Bazzite's September update fixes AMD VRR flickering and ROG Ally X sleep bugs

The Universal Blue project has released the September 6 update for Bazzite, delivering fixes for AMD graphics pipelines and resolving a specific sleep state bug on the ROG Ally X. The update is available now for all supported handhelds and desktop PCs.

Bazzite launched in 2023 as a custom Linux operating system built on Fedora Atomic Desktops. It uses cloud-native containerized base images and rpm-ostree to replicate the SteamOS experience on non-Valve hardware. Because the base system is immutable, updates are delivered as complete system images rather than individual package upgrades. This approach provides a robust environment for gaming, but it requires constant maintenance to support the rapidly expanding market of third-party handhelds. Devices like the Lenovo Legion Go and the AYANEO series rely on these rolling updates to maintain feature parity with the Steam Deck, particularly when it comes to power management and controller mapping.

TDP controls and display fixes

The most prominent graphics fix targets AMD hardware. Users connecting to external displays via HDMI 2.1 with Variable Refresh Rate enabled previously experienced flickering or complete signal loss. The September 6 patch resolves the display pipeline issue entirely, stabilizing external monitor support for desktop users and docked handhelds.

Power management also received attention. OpenGamepadUI now includes toggles for both TDP Boost and Simultaneous Multithreading across all supported handhelds. Disabling SMT can measurably improve battery life on handhelds by limiting the processor to physical cores, which is often preferable for older or less demanding games. Users can find these options in the Steam Quick Access Menu under the TDP Limit toggle, provided the performance profile is set to custom. The developers also added native TDP control to several additional third-party handhelds, with more hardware support planned for future releases.

Sleep states and shortcuts

The ROG Ally X launched in July 2024 with a larger 80Wh battery, 24GB of RAM, and redesigned grips. It quickly became a primary target for alternative Linux distributions due to its hardware advantages over the original model. However, it suffered from a specific hardware state bug under Bazzite: the device would refuse to enter sleep mode if a user pressed any controller buttons during the sleep transition animation. This update corrects the transition logic.

The update also fixes an input abstraction flaw. Certain non-Valve handhelds were incorrectly emulating Steam Deck controller hardware at the system level. This false emulation broke default chorded inputs, specifically preventing the Steam plus A or B button shortcuts from registering. The input mapping now correctly identifies the host hardware, restoring the default SteamOS shortcut behavior.