Compatibility Report

• Name of the game with compatibility issues: Portal 2
• Steam AppID of the game: 620

System Information

• GPU: AMD Custom GPU 0405 (RADV VANGOGH)
• Video driver version: AMD RADV 25.99.99
• Kernel version: 6.16.2
• Link to full system information report as Gist: https://gist.github.com/ngoquang2708/f277506d8a3bd47144cda2bec0c19b19
• Proton version: 10.0-4

I confirm:

• [ x] that I haven't found an existing compatibility report for this game.
• [ x] that I have checked whether there are updates for my system available.

Log

steam-620.zip

Symptoms

Game run at unlocked FPS even with Wait For Vertical Sync set to Enabled (Triple Buffered) causing battery drain on the Steam Deck. Note that this is with Disable Frame Limit set in the Steam Deck Quick Settings.

Reproduction

Run the game with Disable Frame Limit set in the Steam Deck Quick Settings.

PS

The game should NOT be set to use Proton by default in the first place.