Bazzite testing-45.20261031.3 updates Mesa 26.2.6, Gamescope 3.17, UMU Launcher 1.4.4

Bazzite, the Fedora-based immutable gaming distribution that targets Steam Deck and desktop Linux gaming hardware, has published testing-45.20261031.3 as a pre-release update. This build advances multiple core components including Mesa 26.2.6-2, Gamescope 3.17.0^1-1, Gamescope Session from a 20261002 git snapshot, MangoHUD 0.8.4-2, InputPlumber 0.83.1-3, OpenGamepadUI 0.46.1-8, and UMU Launcher 1.4.4-1. The kernel stack offers two tracks: a 7.2.14-ogc3.1 mainline variant and a 6.18.56-ogc1.1 LTS branch for NVIDIA users, paired with NVIDIA Open 615.78.08-1 and NVIDIA LTS 580.196.07-1 drivers respectively.

Desktop environment updates include GNOME 51.0-2 and KDE 6.8.1-1, while container and compatibility tooling sees Distrobox 1.8.2.5-2, Waydroid 1.6.3-2, and Bazaar 0.9.4-5. The single explicit code change in this release removes a stale Plasma Setup autologin configuration file, addressing a configuration drift issue. Users can rebase to this version via the bazzite-rollback-helper utility.

Component updates in Bazzite testing-45.20261031.3

• Graphics stack: Mesa 26.2.6-2 and Gamescope 3.17.0^1-1 ship alongside a Gamescope Session built from git commit 08e65a6 dated 20261002, updating the Wayland compositor path used for Steam Big Picture and handheld-mode gaming.
• Kernel and NVIDIA drivers: Two kernel tracks are provided: 7.2.14-ogc3.1 for general use and 6.18.56-ogc1.1 for NVIDIA LTS, matched with NVIDIA Open 615.78.08-1 and NVIDIA LTS 580.196.07-1 proprietary driver branches.
• Input and overlay layers: InputPlumber 0.83.1-3, OpenGamepadUI 0.46.1-8, MangoHUD 0.8.4-2, and PowerStation 0.8.4-2 update controller abstraction, handheld UI, performance overlay, and power management subsystems.
• Compatibility and scheduling: UMU Launcher 1.4.4-1 (Unified Linux Game Launcher for Proton/UMU integration) and sched_ext Schedulers 1.1.4-1 advance game compatibility and BPF-scheduler extensibility.
• Configuration fix: Commit 044a216 removes a stale Plasma Setup autologin configuration, resolving an autologin state drift issue for KDE Plasma users.

Why it matters

For Steam Deck and handheld PC Linux gamers running Bazzite, this testing release tightens the feedback loop between upstream Mesa, Gamescope, and UMU Launcher improvements and end-user systems without waiting for Fedora or SteamOS stable cycles. The inclusion of sched_ext Schedulers 1.1.4-1 also signals continued investment in BPF-based CPU scheduling for gaming workloads, a technique being actively upstreamed into the Linux kernel and relevant to latency-sensitive emulation and PC gaming.