I did the following now: Updating from a working state just the Mesa*23.0.0* packages => crashing again. And tested vice versa: Using current tumbleweed, but downgraded just the Mesa packages to 22.3.5 => seems to be stable. (required to downgrade also kwin and plasma) I try now to mix current Mesa with just the old nouveau driver, not sure if that will work, but I think we can safely point to the Mesa 23.0.0 update.