Arch Linux

tlanglois

Member

Registered: 2018-11-14

Posts: 2

Locking screen in lightdm crashes X

Hello,
Background:
1. The system was working well since arch installation
2. my graphic card is a  Quadro FX 580 it was being used via its DVI port.
3. I bought a new monitor that has only HDMI and DisplayPort inputs.
4. Since the graphic card has no HDMI port I must use the DisplayPort
5. The nouveau driver did not work at all
6. I installed the nvidia-340xx driver and it worked... kind of:

The problem:
Each time I use the dm-tool lock, dm-tool switch-to-greeter or light-locker-command -l the screen becomes black, and I can't access virtual terminals.

The lighdm.log shows:
[+15.37s] DEBUG: Seat seat0 changes active session to
[+15.37s] DEBUG: Seat seat0 changes active session to 2
[+15.37s] DEBUG: Session 2 is already active
[+467.50s] DEBUG: Seat seat0: Creating greeter session
[+467.50s] DEBUG: Seat seat0: Creating display server of type x
[+467.50s] DEBUG: Using VT 8
[+467.50s] DEBUG: Seat seat0: Starting local X display on VT 8
[+467.50s] DEBUG: XServer 1: Logging to /var/log/lightdm/x-1.log
[+467.50s] DEBUG: XServer 1: Writing X server authority to /run/lightdm/root/:1
[+467.50s] DEBUG: XServer 1: Launching X Server
[+467.50s] DEBUG: Launching process 857: /usr/bin/X :1 -seat seat0 -auth /run/lightdm/root/:1 -nolisten tcp vt8 -novtswitch
[+467.50s] DEBUG: XServer 1: Waiting for ready signal from X server :1
[+468.18s] DEBUG: Seat seat0 changes active session to
[+468.33s] DEBUG: Process 857 exited with return value 1
[+468.33s] DEBUG: XServer 1: X server stopped
[+468.33s] DEBUG: Releasing VT 8
[+468.33s] DEBUG: XServer 1: Removing X server authority /run/lightdm/root/:1
[+468.33s] DEBUG: Seat seat0: Display server stopped
[+468.33s] DEBUG: Seat seat0: Stopping session
[+468.33s] DEBUG: Seat seat0: Session stopped
[+468.33s] DEBUG: Seat seat0: Stopping display server, no sessions require it
[+468.33s] DEBUG: Seat seat0: Active display server stopped, starting greeter
[+468.33s] DEBUG: Seat seat0: Creating greeter session
[+468.33s] DEBUG: Seat seat0: Creating display server of type x
[+468.33s] DEBUG: Using VT 8
[+468.33s] DEBUG: Seat seat0: Starting local X display on VT 8
[+468.33s] DEBUG: XServer 1: Logging to /var/log/lightdm/x-1.log
[+468.33s] DEBUG: XServer 1: Writing X server authority to /run/lightdm/root/:1
[+468.33s] DEBUG: XServer 1: Launching X Server
[+468.33s] DEBUG: Launching process 861: /usr/bin/X :1 -seat seat0 -auth /run/lightdm/root/:1 -nolisten tcp vt8 -novtswitch
[+468.33s] DEBUG: XServer 1: Waiting for ready signal from X server :1
[+468.42s] DEBUG: Process 861 exited with return value 1
[+468.42s] DEBUG: XServer 1: X server stopped
[+468.42s] DEBUG: Releasing VT 8
[+468.42s] DEBUG: XServer 1: Removing X server authority /run/lightdm/root/:1
[+468.42s] DEBUG: Seat seat0: Display server stopped
[+468.42s] DEBUG: Seat seat0: Stopping session
[+468.42s] DEBUG: Seat seat0: Session stopped
[+468.42s] DEBUG: Seat seat0: Stopping display server, no sessions require it
[+468.42s] DEBUG: Seat seat0: Active display server stopped, starting greeter
[+468.42s] DEBUG: Seat seat0: Creating greeter session
[+468.42s] DEBUG: Seat seat0: Creating display server of type x
[+468.42s] DEBUG: Using VT 8
[+468.42s] DEBUG: Seat seat0: Starting local X display on VT 8
[+468.42s] DEBUG: XServer 1: Logging to /var/log/lightdm/x-1.log
[+468.42s] DEBUG: XServer 1: Writing X server authority to /run/lightdm/root/:1
[+468.42s] DEBUG: XServer 1: Launching X Server

then it repeats endlessly the sequence.
At +467.50s i ran dm-tool switch-to-greeter

Any suggestion is appreciated !

Thibault