I do still get this error eventually with the 5.13.0-1008-raspi kernel. This usually happens overnight after the screen has gone to sleep, after which I can not bring the screen back up until a reboot.
[ 6411.078361] [drm:drm_atomic_helper_wait_for_flip_done [drm_kms_helper]] *ERROR* [CRTC:77:crtc-3] flip_done timed out [ 6411.078388] [drm:drm_crtc_commit_wait [drm]] *ERROR* flip_done timed out [ 6411.078621] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [CRTC:77:crtc-3] commit wait timed out [ 6421.318663] [drm:drm_crtc_commit_wait [drm]] *ERROR* flip_done timed out [ 6421.319004] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [PLANE:71:plane-3] commit wait timed out [ 6431.558919] [drm:drm_crtc_commit_wait [drm]] *ERROR* flip_done timed out [ 6431.559217] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [PLANE:206:plane-25] commit wait timed out [ 6441.799164] [drm:drm_crtc_commit_wait [drm]] *ERROR* flip_done timed out [ 6441.799388] vc4-drm gpu: [drm] *ERROR* Timed out waiting for commit (this is followed by the display -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1944397 Title: HDMI does not display anything with Impish RPi desktop image To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-firmware-raspi2/+bug/1944397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs