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Latest Linux Hardware Reviews, Open-Source News & Benchmarks

Intel Posts Updated CPU Microcode For Two More SGX Vulnerabilities, Privilege Escalation Bug
Intel Posts Updated CPU Microcode For Two More SGX Vulnerabilities, Privilege Escalation Bug
9 Hours Ago - Intel - New Vulnerabilities - 1 Comment

Patch Tuesday brought AMD disclosing a Ryzen Master security issue on Windows and the Cross-Thread Return Address Predictions bug requiring new handling by Linux's KVM. Over on the Intel side they have disclosed nearly three dozen new issues and as a result also published new Linux CPU microcode files for their recent processors to address the disclosures.

Linux Fix Coming For Recent Stuttering On AMD Ryzen Due To fTPM RNG
Linux Fix Coming For Recent Stuttering On AMD Ryzen Due To fTPM RNG
14 February 07:20 PM EST - AMD - AMD Linux Stuttering - 15 Comments

Last year AMD issued an advisory around "intermittent system stutter" when engaging the Firmware Trusted Platform Module "fTPM" with newer Ryzen systems running Windows 10 and Windows 11. While at first this only manifested on Windows, with Linux 6.1+ enabling the AMD fTPM RNG by default when present, this system stuttering issue has begun affecting Linux users too.

dav1d 1.1 Released With More AVX-512 Improvements
dav1d 1.1 Released With More AVX-512 Improvements
14 February 04:00 PM EST - Multimedia - dav1d 1.1 - Add A Comment

Yet another prominent open-source software release for Valentine's Day today is... dav1d v1.1! This leading open-source AV1 video decoder is out with its first major update in nearly one year and comes with more AVX-512 tuning as well as more work on Arm NEON optimizations.

Linux KVM Gets Patched For New AMD Cross-Thread Return Address Predictions Bug
Linux KVM Gets Patched For New AMD Cross-Thread Return Address Predictions Bug
14 February 12:30 PM EST - AMD - Cross-Thread Return Address Predictions - 3 Comments

CVE-2022-27672 is being made public today as the "Cross-Thread Return Address Predictions" bug affecting various AMD and Hygon processors. This vulnerability affects the SMT mode where one sibling thread transitions out of the C0 state and the other sibling thread could use return target predictions.

Canonical Promotes Ubuntu's Real-Time "RT" Kernel To General Availability
Canonical Promotes Ubuntu's Real-Time "RT" Kernel To General Availability
14 February 08:00 AM EST - Ubuntu - Ubuntu Real-Time Kernel - 22 Comments

Nearly one year ago with the Ubuntu 22.04 LTS premiere came a beta real-time kernel offered by Ubuntu maker Canonical and intended to help with Ubuntu Linux deployments in industrial environments, automotive, and other sectors with real-time computing needs. This Valentine's Day the Ubuntu real-time kernel has been promoted to general availability (GA) status.

libvpx VP8/VP9 1.13 Released With Yet More AVX2 & Arm Neon Optimizations
14 February 12:00 AM EST - Google - VP9 Encoder - Add A Comment

Google engineers last week released libvpx 1.13 as the newest feature release to this library that serves as the reference software implementation for the VP8 and VP9 codecs. While Google engineers have already spent years tuning libvpx for maximum performance with Advanced Vector Extensions (AVX), the game is not over and v1.13 has yet more tuning there -- along with continued Arm Neon optimizations too.

13 February

Sway & wl-roots Land Support For Wayland Fractional Scaling
Sway & wl-roots Land Support For Wayland Fractional Scaling
13 February 05:07 PM EST - Wayland - Wayland Fractional Scaling - 27 Comments

Back in November Wayland Protocols 1.31 released and was headlined by a new extension to handle fractional scaling. The latest Wayland compositor adding support for fractional scaling is now the popular i3-inspired Sway compositor as well as the wl-roots library used by it and other compositors.

Microsoft Officially Launches D3D12 GPU Video Acceleration For WSL Linux Use
Microsoft Officially Launches D3D12 GPU Video Acceleration For WSL Linux Use
13 February 01:00 PM EST - Microsoft - Windows Subsystem for Linux - 40 Comments

For over a year I have been writing about how Microsoft has been working on Direct3D video acceleration for Mesa, getting VA-API mapped atop Direct3D 12 video APIs, video engine based effects, and other enablement around Direct3D 12 video support. Microsoft has today officially released the Direct3D 12 GPU video acceleration support now for Windows Subsystem for Linux (WSL) users.

The Current State Of GCC 13's Rust Language Front-End
The Current State Of GCC 13's Rust Language Front-End
13 February 12:30 PM EST - GNU - GCC Rust Front-End - 24 Comments

Arthur Cohen with Embecosm presented at the FOSDEM developer conference earlier this month on gccrs, the ongoing effort to provide a Rust language front-end to the GCC compiler. While the GCC Rust front-end has been merged for the upcoming GCC 13 release, it's not yet in a state that will really be usable to most Rust developers yet as an alternative to Rust's official LLVM-based compiler.

Mesa's Rusticl Lands Support For SPIR-V Programs
Mesa's Rusticl Lands Support For SPIR-V Programs
13 February 08:45 AM EST - Mesa - SPIR-V Programs - 5 Comments

It's been a while since there has been any major additions to Mesa's Rusticl OpenCL implementation led by Red Hat's Karol Herbst while today he merged support for SPIR-V programs to this Rust-written driver. This SPIR-V support is necessary for eventually supporting SYCL and HIP.

More Rust Code Readied For Linux 6.3 - Closer To Having Rust Drivers Upstreamed
More Rust Code Readied For Linux 6.3 - Closer To Having Rust Drivers Upstreamed
13 February 07:42 AM EST - Linux Kernel - Rust For Linux - 56 Comments

While initial Rust code was merged for Linux 6.1, it's not yet used by any kernel drivers or functionality for end-users and the integration and other abstractions for Rust are still being established. With the upcoming Linux 6.3 cycle, more of that Rust groundwork is set to be merged and nearing the point of Rust-written kernel modules/drivers will be able to be upstreamed.

12 February

11 February

Hangover Project Restarted To Run Windows 32-bit/64-bit Apps On ARM64/PPC64 & More
11 February 12:25 PM EST - WINE - Wine Hangover - 53 Comments

Several years ago the open-source "Hangover" project started as allowing Windows x86_64 and x86 programs to run on 64-bit ARM Linux by leveraging the upstream Wine software as well as QEMU. Hangover also saw work for allowing Windows programs to run on POWER9 Linux hardware and other architectures. The Hangover project has been on hiatus but is now back to being revived.

Open-Source Software Encode/Decode For H.266/VVC Progressing
11 February 11:24 AM EST - Multimedia - Versatile Video Coding - 134 Comments

The H.266 / Versatile Video Coding (VVC) standard was finalized back in 2020 and while the hardware acceleration is currently limited to a few SoCs with video decode, in the years ahead there will likely be plenty of content encoded in H.266/VVC. The Fraunhofer HHI group in Germany has been working to ensure capable open-source support around this video compression standard with their VVenC encoder and VVdeC decoder.

FFmpeg Is Ripe For More AVX-512 Optimizations
11 February 07:20 AM EST - Multimedia - FFmpeg + AVX-512 - 28 Comments

There is already some AVX-512 optimizations for software contained within the FFmpeg multimedia library, but there is room for greater AVX-512 usage especially now with AMD supporting this Advanced Vector Extensions expansion and the latest Intel Xeon CPUs having little associated cost now with AVX-512 use.

10 February

Intel Enables Compute-Based Transcoding To DXT5 With Mesa
10 February 10:00 AM EST - Intel - Better Performance - 1 Comment

An Intel engineer has implemented compute-based transcoding support to the DXT5 texture format as part of S3TC texture compression. This new path yields a 56% decrease in upload time for a texture upload micro-benchmark when tested on an Intel Ice Lake system with the Iris Gallium3D driver.

Another Attempt Made To Upstream An Apple Touch Bar Linux Driver
10 February 06:38 AM EST - Apple - Apple Touch Bar + Backlight - 8 Comments

Apple introduced the Touch Bar to their MacBook Pro laptops a half-decade ago as a dynamic touchscreen to replace the function keys on the keyboard. While some MacBook Pro models have already dropped the Touch Bar for not catching on, some community developers in the open-source Linux community continue work on enabling the functionality for the upstream Linux kernel.

Fedora's New Web-Based Installer UI Is Shaping Up Nicely
10 February 05:55 AM EST - Red Hat - Fedora Web UI Installer - 35 Comments

Red Hat engineers have been working on a new web-based user-interface for Fedora's installer for more than on year now and it's been worked into good shape while still not at feature parity to the Anaconda installer with its GTK interface. Martin Kolman presented at FOSDEM last weekend on Fedora's new installer UI to offer insight into their motives for making it web-based and what work remains.

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