[DRM backend] Mouse look broken in Plague Tale: Requiem

[tobiasjakobi]

Affected game: Plague Tale: Requiem Affected version: 3.15.5 (went back to 3.14.24 which has the same problem)

Mouse behaviour:

• mouse is stuck in menu, can sometimes be un-stuck by strong movement / wiggling
• mouse appears to be constrained to tiny area in-game (wiggling has minimal effect on look)

Gamescope setup:

• DRM backend
• started by greetd
• gamescope spawns Steam session

Emulation layer:

• GE-Proton9-13

Working setup:

• Sway v1.9 (i.e. the issue does not appear if you take gamescope out of the equation)
• wlroots v0.17.4

Problem appears to be similar to the behaviour I experienced with SOMA: https://github.com/ValveSoftware/gamescope/issues/1467#issuecomment-2359148860

Only that no amount of restarting removes the constraints that basically make mouse input inoperable.

[tobiasjakobi]

Might be related to this one: https://github.com/ValveSoftware/gamescope/issues/1531

Major difference:

• RE8 has no mouse problems in the menu
• RE8 shows no mouse look movements whatsoever in-game (even when wiggling)