March 2025 - wlug - list.wlug.org.nz

Linux Kernel Might Get Smarter Reboots
by Peter Reutemann 01 Apr '25

01 Apr '25

'Something interesting recently emerged on the Linux kernel front—a new patch series titled “Live Update Orchestrator,” authored by Google’s engineer Pasha Tatashin and built on top of an earlier set of patches commonly referred to as the KHO v5 patch series. It aims to enable smooth kernel updates—referred to as “Live Update”—so that certain devices remain fully operational during the transition from an old kernel to a new one. Essentially, the innovative Live Update Orchestrator (LUO) subsystem intends to minimize system downtime by preserving device states across a reboot, particularly benefiting dynamic cloud environments where even minor disruptions can be unwelcome. According to the developers, this approach uses a state-machine mechanism to orchestrate the transition. The LUO subsystem tracks progress through several states—“normal,” “prepared,” and “updated”—and ties them together through callback APIs. These callbacks allow other kernel subsystems (e.g., KVM, IOMMU, interrupts, the new dev_liveupdate device layer, and memory management) to integrate seamlessly into the live update workflow.' -- source: https://linuxiac.com/linux-kernel-might-get-smarter-reboots/ Cheers, Peter

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Google makes Android development private, will continue open source releases
by Peter Reutemann 27 Mar '25

27 Mar '25

'Google is planning a major change to the way it develops new versions of the Android operating system. Since the beginning, large swaths of the software have been developed in public-facing channels, but that will no longer be the case. This does not mean Android is shedding its open source roots, but the process won't be as transparent. Google has confirmed to Android Authority that all Android development work going forward will take place in Google's internal branch. This is a shift from the way Google has worked on Android in the past, which featured frequent updates to the public AOSP branch. Anyone can access AOSP, but the internal branches are only available to Google and companies with a Google Mobile Services (GMS) license, like Samsung, Motorola, and others. According to the company, it is making this change to simplify things, building on a recent change to trunk-based development. As Google works on both public and private branches of Android, the two fall out of sync with respect to features and API support. This forces Google to tediously merge the branches for every release. By focusing on the internal branch, Google claims it can streamline releases and make life easier for everyone. When new versions of Android are done, Google says it will continue to publish the source code in AOSP as always. Supposedly, this will allow developers to focus on supporting their apps without keeping track of pending changes to the platform in AOSP. Licensed OEMs, meanwhile, can just focus on the lively internal branch as they work on devices that can take a year or more to launch.' -- source: https://arstechnica.com/gadgets/2025/03/google-makes-android-development-pr… Cheers, Peter

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Linux Kernel 6.14 Is a Big Leap Forward In Performance, Windows Compatibility
by Peter Reutemann 27 Mar '25

27 Mar '25

'A report from ZDNet, written by Steven Vaughan-Nichols: Despite the minor delay, Linux 6.14 arrives packed with cutting-edge features and improvements to power upcoming Linux distributions, such as the forthcoming Ubuntu 25.04 and Fedora 42. The big news for desktop users is the improved NTSYNC driver, especially those who like to play Windows games or run Windows programs on Linux. This driver is designed to emulate Windows NT synchronization primitives. What that feature means for you and me is that it will significantly improve the performance of Windows programs running on Wine and Steam Play. [...] Gamers always want the best possible graphics performance, so they'll also be happy to see that Linux now supports recently launched AMD RDNA 4 graphics cards. This approach includes support for the AMD Radeon RX 9070 XT and RX 9070 graphics cards. Combine this support with the recently improved open-source RADV driver and AMD gamers should see the best speed yet on their gaming rigs. Of course, the release is not just for gamers. Linux 6.14 also includes several AMD and Intel processor enhancements. These boosts focus on power management, thermal control, and compute performance optimizations. These updates are expected to improve overall system efficiency and performance. This release also comes with the AMDXDNA driver, which provides official support for AMD's neural processing units based on the XDNA architecture. This integration enables efficient execution of AI workloads, such as convolutional neural networks and large language models, directly on supported AMD hardware. While Rust has faced some difficulties in recent months in Linux, more Rust programming language abstractions have been integrated into the kernel, laying the groundwork for future drivers written in Rust. [...] Besides drivers, Miguel Ojeda, Rust for Linux's lead developer, said recently that the introduction of the macro for smart pointers with Rust 1.84: derive(CoercePointee) is an "important milestone on the way to building a kernel that only uses stable Rust functions." This approach will also make integrating C and Rust code easier. We're getting much closer to Rust being grafted into Linux's tree. In addition, Linux 6.14 supports Qualcomm's latest Snapdragon 8 Elite mobile processor, enhancing performance and stability for devices powered by this chipset. That support means you can expect to see much faster Android-based smartphones later this year. This release includes a patch for the so-called GhostWrite vulnerability, which can be used to root some RISC-V processors. This fix will block such attacks. Additionally, Linux 6.14 includes improvements for the copy-on-write Btrfs file system/logical volume manager. These primarily read-balancing methods offer flexibility for different RAID hardware configurations and workloads. Additionally, support for uncached buffered I/O optimizes memory usage on systems with fast storage devices.' -- source: https://linux.slashdot.org/story/25/03/26/2110211 Cheers, Peter

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Developer Loads Steam On a $100 ARM Single Board Computer
by Peter Reutemann 24 Mar '25

24 Mar '25

'"There's no shortage of videos showing Steam running on expensive ARM single-board computers with discrete GPUs," writes Slashdot reader VennStone. "So I thought it would be worthwhile to make a guide for doing it on (relatively) inexpensive RK3588-powered single-board computers, using Box86/64 and Armbian." The guides I came across were out of date, had a bunch of extra steps thrown in, or were outright incorrect... Up first, we need to add the Box86 and Box64 ARM repositories [along with dependencies, ARMHF architecture, and the Mesa graphics driver]... The guide closes with a multi-line script and advice to "Just close your eyes and run this. It's not pretty, but it will download the Steam Debian package, extract the needed bits, and set up a launch script." (And then the final step is sudo reboot now.) "At this point, all you have to do is open a terminal, type 'steam', and tap Enter. You'll have about five minutes to wait... Check out the video to see how some of the tested games perform." At 720p, performance is all over the place, but the games I tested typically managed to stay above 30 FPS. This is better than I was expecting from a four-year-old SOC emulating x86 titles under ARM. Is this a practical way to play your Steam games? Nope, not even a little bit. For now, this is merely an exercise in ludicrous neatness. Things might get a wee bit better, considering Collabora is working on upstream support for RK3588 and Valve is up to something ARM-related, but ya know, "Valve Time"... "You might be tempted to enable Steam Play for your Windows games, but don't waste your time. I mean, you can try, but it ain't gonna work."' -- source: https://games.slashdot.org/story/25/03/23/1922228 Cheers, Peter

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Rebooting A Retro PDP-11 Workstation - and Its Classic 'Venix' UNIX
by Peter Reutemann 24 Mar '25

24 Mar '25

'This week the "Old Vintage Computing Research" blog published a 21,000-word exploration of the DEC PDP-11, the 16-bit minicomputer sold by Digital Equipment Corporation. Slashdot reader AndrewZX calls the blog post "an excellent deep dive" into the machine's history and capabilities "and the classic Venix UNIX that it ran." The blogger still owns a working 1984 DEC Professional 380, "a tank of a machine, a reasonably powerful workstation, and the most practical PDP-adjacent thing you can actually slap on a (large) desk." But more importantly, "It runs PRO/VENIX, the only official DEC Unix option for the Pros." In that specific market it was almost certainly the earliest such licensed Unix (in 1983) and primarily competed against XENIX, Microsoft's dominant "small Unix," which first emerged for XT-class systems as SCO XENIX in 1984. You'd wonder how rogue processes could be prevented from stomping on each other in such systems when neither the Intel 8086/8088 nor the IBM PC nor the PC/XT had a memory management unit, and the answer was not to try and just hope for the best. It was for this reason that IBM's own Unix variant PC/IX, developed by Interactive Systems Corporation under contract as their intended AT&T killer, was multitasking but single-user since in such an architecture there could be no meaningful security guarantees... One of Venix's interesting little idiosyncrasies, seen in all three Pro versions, was the SUPER> prompt when you've logged on as root (there is also a MAINT> prompt when you're single-user... Although Bill Gates had been their biggest nemesis early on, most of the little Unices that flourished in the 1980s and early 90s met their collective demise at the hands of another man: Linus Torvalds. The proliferation of free Unix alternatives like Linux on commodity PC hardware caused the bottom to fall out of the commercial Unix market. The blogger even found a 1989 log for the computer's one and only guest login session — which seems to consist entirely of someone named tom trying to exit vi. But the most touching part of the article comes when the author discovers a file named /thankyou that they're certain didn't come with the original Venix. It's an ASCII drawing of a smiling face, under the words "THANK YOU FOR RESCUING ME". "It's among the last files created on the system before it came into my possession..." It's all a fun look back to a time when advances in semiconductor density meant microcomputers could do nearly as much as the more expensive minicomputers (while taking up less space) — leaving corporations pondering the new world that was coming: As far back as 1974, an internal skunkworks unit had presented management with two small systems prototypes described as a PDP-8 in a VT50 terminal and a portable PDP-11 chassis. Engineers were intrigued but sales staff felt these smaller versions would cut into their traditional product lines, and [DEC president Ken] Olsen duly cancelled the project, famously observing no one would want a computer in their home.' -- source: https://tech.slashdot.org/story/25/03/22/1927247 Cheers, Peter

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Raspberry Pi Announces New Tool for Customized Software Images
by Peter Reutemann 24 Mar '25

24 Mar '25

'"For developers and organisations that require a custom software image, a flexible and transparent build system is essential," according to an announcement Friday at Raspberry Pi.com. "[T]o support these customers, we have created rpi-image-gen, a powerful new tool designed to put you in complete control of your Raspberry Pi images." If you're building an embedded system or an industrial controller, you'll need complete control over the software resident on the device, and home users may wish to build their own OS and have it pre-configured exactly the way they want... rpi-image-gen is an alternative to pi-gen, which is the tool we use to create and deploy the Raspberry Pi OS distribution. rpi-image-gen... offers a very granular level of control over file system construction and software image creation... [B]eing able to help reduce software build time, provide guaranteed ownership of support, and reuse standard methodologies to ensure authenticity of software were all of paramount importance, and among the reasons why we created a new home-grown build tool for Raspberry Pi devices... There is a small number of examples in the tree which demonstrate different use cases of rpi-image-gen [including the lightweight image slim and webkiosk for booting into browser kiosk mode]. All create bootable disk images and serve to illustrate how one might use rpi-image-gen to create a bespoke image for a particular purpose. The number of examples will grow over time and we welcome suggestions for new ones... Visit the rpi-image-gen GitHub repository to get started. There, you'll find documentation and examples to guide you through creating custom Raspberry Pi images. Some technical details from the announcement. - "Similar to pi-gen, rpi-image-gen leverages the power, reliability, and trust of installing a Debian Linux system for the device. However, unlike pi-gen, rpi-image-gen introduces some new concepts [profiles, image layouts, and config] which serve to dictate the build footprint and installation." - The tool also lets you exclude from your package "things that would otherwise be installed as part of the profile." - The tool's GitHub repository notes that it also allows you output your software bill of materials (SBOM) "to list the exact set of packages that were used to create the image." And it can even generate a list of CVEs identified from the SBOM to "give consumers of your image confidence that your image does not contain any known vulnerabilities."' -- source: https://build.slashdot.org/story/25/03/23/0012253 Cheers, Peter

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GIMP 3.0 Released
by Peter Reutemann 18 Mar '25

18 Mar '25

'GIMP 3.0 has been released after over a decade of development. Highlights include a refined GTK3 interface with scroll wheel tab navigation, a new splash screen, improved HiDPI icon support, enhanced color management, a stable public API, and support for more file formats. 9to5Linux reports: GIMP 3.0 also brings improvements to non-destructive editing by introducing an optional "Merge Filters" checkbox at the bottom of NDE filters that merges down the filter immediately after it's committed, along with non-destructive filters on layer groups and the implementation of storing version of filters in GIMP's XCF project files. Among other noteworthy changes, the GEGL and babl components have been updated with new features and many improvements, such as Inner Glow, Bevel, and GEGL Styles filters, some plugins saw small enhancements, and it's now possible to export images with different settings while leaving the original image unchanged. There's also a new PDB call that allows Script-Fu writers to use labels to specify filter properties, a brand new named-argument syntax, support for loading 16-bits-per-channel LAB PSD files, support for loading DDS images with BC7 support, early-binding CMYK support, and support for PSB and JPEG-XL image formats. On top of that, GIMP 3.0 introduces new auto-expanding layer boundary and snapping options, an updated search pop-up to show the menu path for all entries while making individual filters searchable, a revamped alignment tool, and support for "layer sets," replacing the older concept of linked layers. ' -- source: https://tech.slashdot.org/story/25/03/17/1948219 Cheers, Peter

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Wine Releases Framework Mono 6.14
by Peter Reutemann 11 Mar '25

11 Mar '25

'Today marks the release of Framework Mono 6.14, the first major Mono release in five years and the first under WineHQ's stewardship. This update includes long-awaited improvements such as native macOS ARM64 support, enhancements to System.Windows.Forms for X11, better COM interface support, and various stability fixes. Phoronix reports: In addition to the native macOS ARM64 support and System.Windows.Forms improvements for X11, some of the other Mono 6.14 improvements carried out over the past half-decade include improved support for generated COM interfaces, many warning fixes, addressing common cases where processes would hang on exit, and more. As for the "Framework Mono" name rather than just Mono, the release announcement explains: "Framework Mono is the project previously hosted at https://github.com/mono/mono, which was then simply called Mono. I have made this change to distinguish it from 'monovm' and 'Wine Mono', which are different projects. Framework Mono is a cross-platform runtime compatible with .NET Framework." ' -- source: https://tech.slashdot.org/story/25/03/10/2055237 Cheers, Peter

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Emacs 30.1 Released: New Features, Installation, and Usage Guide
by Peter Reutemann 07 Mar '25

07 Mar '25

'GNU Emacs is one of the oldest text editors. It was created by Richard Stallman, the founder of the Free Software movement and GNU project. He is also the creator of the GNU C compiler and Debugger. Emacs is a versatile and highly configurable text editor with hundreds of keybindings and commands. With numerous configuration settings, it’s arguably one of the text editors with a steep learning curve, so most developers, system administrators, and regular Linux users prefer Nano or Vim editors. Despite the complexity of learning the ins and outs of Emacs, it’s not entirely hostile to beginners, and with the right learning strategy and guidance, you’ll be comfortable in no time. In this guide, we will hold your hand and walk you through the Emacs editor. By the end of this guide, you will have a decent amount of knowledge to get started with using the Emacs editor.' -- source: https://www.linuxtoday.com/blog/emacs-30-1-released-new-features-installati… Cheers, Peter

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Phrase Of The Week: “Vegetative Electron Microscopy”
by Lawrence D'Oliveiro 05 Mar '25

05 Mar '25

Amusing summary <https://www.computerworld.com/article/3836728/you-thought-genai-hallucinati…> of research into how bad AIs can get in some of the rubbish results they produce. We knew they could lose their hold on reality and start making things up, but did you know they could also cheat, and tell lies about that cheating when confronted with it? For example, when given charge of doing share trades, and told not to (illegally) take advantage of insider information, they might do so anyway, and then simply deny it when challenged. Oh, and the phrase “vegetative electron microscopy” is complete nonsense; it originated when an AI was processing multicolumn text, and saw words next to each other which were in separate columns, not part of the same sentence at all, and ran them together anyway. From there, the phrase somehow spread to other publications ...

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