Valve recently released the SteamOS 3.8.28 Beta test update, focusing on fixing performance drops that may occur after waking from sleep on systems equipped with AMD discrete graphics cards.
According to Valve's official update log, this fix primarily targets hardware devices using AMD discrete graphics cores, such as the Steam Deck.
Valve did not provide detailed information on the specific percentage of performance loss or list the affected GPU architectures, but confirmed that the issue occurs during the transition from hibernation to active state.
In simple terms, this bug prevents the GPU from returning to its normal operating frequency after waking up, causing significant fluctuations in game frame rates.
Moreover, this is not the first time Valve has addressed performance issues related to the "sleep wake" mechanism in SteamOS.
Valve had previously addressed an issue where CPU performance remained low after waking the Steam Deck, requiring users to restart the system to restore the processor's normal operating frequency.
Additionally, the SteamOS 3.9.1 Preview version also provided suspend and resume fixes for discrete GPUs based on RDNA1 and RDNA2 architectures.
For SteamOS systems running in handheld or living room console mode, the stability of the sleep function directly impacts the player experience.
The update is currently available only on the Beta and Preview channels. Regular users need to manually switch channels in the system settings to download and try it out.