** Description changed:
If I try to switch to a terminal by Ctrl-Alt-F1 or greater, screen is black.
But I can return by Ctrl-Alt-F7 (if light-locker is not used).
This happens with nvidia-340 driver (I am using version
340.107-0ubuntu0.18.04.1 from bionic-updates, but not with nouveau drive
** Description changed:
- Does not respond when I lock by light-locker. Same thing happens when I
- switch user even if light-locker is not running. Display stays black,
- but keyboard lights stay on.
+ If I try to switch to a terminal by Ctrl-Alt-F1 or greater, screen is black.
But I can return
