Bug#1104326: Apparently Fixed in mesa 25.0.5-1

[Jeremy Stanley]

A lot of users (myself included) started hitting game startup 
failures with Proton 10/experimental and 9/hotfix recently (also 
with Proton 8 on some systems), where dropping back to something 
like Proton 7 got things working. The Proton devs attribute it to a 
recent Mesa regression supposedly fixed by 
https://gitlab.freedesktop.org/mesa/mesa/-/commit/ac96c18 in Mesa 
25.0.6 (not yet in Debian). If you're experiencing a problem along 
these lines not fixed by the recent 25.0.5 packages and have an AMD 
GPU, then it might be that.
--
Jeremy Stanley