LightDM fail after kernel upgrade

sevendogs · 2016-02-04 19:35:17

I searched for this topic and didn't find anyone having this issue, thought I would post to see if anyone else has and get some ideas on a solution. A couple of days ago I did a pacman -Syu and got both a kernel update and NVidia driver update. I updated everything and restarted the machine. LightDM did not come up and looking at the systemctl status messages for lightdm did not reveal anything. I initially thought the Nvidia driver update was beyond what my card (GTX560) would handle but when I restarted the machine in fallback mode, lightdm worked fine and the running NVidia driver and kernel version were what I updated to. I implemented the lightdm.conf entry that forces lightdm to wait until X loads just in case that was causing the issue. After restarting the machine (not in fallback mode), all was well.

This morning I got another update to the kernel and kernel headers, did the update and restarted. LightDm failed again so I just restarted normally and the system came up fine. Seems like after the initial restart after a kernel upgrade, lightdm is failing for some reason. If I restart twice, the system is fine. I don't know definitively if the kernel upgrade is associated but there has been two kernel upgrades in the past week and both times it failed. Could be a coincidence, who knows.

Thoughts or log files I should look at to further investigate?

Thanks in advance.

Paul

sevendogs · 2016-02-09 19:54:10

Just did another pacman -Syu and this was upgraded. Same behavior, lightdm failed until reboot. I did change the "logind-check-graphical=true" in lightdm - apparently it toggled after the last 2 lightdm upgrades.

[2016-02-09 13:23] [ALPM] upgraded nvidia-libgl (361.18-2 -> 361.28-1)
[2016-02-09 13:23] [ALPM] upgraded nvidia-utils (361.18-2 -> 361.28-1)
[2016-02-09 13:23] [ALPM-SCRIPTLET] If you run into trouble with CUDA not being available, run nvidia-modprobe first.
[2016-02-09 13:23] [ALPM] upgraded lib32-nvidia-utils (361.18-1 -> 361.28-1)
[2016-02-09 13:23] [ALPM] upgraded lib32-nvidia-libgl (361.18-1 -> 361.28-1)
[2016-02-09 13:23] [ALPM] upgraded nvidia-dkms (361.18-3 -> 361.28-1)
[2016-02-09 13:23] [ALPM-SCRIPTLET] 
[2016-02-09 13:23] [ALPM-SCRIPTLET] Creating symlink /var/lib/dkms/nvidia/361.28/source ->
[2016-02-09 13:23] [ALPM-SCRIPTLET]                  /usr/src/nvidia-361.28
[2016-02-09 13:23] [ALPM-SCRIPTLET] 
[2016-02-09 13:23] [ALPM-SCRIPTLET] DKMS: add completed.
[2016-02-09 13:23] [ALPM-SCRIPTLET] ==> To build and install your modules run: dkms install nvidia/361.28
[2016-02-09 13:23] [ALPM-SCRIPTLET] ==> To do this automatically at startup run: systemctl enable dkms.service
[2016-02-09 13:23] [ALPM] transaction completed

Still stumped but I know the solution, bounce the box twice after an update. Will post back after (if) I figure this out.

jasonwryan · 2016-02-09 20:00:27

Not a Sysadmin issue, moving to Apps and DEs...

Arch Linux

#1 2016-02-04 19:35:17

LightDM fail after kernel upgrade

#2 2016-02-09 19:54:10

Re: LightDM fail after kernel upgrade

#3 2016-02-09 20:00:27

Re: LightDM fail after kernel upgrade

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