Does terminating light-locker and running "dm-tool lock" trigger the bug?
I assume that the problem is either caused by the GPU driver (both systems have the same generation Intel graphics) or lightdm-gtk-greeter.
Does terminating light-locker and running "dm-tool lock" trigger the bug?
I assume that the problem is either caused by the GPU driver (both systems have the same generation Intel graphics) or lightdm- gtk-greeter.