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#1 2018-06-24 17:54:18

lightdm.failure
Member
Registered: 2018-06-24
Posts: 2

[SOLVED] lightdm failure at boot

After doing a full system upgrade, I'm stuck on a black screen when booting.

Switching to another tty and running

 systemctl list-units --failed 

I see that lightdm is the only unit that has failed. Running

 journalctl -b --unit 

I get the following output:

Service hold-off time over, scheduling restart.
lightdm.service: Stopped Light Display Manager.
Starting Light Display Manager...
Started Light Display Manager.
lightdm.service: Main process exited, code=exited, status=1/FAILURE
lightdm.service: Failed with result 'exit-code'
lightdm.service: Service hold-off time over, scheduling restart.
lightdm.service: Scheduled restart job, restart counter is at 5
Stopped Light Display Manager.
lightdm.service: Start request repeated too quickly.
lightdm.service: failed with 'exit-code'.
Failed to start Light Display Manager

Last edited by lightdm.failure (2018-06-25 14:50:29)

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#2 2018-06-24 18:07:27

loqs
Member
Registered: 2014-03-06
Posts: 9,232

Re: [SOLVED] lightdm failure at boot

Welcome to the arch linux forums lightdm.failure.  Please provide the pacman.log from the update which will contain all the packages changed during the update.
Please also provide the contents of /var/log/lightdm/lightdm.log and /var/log/Xorg.0.log.

Last edited by loqs (2018-06-24 18:08:03)

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#3 2018-06-24 18:08:26

robg
Member
Registered: 2015-03-05
Posts: 211

Re: [SOLVED] lightdm failure at boot

Please post the output of `systemctl status lightdm.service`. Also, details about your graphics setup should help; please provide the outputs of `lspci`, `dmesg` and any kernel parameters you are booting with. On a side-note, to isolate the issue, have you tried starting X (assuming you're not on Wayland) without a graphical login manager, e.g., via startx?

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#4 2018-06-24 18:09:09

Slithery
Forum Moderator
From: Norfolk, UK
Registered: 2013-12-01
Posts: 3,493

Re: [SOLVED] lightdm failure at boot

And also provide the output from the troubleshooting steps in the wiki...
https://wiki.archlinux.org/index.php/Sy … leshooting


No, it didn't "fix" anything. It just shifted the brokeness one space to the right. - jasonwryan
Closing -- for deletion; Banning -- for muppetry. - jasonwryan

aur - dotfiles

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#5 2018-06-24 18:12:58

loqs
Member
Registered: 2014-03-06
Posts: 9,232

Re: [SOLVED] lightdm failure at boot

Slithery you are certain lightdm.service provides more than the following in the journal?

lightdm.service: Main process exited, code=exited, status=1/FAILURE

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#6 2018-06-25 05:26:17

Skunky
Member
Registered: 2018-01-25
Posts: 136

Re: [SOLVED] lightdm failure at boot

Happened in my laptop too when using xfce4/mate with nvidia drivers, i had to use generic drivers or gnome DE

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#7 2018-06-25 14:49:53

lightdm.failure
Member
Registered: 2018-06-24
Posts: 2

Re: [SOLVED] lightdm failure at boot

For future readers I FIXED this by removing the nvidia dkms package:

 sudo pacman -Rs nvidia-390xx-dkms 

the dkms is a support that handles the modules that generally reside outside the kernel source tree to be automatically rebuild when the kernel is upgraded. You will not die without the dkms.
Then reinstall your graphics driver:

 sudo pacman -S nvidia-390xx 

and

 reboot 

NOTE be sure to install your own driver version.

Last edited by lightdm.failure (2018-06-25 14:51:37)

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