Comment # 7 on bug 1187510 from David Walker

FYI, with only a couple of hours of use, I haven't seen any display "crashes"
while using the recent release of Tumbleweed for ARM (20210710 - kernel
5.13.0-1-default), although the display mysteriously wouldn't wake up this
morning (in response to pressing Shift on the keyboard) until I restarted
display-manager. I did get the "flip_done timed out" log messages 6-7 minutes
after the system booted at 17:20 on July 13:

Jul 13 17:26:38 rpi4a.WalkerStreet.info kernel:
[drm:drm_atomic_helper_wait_for_flip_done [drm_kms_helper]] *ERROR*
[CRTC:66:crtc-3] flip_done timed out
Jul 13 17:26:38 rpi4a.WalkerStreet.info kernel: [drm:drm_crtc_commit_wait
[drm]] *ERROR* flip_done timed out
Jul 13 17:26:48 rpi4a.WalkerStreet.info kernel: [drm:drm_crtc_commit_wait
[drm]] *ERROR* flip_done timed out
Jul 13 17:26:58 rpi4a.WalkerStreet.info kernel: [drm:drm_crtc_commit_wait
[drm]] *ERROR* flip_done timed out
Jul 13 17:27:08 rpi4a.WalkerStreet.info kernel: [drm:drm_crtc_commit_wait
[drm]] *ERROR* flip_done timed out