13:04 <jannau> lina: the pink boxes could be a fencing error. I see drm_gem_plane_helper_prepare_fb end up sometimes without fence

13:05 <jannau> is it expected that the fb has no explicit fence?

14:51 <jannau> second kwin_wayland segfault in apple_dri after failed DRM_IOCTL_ASAHI_GEM_BIND, unfortuantely without mesa debug symbols, mesa already recompiled

15:15 <lina> jannau: It is expected that the FB has no explicit fence if and only if the render was issued before export, actually completed, and then the buffer was exported when it was known to be idle.

15:15 <lina> But I suspect there is a bad codepath somewhere around that

15:16 <lina> GEM_BIND should never fail unless an invariant was violated (debug build should catch that) or something went very weirdly wrong with VA tracking or memory exhaustion or something...

15:44 <jannau> I haven't seen any fb with explicit fence, most fbs from kwin get implicit fences

15:46 <jannau> there was roughly 2 1/2 days of use before the GEM_BIND failures so it could be an issue that manifest only over time/use