Thanks. This is probably a kernel or driver issue. Since you're using a non- Ubuntu kernel first please try downgrading to a supported Ubuntu kernel.
** Tags added: amdgpu nvidia ** Summary changed: - Desktop blinks / flashes after unlocking the system ubuntu 18.04.4 + Desktop blinks / flashes after unlocking the system ubuntu 18.04.4 (nvidia + amdgpu) ** Changed in: gnome-shell (Ubuntu) Status: Incomplete => Invalid ** Also affects: linux (Ubuntu) Importance: Undecided Status: New ** Changed in: linux (Ubuntu) Status: New => Incomplete ** Also affects: nvidia-graphics-drivers-440 (Ubuntu) Importance: Undecided Status: New ** Also affects: xserver-xorg-video-amdgpu (Ubuntu) Importance: Undecided Status: New -- 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/1865316 Title: Desktop blinks / flashes after unlocking the system ubuntu 18.04.4 (nvidia + amdgpu) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1865316/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs