Comment # 44 on bug 1188970 from Thomas Zimmermann

> Created attachment 851469 [details]
> Xorg.0.log showing the degmentation fault.

The Xorg log here is a segmentation fault in the X server AFAICT. The kernel
error is not a segmentation fault. It's warning about invalid ref-counting.

> [Thu Oct 14 19:12:04 2021] broken atomic modeset userspace detected, disabling atomic
> [Thu Oct 14 19:12:04 2021] broken atomic modeset userspace detected, disabling atomic
> [Thu Oct 14 19:12:05 2021] WARNING: CPU: 0 PID: 4219 at ../drivers/gpu/drm/drm_gem_shmem_helper.c:197 drm_gem_shmem_put_pages_locked+0x4c/0x50 [drm]

I tend to think that both are unrelated. A kernel warning shouldn't crash the X
server. And there are other things happening in the kernel after that warning
shows up.