Sadly I'm still getting vc4 freezes in atomic KMS functions even when GNOME has been told not to use it:
Oct 08 16:16:31 pi400 gnome-shell[968]: Mode setting implementation for '/dev/dri/card1' (vc4) forced (non-atomic). ... Oct 08 16:24:38 pi400 kernel: [drm:drm_crtc_commit_wait [drm]] *ERROR* flip_done timed out Oct 08 16:24:38 pi400 kernel: [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [CRTC:76:crtc-3] commit wait timed out Oct 08 16:24:48 pi400 kernel: [drm:drm_crtc_commit_wait [drm]] *ERROR* flip_done timed out Oct 08 16:24:48 pi400 kernel: [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [PLANE:70:plane-3] commit wait timed out I guess the vc4 kernel is trying to implement non-atomic KMS using a buggy atomic implementation. :( ** Changed in: mutter (Ubuntu Impish) Status: In Progress => Invalid -- 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