Bug#922679: Locking screen with light-locker/nvidia-driver crashes system to blinking cursor

nodiscc nodiscc at gmail.com
Tue Feb 19 11:03:22 GMT 2019


Package: nvidia-driver
Version: 390.87-8~deb9u1

Dear maintainer,

as mentioned in https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=868087
and https://github.com/the-cavalry/light-locker/issues/77, there is a problem
when using a combination of the proprietary nvidia-driver + light-locker +
lightdm: when locking the screen, the login/unlock screen is never shown.
Instead we are sent to a console screen with only a fast blinking cursor.
Changing vtty with Ctrl+Alt+F1...F7 does not work and only rebooting allows
getting back a login screen.

The solution I found was simply to generate a /etc/X11/xorg.conf file using
'sudo nvidia-xconfig'.

The docs at https://wiki.debian.org/NvidiaGraphicsDrivers suggest it is no
longer needed to run nvidia-xconfig, but for me it was. After running it,
the screen locking mechanism immediately started working correctly.

Maybe the wiki should recommend running sudo nvidia-xconfig anyway to avoid
such problems? It would be even better if the nvidia-driver package's
postinst script did it automatically.
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