If there's a kernel stack trace mentioning "drm_atomic_nonblocking_commit" around the same time then please also paste that here. It's not yet clear if this is mutter or the kernel's fault.
Likely workaround: Add to /etc/environment MUTTER_DEBUG_FORCE_KMS_MODE=simple and then reboot. ** Summary changed: - Mouse pointer disappears on the second screen + Mouse pointer disappears on the second screen [Failed to post KMS update: drmModeAtomicCommit: Device or resource busy] ** Package changed: gnome-shell (Ubuntu) => mutter (Ubuntu) ** Also affects: linux (Ubuntu) Importance: Undecided Status: New ** Changed in: linux (Ubuntu) Status: New => Incomplete ** Tags added: cursor multimonitor ** Tags added: i915 -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/2003998 Title: Mouse pointer disappears on the second screen [Failed to post KMS update: drmModeAtomicCommit: Device or resource busy] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2003998/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs