they come from. You can now clone Git projects in Code He also fixed an issue with blank tooltips appearing in empty sidebar folders, a crash when deleting selected text while using the “Highlight Selection” plugin, and a freeze when editing lists with the “Markdown” plugin. Plus, the Symbols sidebar now shows a loading spinner when searching symbols takes longer than usual, and filters have been fixed for C symbols. Terminal Terminal will now warn about pasted commands that include options to skip confirmation like -y, --interactive=never, and --force. Plus we now make sure to show all found warnings about a pasted command, not just the first one found. For example, if a command like sudo apt update && sudo apt install -y fuse is pasted, we will warn about use of admin privileges, multiple commands, and that it skips confirmations, not just that it uses admin privileges. Terminal warns about more potentially dangerous commands Corentin fixed an issue where long commands could resize windows. Jeremy fixed an issue where tab labels didn’t properly update when using screen or ssh. And he made sure we properly close tabs when using the exit command. And More A few small bug fixes for our Window Manager: Corentin resolved a potential crasher, Leo improved dock hide animations, and Leonhard fixed an issue with revealing the panel over fullscreen apps. A new Hardware Enablement stack has arrived thanks to Ubuntu! This includes Linux 6.14 and Mesa 25 which brings support for newer hardware as well as some big performance gains and potential battery life improvements. OMG! Ubuntu! breaks down all the nerdy details here Get These Updates As always, pop open System Settings → System on elementary OS 8 and hit “Update All” to get these updates plus your regular security, bug fix, and translation updates. Or set up automatic updates and get a notification when updates are ready to install! Early Access Maps Last month, Ryo made the last release of Atlas on AppCenter because we’ll soon be shipping it by default in elementary OS as Maps! As part of our work to improve the experience on computers you take with you—like notebooks and tablets—we’ve been working on features that use your location, and shipping a Maps app is part of that work. An in-development version of the new Maps Our hope with Maps is to improve support for mapping and location features in our platform libraries and to improve experiences in other apps like Tasks and Calendar as well as 3rd party apps in AppCenter. We’ve also already made a tiny improvement to the wider Freedesktop ecosystem by documenting a standard location icon used across desktops and in Portals. We’re really looking forward to getting your feedback and learning how we can improve experiences for apps that use your location in elementary OS. Window Manager & Dock First up is some new eye candy. We’ve heard requests for transparency and blur over the years and I’m happy to report we’re now experimenting with some new effects in shell elements like the alt + tab Window Switcher. We want to make sure to carefully balance shiny effects with performance and legibility, so be sure to send in your feedback. We’re also on track to apply some blur behind the Dock soon, so watch out for that. Blur effects have landed in the window switcher and are coming to the Dock Speaking of the Dock, you may have noticed that it’s now sticking around when in Multitasking View! We’ve replaced the old workspace switcher and you can now launch apps from the Dock directly into different workspaces to quickly get things set up exactly how you like. We’ve also merged in a new feature to monitor background apps that use the cross-platform Background Portal. Here you can not only manage background apps, but also see an explanation of what exactly they’re doing while running. With these features, we’re seeing years of design and development work come together: an improved way to multitask on elementary OS whether you use a mouse at your desktop, multitouch gestures on your laptop or tablet, or rely on keyboard shortcuts to get the job done. I’m extremely proud of what the team has done here and look forward from hearing more from you about it! Background apps now show in the Dock And that’s not all. Building on the previously mentioned Gesture Controller, the new Touchpad backend for multitouch gestures has also landed. This replaces Touchégg in the Secure Session as the way to track multitouch gestures, fixes bugs, and enables new features like two-dimensional swiping between workspaces and the full Multitasking View. So if you are a fan of gestures on your notebook, we’d love for you to try it out and report back before we ship it for everyone. Hardware Support Last but not least, we’re now building Universal EFI install images for ARM64 processors. This means instead of building unique ARM images for every hardware platform, we can build a single universal image for platforms like Pinebook, Raspberry Pi, and M-series Macs. These builds are still experimental and come with a few bugs, but we’d love folks to give them a spin in a virtual machine or on a spare computer and report back. If everything looks good, we may be able to offer stable ARM64 downloads starting with OS 8.1 later this year. Sponsors I want to give special thanks this month to Ryan Prior for his extremely generous one-time sponsorship! Ryan noted that this sponsorship was dedicated to the hard work of Renato who has been translating elementary OS into Brazilian Portuguese. Thanks a ton for your work Renato! At the moment we’re at 22% of our monthly funding goal and 332 Sponsors on GitHub! Shoutouts to everyone helping us reach our goals here. Your monthly sponsorship funds development and makes sure we have the resources we need to give you the best version of elementary OS we can! Monthly release candidate builds and daily Early Access builds are available to GitHub Sponsors from any tier! Beware that Early Access builds are not considered stable and you will encounter fresh issues when you run them. We’d really appreciate reporting any problems you encounter with the Feedback app or directly on GitHub.
Questionable puns aside, it’s Pride Month and we’re excited to celebrate by bringing you these updates hand-made by real LGBTQIA+ community members from around the world!—and possibly some straight cis folks too. This rainbow of releases includes some important accessibility updates, tons of bug fixes, and of course a few new features. Window Manager & Dock Another absolutely massive release of our window manager is out that fixes about 20 reported issues and a brand new Gesture Controller thanks to Leonhard and Leo. You can now Swipe up in Multitasking View to close windows, app titles in Multitasking View are now always shown—making them accessible for touch screen setups—and screenshots taken with a keyboard shortcut will send a notification that you can use to view it in Files, just to name a few headlining features. If you want to read the full release notes, Good Luck Babe they’re quite long. A new release of our Dock is also out which brings back a couple of old Plank features: showing multiple dots for apps with multiple running windows and cycling through app windows when you hold a drag-n-drop over its icon. Plus you can now open context menus with a long-press. And there’s a number of bug fixes including things related to hide modes and memory usage. Thanks again to Leo and Leonhard for their hard work here. System Settings Leonhard fixed a crash when setting custom hotcorner commands and we now only show the Applications Menu hotcorner action in its corresponding panel corner—that’s top-left for folks reading left-to-right and top-right for folks reading right-to-left. Plus there’s a new option to enable hotcorners even while an app is fullscreened. As a follow up to last month’s fixes, choosing light or dark mode in System Settings will now properly snooze your schedule instead of disabling it all together—a great convenience for those of us who suffer from eye strain or headaches and need to occasionally reach for that dark mode during the day. Plus, the Reduce Motion setting now covers a whole new range of animations—perfect for folks who get motion sick or find animations distracting. Leonardo tackled a couple of crashes in Display settings including one when mirroring, and another when new displays are attached while System Settings is open. We fixed an issue that prevented CalDAV accounts from connecting in Online Accounts settings. And Alain snuck in a few design tweaks, fixing button alignments etc. And More Thanks to feedback from Aaron, Notifications and the Shortcut Overlay both got releases that add screen reader support. Corentin addressed some Flatpak sandbox issues with an updated Apparmor Profile—especially notable if you’d had trouble with Steam. We now use BeaconDB as our location services provider. And thanks to Ryo we’re now shipping the latest version of GNOME Web which brings improved performance and web compatibility as well as a redesigned bookmarks sidebar. Get These Updates As always, pop open System Settings → System on elementary OS 8 and hit “Update All” to get these updates plus your regular security, bug fix, and translation updates. Or set up automatic updates and get a notification when updates are ready to install! Community Pride I want to take a little space to say that our community is for everyone regardless of gender or sexual identity. We’ve long been made up of lots of different kinds of folks and I’m really proud of that. Open Source software should never be a space that is restricted to a narrow set of identities. In a time where many companies are withdrawing their support for the LGBTQIA+ community, I think it’s incredibly important that we make a strong statement against hate and don’t give in to the pressure to erase queer people in some sad attempt to be “apolitical”. Free Software has always been political, and its politics are freedom and inclusivity and so are ours. Sponsors At the moment we’re at 23% of our monthly funding goal and 336 Sponsors on GitHub! Shoutouts to everyone helping us reach our goals here. Your monthly sponsorship funds development and makes sure we have the resources we need to give you the best version of elementary OS we can! Monthly release candidate builds and daily Early Access builds are available to GitHub Sponsors from any tier! Beware that Early Access builds are not considered stable and you will encounter fresh issues when you run them. We’d really appreciate reporting any problems you encounter with the Feedback app or directly on GitHub.
In mid-March we released a big bug fix update—elementary OS 8.0.1—and since then we’ve been hard at work on even more bug fixes and some new exciting features that I’m excited to share with you today! Read ahead to find out what we’ve released recently and what you can help us test in Early Access. Quick Settings Quick Settings has a new “Prevent Sleep” toggle Leo added a new “Prevent Sleep” toggle. This is useful when you’re giving a presentation or have a long-running background task where you want to temporarily avoid letting the computer go to sleep on its normal schedule. We also fixed a bug where the “Dark Mode” toggle would cancel the dark mode schedule when used. We now have proper schedule snoozing, so when you manually toggle Dark Mode on or off while using a timed or sunset-to-sunrise schedule, your schedule will resume on the next schedule change instead of being canceled completely. Vishal also fixed an issue that caused some apps to report being improperly closed on system shutdown or restart and on the lock screen we now show the “Suspend” button rather than the “Lock” button. System Settings Locale settings has a fresh layout thanks to Alain with its options aligned more cleanly and improved links to additional settings. Locale Settings has a more responsive design We’ve also added the phrase “about this device” as a search term for the System page and improved interface copy when a restart is required to finish installing updates based on your feedback. Plus, Stanisław improved stylus detection in Wacom settings preventing a crash when no stylus is found. AppCenter We now show a small label next to the download button for apps which contain in-app purchases. This is especially useful for easily identifying free-to-play games or alt stores like Steam or Heroic Games Launcher. AppCenter now shows when apps have in-app purchases Plus, we now reload app icons on-the-fly as their data is processed, thanks to Italo. That means you’ll no longer get occasionally stuck with an AppCenter which shows missing images for app’s who have taken a bit longer than usual to load. Get These Updates As always, pop open System Settings → System on elementary OS 8 and hit “Update All” to get these updates plus your regular security, bug fix, and translation updates. Or set up automatic updates and get a notification when updates are ready to install! Early Access Our development focus recently has been on some of the bigger features that will likely land for either elementary OS 8.1 or 9. We’ve got a new app, big changes to the design of our desktop itself, a whole lot of under-the-hood cleanup, and the return of some key system services thanks to a new open source project. Monitor We’re now shipping a System Monitor app by default By popular demand—and thanks to the hard work of Stanisław—we have a new system monitor app called “Monitor” shipping in Early Access. Monitor provides usage information for your processor, GPU, memory, storage, network, and currently running processes. You can optionally see system information in the panel with Monitor You can also optionally get a ton of glanceable information shown in the panel. There’s currently a lot of work happening to port Monitor to GTK4 and improve its functionality under the Secure Session, so make sure to report any issues you find! Multitasking The Dock is getting a workspace switcher Probably the biggest change to the Pantheon shell since its early inception, the Dock is getting a new workspace switcher! The workspace switcher works in a familiar way to the one you may have seen in the Multitasking View: Your currently open workspaces are represented as tiles with the icons of apps running on them; You can select a workspace to switch to it; You can drag-and-drop workspaces to rearrange them; And you can use the “+” button to create a new blank workspace. One new trick however is that selecting the workspace you’re already on will launch Multitasking View. The new workspace switcher makes it so much more accessible to multitask with just the mouse and get an overview of your workflows without having to first enter the Multitasking View. We’re really excited to hear what people think about it! You can close apps from Multitasking View by swiping up Another very satisfying feature for folks using touch input, you can now swipe up windows in the Multitasking View to close them. This is a really familiar gesture for those of us with Android and iOS devices and feels really natural for managing a big stack of windows without having to aim for a small “x” button. GTK4 Porting We’ve recently landed the port of Tasks to GTK4. So far that comes with a few fixes to tighten up its design, with much more possible in the future. Please make sure to help us test it thoroughly for any regressions! Tasks has a slightly tightened up design We’re also making great progress on porting the panel to GTK4. So far we have branches in review for Nightlight, Bluetooth, Datetime, and Network indicators. Power, Keyboard, and Quick Settings indicators all have in-progress branches. That leaves just Applications, Sound, and Notifications. So far these ports don’t come with major feature changes, but they do involve lots of cleaning up and modernizing of these code bases and in some cases fixing bugs! When the port is finished, we should see immediate performance gains and we’ll have a much better foundation for future releases. You can follow along with our progress porting everything to GTK4 in this GitHub Project. And More When you take a screenshot using keyboard shortcuts or by secondary-clicking an app’s window handle, we now send a notification letting you know that it was succesful and where to find the resulting image. Plus there’s a handy button that opens Files with your screenshot pre-selected. We’re also testing beaconDB as a replacement for Mozilla Location Services (MLS). If you’re not aware, we relied on MLS in previous versions of elementary OS to provide location information for devices that don’t have a GPS radio. Unfortunately Mozilla discontinued the service last June and we’ve been left without a replacement until now. Without these services, not only did maps and weather apps cease to function, but system features like automatic timezone detection and features that rely on sunset and sunrise times no longer work properly. beaconDB offers a drop-in replacement for MLS that uses Wireless networks, bluetooth devices, and cell towers to provide location data when requested. All of its data is crowd-sourced and opt-in and several distributions are now defaulting to using it as their location services data provider. I’ve set up a small sponsorship from elementary on Liberapay to support the project. If you can help support beaconDB either by sponsoring or providing stumbler data, I’d highly encourage you to do so! Sponsors At the moment we’re at 23% of our monthly funding goal and 336 Sponsors on GitHub! Shoutouts to everyone helping us reach our goals here. Your monthly sponsorship funds development and makes sure we have the resources we need to give you the best version of elementary OS we can! Monthly release candidate builds and daily Early Access builds are available to GitHub Sponsors from any tier! Beware that Early Access builds are not considered stable and you will encounter fresh issues when you run them. We’d really appreciate reporting any problems you encounter with the Feedback app or directly on GitHub.
It’s been a little over 100 days since elementary OS 8 was released, and we’re proud to announce another round of updates, including a fresh new download. We’ve been hard at work this winter addressing issues that you reported and we’ve added a couple new creature comforts along the way. This bug fix release also includes the latest Ubuntu LTS Hardware Enablement Kernel, so it’s worth checking out if you downloaded OS 8.0 and it disagreed with your hardware. AppCenter We now properly use dark mode brand colors and dark mode screenshots thanks to Italo. Plus, when developers provide screenshots for multiple desktop environments, we now prefer the ones intended for our desktop environment, Pantheon. We support the new <Developer> Appstream tag, thanks to Juan. And we now support the contribute URL type. AppCenter now shows dark mode screenshots when available Italo also fixed some issues with release notes overflowing out of their container, and we slightly redesigned the release notes window in the Updates page. He also addressed a few other issues in the Updates page that could occur while things were being updated or refreshed and made sure AppCenter recovers gracefully when its cache is emptied. Release notes dialogs have been slightly redesigned Search is also much faster thanks to Leonhard. And for developers, Ryo fixed loading your local metadata for testing with the --load-local terminal option. Files & Terminal Jeremy fixed another half-dozen reported issues in Files, including an issue that prevented entering file paths in search mode, an issue that prevented scrolling after deleting files, and an issue where files would disappear when dropped on an unmounted drive. The New file submenu now respects the hierarchy of folders in Templates. We now also respect the admin:// uri protocol for opening a path as an administrator, and Files is now styled correctly when run as administrator. He also fixed an issue where Terminal tabs took multiple clicks to focus, and an issue where keyboard shortcuts stopped working for tabs that had been dragged into their own new window. Plus, file paths and names are also now properly quoted when drag-and-dropped from Files into Terminal. System Settings System Settings now allows configuring its notifications in System Settings → Notications. So you can turn off bubbles if you don’t want to receive notifications about updates, for example. We’ll also no longer automatically download updates when on metered connections and send a notification instead, thanks to Leonhard. Plus we no longer check for updates in Demo Mode. Updates now show their download size and you can see progress towards our monthly sponsorship goal In System, Vishal made sure we show how large an update will be before downloading it and that we skip held-back packages—such as phased or staged updates—when preparing the updates bundle so that it will more reliably succeed. Alain added a progress bar while downloading. And Ryo made sure the last refresh time is more accurate when no updates are available. Alain also added a new progress bar that represents how close we are to meeting our monthly sponsorship goal. In Applications, you can now disallow notifications access. This is especially useful for apps which use the notifications portal, but don’t properly report their notification usage and can’t be controlled in the Notifications settings page. Reign in apps that don’t appear in Notifications settings In Network there are two new settings: whether a network should be automatically connected to when available and whether to reduce background data usage when connected to that network. Disable autoconnect or mark a network as metered We also updated the pointer icons in Mouse & Touchpad settings and the checkmarks in Locale settings will now respect your chosen accent color. Plus settings pages with sidebars now remember the width you adjusted them to, thanks to Alain. Installation & Onboarding David fixed a crash with certain partitioning schemes in the Installer’s custom install view. And the Encryption step was redesigned to fit on a single page, solving an issue with confusing navigation. Plus, onboarding will now always stay centered on the screen, even when resized. Panel & Quick Settings Ilya fixed an issue with the panel height when using the Classic session and HiDPI displays. The app context menu in the Applications menu now shows a “Keep in Dock” checkbox, just like in the Dock thanks to Stella. In the Power menu, we now show the device model if available, and avoid erroneously showing an empty battery icon thanks to Alain. In the Sound menu, Dmitry fixed loading album art from certain apps like Google Chrome, and we fixed an issue where player icons could become too large. See who else is logged in and quickly switch accounts from Quick Settings In Quick settings, Leonhard fixed an issue with performing updates while shutting down. And Alain added a new page where you can see which other people are logged in and quickly switch between accounts. Dock Leo added a bit more spacing between launchers and their running indicators, and fixed an issue where larger icons could be clipped at the peak of their bounce animation. Apps who don’t notify on startup will no longer bounce in the dock indefinitely, thanks to Leonhard. We fixed an issue where the dock would still receive click events while hidden in the Classic session. Plus the dock now has an opaque style when “Panel Translucency” is turned off in System Settings → Desktop → Dock & Panel. Window Manager We have another huge release of our window manager thanks to Leonhard and Leo. This release fixes five potential crashes, over a dozen reported issues, fixes related to both the Classic and Secure sessions, issues related to HiDPI, and more, plus performance improvements. It’s worth reading the full release notes on GitHub if you have been waiting for the fix for a specific issue. And More OS 8.0.1 includes the latest long-term support Hardware Enablement stack from Ubuntu, including Linux 6.11. This brings improved performance for AMD processors, support for Intel “Lunar Lake” processors, and filesystem performance improvements in some cases. Plus support for certain webcams, USB network devices, joysticks, and more. Leo fixed an issue where connecting Bluetooth devices could cause the Lock Screen to freeze. You can now close the captive network assistant with the keyboard shortcut Ctrl + Q, thanks to Stanisław. And Alain fixed copying screenshots to the clipboard. We fixed an issue where wired network connections could fail to connect due to a change in Ubuntu. We’re pursuing this issue upstream and working on a way to ship the fix as an update, but for now fixing this issue requires either manual intervention through Terminal or a reinstall. We also now pre-install an AppArmor profile that fixes a number of Flatpak-related issues like not being to install certain runtime updates or apps not launching in the guest session or Demo mode. Special thanks to Uncle Tallest for investigating this issue and helping folks in our Discord who ran into it. And of course this release comes with a ton of translation updates! Special thanks to our hard-working internationalization community and especially Ryo who fixed a number of issues with things that couldn’t be localized properly in the previous release. Get elementary OS 8.0.1 elementary OS 8.0.1 is available as a pay-what-you-can purchase at elementary.io today. Localized direct downloads and a torrent magnet link are provided. OS 8 FAQ Download elementary OS 8.0.1 Sponsors have been able to download OS 8.0.1 release candidates since last week, so if getting things before anyone else is important to you, consider sponsoring us on GitHub
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I always had a diffuse idea of why people are spending so much time and money on amateur radio. Once I got my license and started to amass radios myself, it became more clear.
What does it mean when someone writes that a programming language is “strongly typed”? I’ve known for many years that “strongly typed” is a poorly-defined term. Recently I was prompted on Lobsters to explain why it’s hard to understand what someone means when they use the phrase. I came up with more than five meanings! how strong? The various meanings of “strongly typed” are not clearly yes-or-no. Some developers like to argue that these kinds of integrity checks must be completely perfect or else they are entirely worthless. Charitably (it took me a while to think of a polite way to phrase this), that betrays a lack of engineering maturity. Software engineers, like any engineers, have to create working systems from imperfect materials. To do so, we must understand what guarantees we can rely on, where our mistakes can be caught early, where we need to establish processes to catch mistakes, how we can control the consequences of our mistakes, and how to remediate when somethng breaks because of a mistake that wasn’t caught. strong how? So, what are the ways that a programming language can be strongly or weakly typed? In what ways are real programming languages “mid”? Statically typed as opposed to dynamically typed? Many languages have a mixture of the two, such as run time polymorphism in OO languages (e.g. Java), or gradual type systems for dynamic languages (e.g. TypeScript). Sound static type system? It’s common for static type systems to be deliberately unsound, such as covariant subtyping in arrays or functions (Java, again). Gradual type systems migh have gaping holes for usability reasons (TypeScript, again). And some type systems might be unsound due to bugs. (There are a few of these in Rust.) Unsoundness isn’t a disaster, if a programmer won’t cause it without being aware of the risk. For example: in Lean you can write “sorry” as a kind of “to do” annotation that deliberately breaks soundness; and Idris 2 has type-in-type so it accepts Girard’s paradox. Type safe at run time? Most languages have facilities for deliberately bypassing type safety, with an “unsafe” library module or “unsafe” language features, or things that are harder to spot. It can be more or less difficult to break type safety in ways that the programmer or language designer did not intend. JavaScript and Lua are very safe, treating type safety failures as security vulnerabilities. Java and Rust have controlled unsafety. In C everything is unsafe. Fewer weird implicit coercions? There isn’t a total order here: for instance, C has implicit bool/int coercions, Rust does not; Rust has implicit deref, C does not. There’s a huge range in how much coercions are a convenience or a source of bugs. For example, the PHP and JavaScript == operators are made entirely of WAT, but at least you can use === instead. How fancy is the type system? To what degree can you model properties of your program as types? Is it convenient to parse, not validate? Is the Curry-Howard correspondance something you can put into practice? Or is it only capable of describing the physical layout of data? There are probably other meanings, e.g. I have seen “strongly typed” used to mean that runtime representations are abstract (you can’t see the underlying bytes); or in the past it sometimes meant a language with a heavy type annotation burden (as a mischaracterization of static type checking). how to type So, when you write (with your keyboard) the phrase “strongly typed”, delete it, and come up with a more precise description of what you really mean. The desiderata above are partly overlapping, sometimes partly orthogonal. Some of them you might care about, some of them not. But please try to communicate where you draw the line and how fuzzy your line is.
(Last week's newsletter took too long and I'm way behind on Logic for Programmers revisions so short one this time.1) In classical logic, two operators F/G are duals if F(x) = !G(!x). Three examples: x || y is the same as !(!x && !y). <>P ("P is possibly true") is the same as ![]!P ("not P isn't definitely true"). some x in set: P(x) is the same as !(all x in set: !P(x)). (1) is just a version of De Morgan's Law, which we regularly use to simplify boolean expressions. (2) is important in modal logic but has niche applications in software engineering, mostly in how it powers various formal methods.2 The real interesting one is (3), the "quantifier duals". We use lots of software tools to either find a value satisfying P or check that all values satisfy P. And by duality, any tool that does one can do the other, by seeing if it fails to find/check !P. Some examples in the wild: Z3 is used to solve mathematical constraints, like "find x, where f(x) >= 0. If I want to prove a property like "f is always positive", I ask z3 to solve "find x, where !(f(x) >= 0), and see if that is unsatisfiable. This use case powers a LOT of theorem provers and formal verification tooling. Property testing checks that all inputs to a code block satisfy a property. I've used it to generate complex inputs with certain properties by checking that all inputs don't satisfy the property and reading out the test failure. Model checkers check that all behaviors of a specification satisfy a property, so we can find a behavior that reaches a goal state G by checking that all states are !G. Here's TLA+ solving a puzzle this way.3 Planners find behaviors that reach a goal state, so we can check if all behaviors satisfy a property P by asking it to reach goal state !P. The problem "find the shortest traveling salesman route" can be broken into some route: distance(route) = n and all route: !(distance(route) < n). Then a route finder can find the first, and then convert the second into a some and fail to find it, proving n is optimal. Even cooler to me is when a tool does both finding and checking, but gives them different "meanings". In SQL, some x: P(x) is true if we can query for P(x) and get a nonempty response, while all x: P(x) is true if all records satisfy the P(x) constraint. Most SQL databases allow for complex queries but not complex constraints! You got UNIQUE, NOT NULL, REFERENCES, which are fixed predicates, and CHECK, which is one-record only.4 Oh, and you got database triggers, which can run arbitrary queries and throw exceptions. So if you really need to enforce a complex constraint P(x, y, z), you put in a database trigger that queries some x, y, z: !P(x, y, z) and throws an exception if it finds any results. That all works because of quantifier duality! See here for an example of this in practice. Duals more broadly "Dual" doesn't have a strict meaning in math, it's more of a vibe thing where all of the "duals" are kinda similar in meaning but don't strictly follow all of the same rules. Usually things X and Y are duals if there is some transform F where X = F(Y) and Y = F(X), but not always. Maybe the category theorists have a formal definition that covers all of the different uses. Usually duals switch properties of things, too: an example showing some x: P(x) becomes a counterexample of all x: !P(x). Under this definition, I think the dual of a list l could be reverse(l). The first element of l becomes the last element of reverse(l), the last becomes the first, etc. A more interesting case is the dual of a K -> set(V) map is the V -> set(K) map. IE the dual of lived_in_city = {alice: {paris}, bob: {detroit}, charlie: {detroit, paris}} is city_lived_in_by = {paris: {alice, charlie}, detroit: {bob, charlie}}. This preserves the property that x in map[y] <=> y in dual[x]. And after writing this I just realized this is partial retread of a newsletter I wrote a couple months ago. But only a partial retread! ↩ Specifically "linear temporal logics" are modal logics, so "eventually P ("P is true in at least one state of each behavior") is the same as saying !always !P ("not P isn't true in all states of all behaviors"). This is the basis of liveness checking. ↩ I don't know for sure, but my best guess is that Antithesis does something similar when their fuzzer beats videogames. They're doing fuzzing, not model checking, but they have the same purpose check that complex state spaces don't have bugs. Making the bug "we can't reach the end screen" can make a fuzzer output a complete end-to-end run of the game. Obvs a lot more complicated than that but that's the general idea at least. ↩ For CHECK to constraint multiple records you would need to use a subquery. Core SQL does not support subqueries in check. It is an optional database "feature outside of core SQL" (F671), which Postgres does not support. ↩
Omarchy 2.0 was released on Linux's 34th birthday as a gift to perhaps the greatest open-source project the world has ever known. Not only does Linux run 95% of all servers on the web, billions of devices as an embedded OS, but it also turns out to be an incredible desktop environment! It's crazy that it took me more than thirty years to realize this, but while I spent time in Apple's walled garden, the free software alternative simply grew better, stronger, and faster. The Linux of 2025 is not the Linux of the 90s or the 00s or even the 10s. It's shockingly more polished, capable, and beautiful. It's been an absolute honor to celebrate Linux with the making of Omarchy, the new Linux distribution that I've spent the last few months building on top of Arch and Hyprland. What began as a post-install script has turned into a full-blown ISO, dedicated package repository, and flourishing community of thousands of enthusiasts all collaborating on making it better. It's been improving rapidly with over twenty releases since the premiere in late June, but this Version 2.0 update is the biggest one yet. If you've been curious about giving Linux a try, you're not afraid of an operating system that asks you to level up and learn a little, and you want to see what a totally different computing experience can look and feel like, I invite you to give it a go. Here's a full tour of Omarchy 2.0.
In 2020, Apple released the M1 with a custom GPU. We got to work reverse-engineering the hardware and porting Linux. Today, you can run Linux on a range of M1 and M2 Macs, with almost all hardware working: wireless, audio, and full graphics acceleration. Our story begins in December 2020, when Hector Martin kicked off Asahi Linux. I was working for Collabora working on Panfrost, the open source Mesa3D driver for Arm Mali GPUs. Hector put out a public call for guidance from upstream open source maintainers, and I bit. I just intended to give some quick pointers. Instead, I bought myself a Christmas present and got to work. In between my university coursework and Collabora work, I poked at the shader instruction set. One thing led to another. Within a few weeks, I drew a triangle. In 3D graphics, once you can draw a triangle, you can do anything. Pretty soon, I started work on a shader compiler. After my final exams that semester, I took a few days off from Collabora to bring up an OpenGL driver capable of spinning gears with my new compiler. Over the next year, I kept reverse-engineering and improving the driver until it could run 3D games on macOS. Meanwhile, Asahi Lina wrote a kernel driver for the Apple GPU. My userspace OpenGL driver ran on macOS, leaving her kernel driver as the missing piece for an open source graphics stack. In December 2022, we shipped graphics acceleration in Asahi Linux. In January 2023, I started my final semester in my Computer Science program at the University of Toronto. For years I juggled my courses with my part-time job and my hobby driver. I faced the same question as my peers: what will I do after graduation? Maybe Panfrost? I started reverse-engineering of the Mali Midgard GPU back in 2017, when I was still in high school. That led to an internship at Collabora in 2019 once I graduated, turning into my job throughout four years of university. During that time, Panfrost grew from a kid’s pet project based on blackbox reverse-engineering, to a professional driver engineered by a team with Arm’s backing and hardware documentation. I did what I set out to do, and the project succeeded beyond my dreams. It was time to move on. What did I want to do next? Finish what I started with the M1. Ship a great driver. Bring full, conformant OpenGL drivers to the M1. Apple’s drivers are not conformant, but we should strive for the industry standard. Bring full, conformant Vulkan to Apple platforms, disproving the myth that Vulkan isn’t suitable for Apple hardware. Bring Proton gaming to Asahi Linux. Thanks to Valve’s work for the Steam Deck, Windows games can run better on Linux than even on Windows. Why not reap those benefits on the M1? Panfrost was my challenge until we “won”. My next challenge? Gaming on Linux on M1. Once I finished my coursework, I started full-time on gaming on Linux. Within a month, we shipped OpenGL 3.1 on Asahi Linux. A few weeks later, we passed official conformance for OpenGL ES 3.1. That put us at feature parity with Panfrost. I wanted to go further. OpenGL (ES) 3.2 requires geometry shaders, a legacy feature not supported by either Arm or Apple hardware. The proprietary OpenGL drivers emulate geometry shaders with compute, but there was no open source prior art to borrow. Even though multiple Mesa drivers need geometry/tessellation emulation, nobody did the work to get there. My early progress on OpenGL was fast thanks to the mature common code in Mesa. It was time to pay it forward. Over the rest of the year, I implemented geometry/tessellation shader emulation. And also the rest of the owl. In January 2024, I passed conformance for the full OpenGL 4.6 specification, finishing up OpenGL. Vulkan wasn’t too bad, either. I polished the OpenGL driver for a few months, but once I started typing a Vulkan driver, I passed 1.3 conformance in a few weeks. What remained was wiring up the geometry/tessellation emulation to my shiny new Vulkan driver, since those are required for Direct3D. Et voilà, Proton games. Along the way, Karol Herbst passed OpenCL 3.0 conformance on the M1, running my compiler atop his “rusticl” frontend. Meanwhile, when the Vulkan 1.4 specification was published, we were ready and shipped a conformant implementation on the same day. After that, I implemented sparse texture support, unlocking Direct3D 12 via Proton. …Now what? Ship a great driver? Check. Conformant OpenGL 4.6, OpenGL ES 3.2, and OpenCL 3.0? Check. Conformant Vulkan 1.4? Check. Proton gaming? Check. That’s a wrap. We’ve succeeded beyond my dreams. The challenges I chased, I have tackled. The drivers are fully upstream in Mesa. Performance isn’t too bad. With the Vulkan on Apple myth busted, conformant Vulkan is now coming to macOS via LunarG’s KosmicKrisp project building on my work. Satisfied, I am now stepping away from the Apple ecosystem. My friends in the Asahi Linux orbit will carry the torch from here. As for me? Onto the next challenge!