Untitled Linux Show 276

Episode Summary

The panel covered Linux desktop and kernel developments, file-system reliability, gaming performance, privacy-focused hardware, and several security incidents.

Desktop and Applications

• OBS Studio 33: The release includes updates to the Chromium Embedded Framework, NVIDIA encoding, and ARM64 support. Jonathan Bennett described building a personal OBS fork that outputs video through PipeWire, enabling a virtual-camera-like workflow. He used Claude to adapt an earlier patch after OBS upstream declined it, citing Flatpak portal limitations. Because the OBS project has a strict policy against AI-generated code, he did not submit the work upstream.
• Calibre 9.17: Ken highlighted new and improved features, including AI-generated cover art, image previews in the book editor, an interactive AI-assisted adventure-writing feature, improved read-aloud voices, JPEG XL conversion support, and faster conversions. He recommended checking the cited coverage and Calibre’s release notes for the full list.
• SonicDE: This community fork of KDE Plasma aims to preserve and develop X11 support as KDE moves toward Wayland. The project is building its own desktop components and compositor. It also aims to avoid dependence on a particular init system and potentially support BSD. Its ability to maintain a full desktop environment remains uncertain.
• PipeWire 1.6.10: The update fixes several stability and audio issues, including potential X11-module crashes, JACK-related crashes, and pops or clicks at the end of some audio streams. It also improves Bluetooth handling and GStreamer video-buffer integration.

Storage and File Systems

• Personal ZFS migration walkthrough: Jeff explained how he moved a 10-TB media collection from a three-drive MDADM mirror with ext4 to a ZFS mirror while maintaining multiple copies during the process. He covered setting up the pool, copying data with rsync, replacing drives one at a time, and monitoring drive temperatures during resilvering.
  • The main motivation was ZFS’s checksumming and ability to repair corrupted blocks using another mirror copy. Jeff also noted that RAID provides redundancy, not a substitute for backups.
  • He compared ZFS with Btrfs, mentioning concerns about Btrfs parity RAID’s write-hole issue and its production-readiness status.
• BeamFS proposal: This proposed experimental Linux file system uses Reed–Solomon error correction to detect and repair some corruption even when only one copy of the data exists. It is intended for environments such as satellites or medical equipment, where radiation can affect stored data. BeamFS is not yet in the kernel, lacks journaling, and could cause data loss or crashes. Its developer used AI assistance to write code and prepare patches.
• Linux 7.3: Highlights include AMD VRAM management changes intended to give higher-priority applications, such as games, better access to limited GPU memory, and a new scheduler mode aimed at improving responsiveness under heavy background CPU load. The release also brings file-system performance work, including faster ext4 and XFS operations and potentially faster Btrfs fsync, as well as new hardware support. The panel noted that Linux 7.4’s eventual LTS status was still uncertain.

Distributions, Devices, and Hardware

• Omarchy: Ken covered Omarchy 4.0.5 and 4.0.6, including kernel and package updates, Steam graphics-driver selection improvements, audio fixes, and a security fix for screen locking before suspend. Jonathan added that Omarchy had also announced an ARM installer and previewed further desktop changes.
• Privacy-focused Android phone: Rob discussed a forthcoming small Android phone with a physical keyboard, a 4-inch OLED screen, 8 GB of RAM, 128 GB of storage, and a 50 MP camera. Its de-Googled Android variant offers privacy controls, including a hardware switch for disabling selected components and options for wiping data after failed unlock attempts or use of a duress password. The panel cautioned that some apps—particularly banking apps—may not work without Google Play services. The stated price was $550, or $449 for an early full-payment preorder; the $30 amount was only a deposit.
• AMD Ryzen overclocking driver: Jeff described proposed kernel patches for an official AMD overclocking driver on Linux. The initial version exposes CPU power and current limits and allows firmware-level SMT control, but changes require a reboot. The patches were still under review, and no official graphical control app was included.

Security

Jonathan called it a particularly bad week for security:

• An Indian certificate authority, eMudhra, reportedly issued a certificate whose secret key was effectively the number four, making it easy to brute-force. Browsers moved to distrust the affected certificates, though the panel noted that system tools such as curl and older systems may need separate certificate updates.
• A serious PHP memory-corruption vulnerability, referred to as “PHP to shell,” received a public proof of concept. Administrators were urged to patch.
• The panel also mentioned reported Node.js and HTTP-related vulnerabilities.
• A Broadcom Wi-Fi driver flaw reportedly dating back to 2010 affected some older routers. Affected devices may remain vulnerable if they have not received suitable firmware updates.

Guides, Reviews, and Practical Tips

• Guide: Jeff’s ZFS migration account provided a practical, step-by-step description of moving a multi-drive MDADM array to ZFS while preserving extra copies during the transition.
• Command-line tips:
  • Ken recommended calibredb for managing a Calibre library, including listing books and checking library consistency.
  • Rob recommended netdoctor for network diagnostics, such as DNS and connectivity checks.
  • Jeff recommended wipefs for inspecting and removing file-system or RAID signatures. He emphasized checking device identities carefully and noted that wipefs does not securely erase data.
  • Jonathan suggested using browser and curl checks to verify whether a system rejects the problematic certificate authority.
• Book review: Rob mentioned that his memoir had a 4.6-star Amazon rating; Ken said he had given it a four-star review.

Main Speakers and Sources

Speakers: Jonathan Bennett (host), Ken, Rob, and Jeff.

Sources cited in the discussion: OBS, Calibre, KDE/SonicDE, PipeWire, Linux kernel, Omarchy, BeamFS, and AMD patch announcements or project materials; reporting by Bobby Borisov, Marcus Nestor, George Whitaker, and Umar Central; and the eMudhra certificate test site.