Thanks. That log shows something serious is going wrong: [10210.074616] ZB gnome-shell[7479]: meta_frame_native_release: assertion '!frame_native->kms_update' failed [10211.333121] ZB gnome-shell[7479]: Failed to query buffer age, got error 3003 [10211.341238] ZB gnome-shell[7479]: Failed to lock front buffer on /dev/dri/card1: gbm_surface_lock_front_buffer failed [10211.341256] ZB gnome-shell[7479]: meta_frame_native_release: assertion '!frame_native->kms_update' failed [10213.494948] ZB gnome-shell[7479]: Failed to query buffer age, got error 3003 [10213.507740] ZB gnome-shell[7479]: Failed to lock front buffer on /dev/dri/card1: gbm_surface_lock_front_buffer failed ...
But I can't tell what driver is in use or how many GPUs there are. Please follow the steps in comment #3 so we can see more details, and after that try downloading the next proposed update from: https://launchpad.net/ubuntu/+source/mutter/50.0-0ubuntu3/+build/32745314 ** Changed in: gnome-shell (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2147324 Title: Visual artifact when changing screen content To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/2147324/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
