lightdm crash/loop after recent 12.04 beta updates
Bug #971437 reported by
professordes
This bug report is a duplicate of:
Bug #946674: unity-greeter crashed with SIGSEGV in background_loader_ready_cb().
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This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
lightdm (Ubuntu) |
New
|
Undecided
|
Unassigned |
Bug Description
Lightdm is crashing/looping on two multi-monitor machines, one 64bit one 32bit, both Intel graphics. It had been stable on 12.04 beta1 and subsequent updates until beta2.
It is still possible to set an automatic login and get to a gui desktop on startup, but logging out after this goes back again to the crash/loop in lightdm.
1) release: 12.04 beta2 (upgraded initially from 11.10 to 12.04beta1)
2) package: lightdm 1.1.9-0ubuntu1
3) expected behaviour: lightdm greeter screen appears after startup allowing standard login
4) what happens: greeter screen briefly flashes up, then black screen (with cursor), and back to greeter ->loop
description: | updated |
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/var/log/ lightdm/ lightdm. log is full of stuff like this....
in particular:
[+8758.58s] DEBUG: Greeter start authentication for guest account
[+8759.00s] DEBUG: Session 19998 exited with return value 0
[+8759.00s] DEBUG: Greeter quit
------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- -----
[+8757.20s] DEBUG: Greeter authorized lightdm/ x-0-greeter. log lightdm/ lightdm- greeter- session /usr/sbin/ unity-greeter lightdm/ root/:0 lightdm/ x-0.log lightdm/ root/:0 lightdm/ root/:0 -nolisten tcp vt7 -novtswitch
[+8757.20s] DEBUG: Logging to /var/log/
[+8757.20s] DEBUG: Session 19998 running command /usr/lib/
[+8757.43s] DEBUG: Greeter connected version=1.1.9
[+8757.43s] DEBUG: Greeter connected, display is ready
[+8757.43s] DEBUG: New display ready, switching to it
[+8757.43s] DEBUG: Activating VT 7
[+8757.43s] DEBUG: Stopping greeter display being switched from
[+8758.58s] DEBUG: Greeter start authentication for guest account
[+8759.00s] DEBUG: Session 19998 exited with return value 0
[+8759.00s] DEBUG: Greeter quit
[+8759.00s] DEBUG: Failed to start greeter
[+8759.00s] DEBUG: Stopping display
[+8759.00s] DEBUG: Sending signal 15 to process 19994
[+8759.04s] DEBUG: Greeter closed communication channel
[+8759.62s] DEBUG: Process 19994 exited with return value 0
[+8759.62s] DEBUG: X server stopped
[+8759.62s] DEBUG: Removing X server authority /var/run/
[+8759.62s] DEBUG: Releasing VT 7
[+8759.62s] DEBUG: Display server stopped
[+8759.62s] DEBUG: Display stopped
[+8759.62s] DEBUG: Active display stopped, switching to greeter
[+8759.62s] DEBUG: Switching to greeter
[+8759.62s] DEBUG: Starting new display for greeter
[+8759.62s] DEBUG: Starting local X display
[+8759.62s] DEBUG: Using VT 7
[+8759.62s] DEBUG: Logging to /var/log/
[+8759.62s] DEBUG: Writing X server authority to /var/run/
[+8759.62s] DEBUG: Launching X Server
[+8759.62s] DEBUG: Launching process 20111: /usr/bin/X :0 -auth /var/run/
[+8759.62s] DEBUG: Waiting for ready signal from X server :0