The flickering happened again today around 12:11 local time. I captured the journal immediately afterward with:
journalctl -b0 > journal-flicker.txt I have attached the full journal. I noticed these repeated gnome-shell messages shortly before the flicker became visible: May 29 12:09:05 gnome-shell[5391]: Failed to lock front buffer on /dev/dri/card1: gbm_surface_lock_front_buffer failed May 29 12:09:21 gnome-shell[5391]: Failed to lock front buffer on /dev/dri/card1: gbm_surface_lock_front_buffer failed May 29 12:09:44 gnome-shell[5391]: Failed to lock front buffer on /dev/dri/card1: gbm_surface_lock_front_buffer failed This was after installing the latest kernel and Mutter updates. I had not run the MUTTER_DEBUG_MULTI_GPU_FORCE_COPY_MODE workaround after reboot, so the flickering occurred without the workaround active. After collecting the log, I re-enabled the workaround. ** Attachment added: "journal-flicker.txt" https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/2153478/+attachment/5974359/+files/journal-flicker.txt -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/2153478 Title: External HDMI monitor flickers on GNOME Wayland hybrid Intel/NVIDIA; fixed by MUTTER_DEBUG_MULTI_GPU_FORCE_COPY_MODE To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/2153478/+subscriptions -- desktop-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
