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#1 2018-06-13 17:37:59

kgizdov
Package Maintainer (PM)
From: Edinburgh, UK
Registered: 2015-12-08
Posts: 113

Cannot get GDM GUI

Hi,

For a while, maybe a month now, I've been getting weird behaviour at login - GDM will not show me the login screen and I would have to reboot to get it to work - I assumed it was harmless as no scary errors were reported anywhere. This happened intermittently so far, however, since yesterday I could no longer make any GUI appear. The curious part is that I still could not spot any errors or failed units that will do this. I tried disabling Wayland as well, but it had no effect.Then suddenly, after I don't know how many reboots, I finally managed to see logind and enter a GUI. I'm completely baffled.

In all instances, systemctl did not show any failures.

$ systemctl --failed
0 loaded units listed. Pass --all to see loaded but inactive units, too.
To show all installed unit files use 'systemctl list-unit-files'.

Also, these are the logs from the most recent boot attempts that did not succeed to get GUI:

journalctl --boot - https://pastebin.com/T1jEn9rx
journalctl --boot + enabled Gnome debug mode - https://pastebin.com/q2QgHbGe

and this is the success one:
journalctl --boot - https://pastebin.com/2206JiDp

I am also including the last (successful) dmesg log here - https://pastebin.com/21nLEAuv

The only real difference I can see is that in the successful boot GDM actually crashed with a segfault and was restarted, plus gnome-tracker shows a bunch of non-fatal errors (which I believe are caused by the GDM restart). But maybe I am blind to the problem... Could anyone have a look as to what is causing this?

Another curious thing is that this problem is only apparent on my laptop (Dell XPS 9350 with Intel Haswell CPU + i915 GPU) and not on my desk machine (Intel Haswell CPU + NVIDIA GPU), but both have basically the same packages and configuration apart from the GPU drivers of course.

Any ideas on what to check?

Thanks in advance!

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