fidzu : Operating Systems

Raymond Chen published a blog post about how a crappy uninstaller on Windows caused a mysterious spike in the number of Explorer (Windows' graphical shell) crashes. It turns out the buggy uninstaller caused repeated crashes in the 32bit version of Explorer on 64bit systems, and - hold on a minute. The how many bits on the what now? The 32-bit version of Explorer exists for backward compatibility with 32-bit programs. This is not the copy of Explorer that is handling your taskbar or desktop or File Explorer windows. So if the 32-bit Explorer is running on a 64-bit system, it's because some other program is using it to do some dirty work. ↫ Raymond Chen at The Old New Thing So I had no idea that 64bit Windows included a copy of the 32bit Explorer for backwards compatibility. It obviously makes sense, but I just never stopped to think about it. This made me wonder though if you could go nuts and do something really dumb: could you somehow trick 64bit Windows into running this 32bit copy of Explorer as its shell? You'd be running 32bit Explorer on 64bit Windows using the 32bit WoW64 binaries where you just pulled the 32bit Explorer binary from, which seems like a really nonsensical thing to do. Since there's no longer any 32bit builds of Windows 11, you also can't just copy over the 32bit Explorer from a 32bit Windows 11 build and achieve the same goal that way, so you'd really have to go digging around in WoW64 to get 32bit versions. I guess the answer to this question depends on just how complete this copy of 32bit Explorer really is, and if Windows has any defenses or triggers in place to prevent someone from doing something this uselessly stupid. Of course, there's no practical reason to do any of this and it makes very little sense, but it might be a fun hacking project. Most likely the Windows experts among you are wondering what kind of utterly deranged new designer drug I'm on, but I was always told that sometimes, the dumbest questions can lead to the most interesting answers, so here we are.

24 Apr 2026 11:07pm GMT

Not too long ago I had a need and an opportunity to re-acquaint myself with the mechanism used for software emulation of the 8087 FPU on 8086/8088 machines. ↫ Michal Necasek Look, when a Michal Necasek article starts out like this, you know you're in for a learnin' ol' time. The 8087 was a floating-point coprocessor for the 8086 and 8088 processors, since back in those early days, processors did not include an integrated floating-point unit. It wouldn't be until the release of the 486DX, in 1989, that Intel would integrate an FPU inside the processor itself, negating the need for a separate chip and socket. Interestingly enough, Intel also released a cut-down version of the 486 with the FPU removed, the 486SX, for which an optional external FPU did exist.

24 Apr 2026 10:42pm GMT

Sebastian Wick has a great explanation of why opening files - programmatically - is a lot more complex and fraught with dangers than you might think it is. This issue was relevant for Wick as he is one of the lead developers of Flatpak, for which a number of security issues have recently been discovered, and it just so happens that many of these issues dealt with this very topic. The biggest security issue found was a complete sandbox escape, originating from the fact that flatpak run, the command-line tool to start a Flatpak application, accepted path strings, since flatpak run is assumed to be run by a trusted user. The problem lay in a D-Bus service sandboxed applications could use to create subsandboxes, and this service was built around, you guessed it, flatpak run. The issues in question, including this complete sandbox escape, have been addressed and fixed, but they highlight exactly the dangers that can come from opening files. This subsandboxing approach in Flatpak is built on assumptions from fifteen years ago, and times have changed since then. If you're a programmer who deals with opening files, you might want to take a look at your own code to see if similar issues exist.

24 Apr 2026 8:24pm GMT

In that reading "AI" is a machine for the creation of epistemic injustice and the replacement of truth with what a tech elite wants it to be in order to control the population. This is a Fascist project that not so subtly aligns with Fascism's totalitarian will to power and control as well as its reliance in replacing reasoning and debate with belief in power and the leader. ↫ Jürgen Geute The purpose of a system is what it does, and what "AI" does is stunt users' own abilities and development and concentrate power and wealth even further in the hands of a very small privileged few - a privileged few who consistently espouse fascist ideology and promote and implement fascist ideas. Jürgen Geute lays it out in much more detail backed by solid references and concrete examples, but the conclusion is clear. And uncomfortable to many, as such conclusions always are.

24 Apr 2026 8:13pm GMT

I'm not sure many OSNews readers still use Ubuntu as their operating system of choice, and from the release announcement of today's Ubuntu 26.04 it's clear why that's the case. Resolute Raccoon builds on the resilience-focused improvements introduced in interim releases, with TPM-backed full-disk encryption, improved support for application permission prompting, Livepatch updates for Arm-based servers, and Rust-based utilities for enhanced memory safety. This release brings native support for industry-leading AI/ML toolkits like NVIDIA CUDA and AMD ROCm, making Ubuntu 26.04 LTS the ideal platform for AI development and production workloads. ↫ Canonical press release It's obvious where Canonical's focus lies with Ubuntu, and us desktop people who don't like "AI" aren't it. On top of all the "AI" nonsense, this new version comes with all the latest versions of the various open source components that make up a Linux distribution, as well as a slew of Rust-based replacements for core CLI tools, like sudo-rs, uutils coreutils, and more. All the derivative release of Ubuntu, like Kubuntu, Xubuntu, and others, will also be updated over the coming days. If you're already running any of these, updating won't be a surprise to you.

23 Apr 2026 7:33pm GMT

You can find beauty in the oddest of places. WSL9x runs a modern Linux kernel (6.19 at time of writing) cooperatively inside the Windows 9x kernel, enabling users to take advantage of the full suite of capabilities of both operating systems at the same time, including paging, memory protection, and pre-emptive scheduling. Run all your favourite applications side by side - no rebooting required! ↫ Hailey Somerville Yes, this is exactly what it sounds like. Hailey Somerville basically recreated the first version of WSL - or coLinux, for the old people among us - but instead of running on Windows NT, it runs on Windows 9x. A VxD driver loads a patched Linux kernel using DOS interrupts, and this Linux kernel calls Windows 9x kernel APIs instead of POSIX APIs. A small DOS client application then allows the Linux kernel to use MS-DOS prompts as TTYs. This is a great oversimplification, but it does get the general gist across. Anyway, the end result is that you can use a modern Linux kernel and Windows 9x at the same time, without virtualising or dual-booting. This might be one of the greatest hacks in recent times, and I find it oddly beautiful in its user-facing simplicity.

22 Apr 2026 8:47pm GMT

Despite years of apparent stagnation and reported mass layoffs, it seems the Solaris team at Oracle has found somewhat of a renewed stride recently. Both branches of Solaris - the one for paying customers (SRU) and the free one for enthusiasts (CBE) - are receiving regular updates again, and there seems to be a more concerted effort to let the outside world know, too. We've got another update to the SRU branch this week which brings updates to a few important open source packages, like Django, Firefox, Thunderbird, Golang, and others, to address security issues. In addition, this update marks as a change in the release cadence for the commercial branch of Solaris. From here on out, there will be two "Critical Patch Updates" per quarter to address security issues, followed by a Support Repository Update containing new features and larger changes.

22 Apr 2026 8:33pm GMT

I need to post about this because if I don't, people will get mad. Cook will continue on as Apple CEO through the summer, with Ternus set to join Apple's Board of Directors and take over as CEO on September 1, 2026. Cook is going to transition to chairman of the board at Apple, and he will "assist with certain aspects of the company, including engaging with policymakers around the world." ↫ Juli Clover at MacRumors This concludes OSNews' coverage of Keeping Up With the Yacht Class, but rest assured, every other tech site will be milking this for weeks to come. You will still be worrying about how to pay for your next tank of gas.

20 Apr 2026 10:04pm GMT

Have you ever tried clicking the back button in your browser, only to realise the website you're on somehow doesn't allow that? Out of all the millions of annoyances on the web, Google has decided to finally address this one: they're going to punish the search rankings of websites that use this back button hijacking. Pages that are engaging in back button hijacking may be subject to manual spam actions or automated demotions, which can impact the site's performance in Google Search results. To give site owners time to make any needed changes, we're publishing this policy two months in advance of enforcement on June 15, 2026. ↫ Google Search Central It's always uncomfortable when Google unilaterally takes actions such as these, since rarely do Google's interests align with our own as users. This is in such rare case, though, and I can't wait to see this insipid practice relegated to the dustbin of history.

20 Apr 2026 9:37pm GMT

LXQt, the desktop environment which is effectively to KDE what Xfce is to GNOME, has released version 2.4.0. Quite a few changes in this release are further refinements and fixes related to LXQt's adoption of Wayland, but there are also a ton of small fixes, improvements, and small new features that have nothing to do with Wayland at all. There are also a few layout cleanups to make some dialogs and panels look a bit tidier and nicer. Note that LXQt supports both X11 and Wayland equally, and the choice of which to use is up to you. If you're using LXQt, you've already seen a few of these changes in point releases of its components, so not everything listed in the release notes might be news to you.

20 Apr 2026 7:55pm GMT

The title of my article on age verification in Linux and other operating systems had a "for now" added for a reason, and here we are, with two members of the US Congress introducing a bill to add age verification to operating systems. The text of the proposed bill was only published today, and it's incredibly vague and wishy-washy, without any clear definitions and ton of open-ended questions. Still, if passed, the bill would require actual age verification, instead of mere voluntary age reporting that current state-level bills cover. It also seems to eschew the concept of age brackets, giving application developers access to specific ages of users instead. It's a vague mess of a bill that no sane person would ever want passed, but alas, sanity is a rare commodity these days, especially in US Congress. It's introduced by Democrat Josh Gottheimer and Republican Elise M. Stefanik, so it has that bipartisan sheen to it, which could increase its odds of going anywhere. At the same time, though, US Congress is about as useful as a box of matches during a house fire, so for all we know, this will end up going nowhere as its members focus on doing absolutely nothing to reign in the flock of coked-up headless chickens passing for an executive branch over there. If something like this gets passed, every US-based operating system - which includes most open source operating systems and Linux distributions - will probably fall in line when faced with massive fines and legal pressure. This isn't going to be pretty.

16 Apr 2026 8:07pm GMT

Tribblix, the Illumos distribution focused on giving you a classic UNIX-style experience, doesn't only support x86. It also has a branch for SPARC, which tends to run behind its x86 counterpart a little bit and has a few other limitations related to the fact SPARC is effectively no longer being developed. The Tribblix SPARC branch has been updated, and now roughly matches the latest x86 release from a few weeks ago. The graphical libraries libtiff and OpenEXR have been updated, retaining the old shared library versions for now. OpenSSL is now from the 3.5 series with the 3.0 api by default. Bind is now from the 9.20 series. OpenSSH is now 10.2, and you may get a Post-Quantum Cryptography warning if connecting to older SSH servers. 'zap install' now installs dependencies by default. 'zap create-user' will now restrict new home directories to mode 0700 by default; use the -M flag to choose different permissions. Support for UFS quotas has been removed. ↫ Tribblix release notes There's no new ISO yet, so to get to this new m34 release for SPARC you're going to have to install from an older ISO and update from there.

15 Apr 2026 8:18pm GMT

Another Haiku monthly activity report, but this time around, there's actually a big ticket item. Haiku has been in a pretty solid and stable state for a while now, so the activity reports have been dominated by fairly small, obscure changes, but during March a major milestone was reached for the ARM64 port. smrobtzz contributed the bulk of the work, including fixes for building on macOS on ARM64, drivers for the Apple S5L UART, fixes to the kernel base address, clearing the frame pointer before entering the kernel, mapping physical memory correctly, the basics for userland, and more. SED4906 contributed some fixes to the bootloader page mapping, and runtime_loader's page-size checks. Combined, these changes allow the ARM64 port to get to the desktop in QEMU. There's a forum thread, complete with screenshots, for anyone interested in following along. ↫ waddlesplash While it's only in QEMU, this is still a major achievement and paves the way for more people to work on the ARM64 port, possibly increasing its health. There's tons of smaller changes and fixes all over the place, too, as usual, and the team mentions beta 6 isn't quite ready yet, still. Don't let that stop you from just downloading the latest nightly, though - Haiku is mature enough to use it.

15 Apr 2026 3:10pm GMT

The editor in chief of this blog was born in 2004. She uses the 1997 window manager, Enlightenment E16, daily. In this article, I describe the process of fixing a show-stopping, rare bug that dates back to 2006 in the codebase. Surprisingly, the issue has roots in a faulty implementation of Newton's algorithm. ↫ Kamila Szewczyk I'm not going to pretend to understand any of this, but I know you people do. Enjoy.

15 Apr 2026 2:00pm GMT

Modern laptops promise a kind of magic. Shut the lid or press the sleep button, toss it in a backpack, and hours, days, or weeks later, it should wake up as if nothing happened with little to no battery drain. This sounds like a fairly trivial operation - y'know, you're literally just asking for the computer to do nothing - but in that quiet moment when the fans whir down, the screen turns dark, and your reflection stares back at you, your computer and all its little components are actually hard at work doing their bedtime routine. ↫ Aymeric Wibo at the FreeBSD Foundation A look at how suspend and resume works in practice, from the perspective of FreeBSD. Considering FreeBSD's laptop focus in recent times, not an unimportant subject.

15 Apr 2026 1:51pm GMT

A few weeks ago, Microsoft made some concrete promises about fixing and improving Windows, and among them was removing useless "AI" integrations. Applications like Notepad, Snipping Tool, and others would see their "AI" features removed. Well, it turns out Microsoft employs a very fringe definition of the concept. Microsoft seems to have stripped away mentions of the "Copilot" brand in the Windows Insider version of the Notepad app. The Copilot button in the toolbar is gone, and instead, you'll find a writing icon which will present you AI-powered writing assistance, such as rewrite, summarize, tone modification, format configuration, and more. Additionally, "AI features" in Notepad settings has been renamed to "Advanced features" and it allows users to toggle off AI capabilities within the app. ↫ Usama Jawad at Neowin If the recent changes to Notepad are any indication, it seems Microsoft is, actually, not at all going to "reducing unnecessary Copilot entry points", as they worded it, but is merely just going to rename these features so they aren't so ostentatiously present. At least, that seems to be the plan for Notepad, and we'll have to see if they have the same plans for the other applications. I mean, they have to push "AI" or look like fools. I just don't understand how a company like Microsoft can be so utterly terrible at communication. While I personally would want all "AI" features yeeted straight from Windows, I'm sure a ton of people are just fine with the features being less in-your-face and stuffed inside a normal menu alongside all the other normal features. They could've just been honest about their intentions, and it would've been so much better. Like virtually every other technology company, Microsoft just seems incapable of not lying.

14 Apr 2026 9:28pm GMT