Arch Linux

tofiffe

Member

Registered: 2016-02-14

Posts: 38

[Solved] GDM fails to start as of gnome 49 update

I have 2 setups, one on laptop and one on a PC, both running arch and GNOME with wayland and nvidia GPUs.

My laptop seems to work perfectly fine with the latest update, however on PC GDM fails to start, but the rest of gnome seems to work fine if started for example with lightdm.

During startup I see multiple messages like so:

Stopping User Runtime Directory /run/user/60584...
Stopped User Runtime directory /run/user/60584.
Removed slice User Slice of UID 6084
Started Process Core Dump (PID 2605/UID 0).

repeated multiple times, just with different numbers. I've enabled debugging in custom.conf:

cat /etc/gdm/custom.conf 
[daemon]
#WaylandEnable=false

[debug]
Enable=true

and it resulted in this log: https://pastebin.com/CN9nF2cT which makes it seem like the greeter is exiting and gdm attempts to create and kill processes, sessions etc, but no clue on what's going on, what can I do to fix this?

Last edited by tofiffe (2025-10-19 15:15:55)

seth

Member

From: Don't DM me only for attention

Registered: 2012-09-03

Posts: 73,158

Re: [Solved] GDM fails to start as of gnome 49 update

and nvidia GPUs

Remove the debug output, reboot, and then please post your complete system journal for the boot:

sudo journalctl -b | curl -F 'file=@-' 0x0.st

(Generally please *never* use -x, it's pure spam)

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How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc

tofiffe

Member

Registered: 2016-02-14

Posts: 38

Re: [Solved] GDM fails to start as of gnome 49 update

Ok, here's the log: https://0x0.st/K1KO.txt

Note that at the end I switch to a different tty and start lightdm to log in.

Last edited by tofiffe (2025-10-19 15:06:21)

seth

Member

From: Don't DM me only for attention

Registered: 2012-09-03

Posts: 73,158

Re: [Solved] GDM fails to start as of gnome 49 update

Oct 19 16:53:57 fenriz unix_chkpwd[1301]: could not obtain user info (gdm-greeter)
Oct 19 16:53:57 fenriz (systemd)[1276]: user@60578.service: PAM failed: Authentication service cannot retrieve authentication info
Oct 19 16:53:57 fenriz (systemd)[1276]: user@60578.service: Failed to set up PAM session: Operation not permitted
Oct 19 16:53:57 fenriz (systemd)[1276]: user@60578.service: Failed at step PAM spawning /usr/lib/systemd/systemd: Operation not permitted

https://bbs.archlinux.org/viewtopic.php … 5#p2263495

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How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc

tofiffe

Member

Registered: 2016-02-14

Posts: 38

Re: [Solved] GDM fails to start as of gnome 49 update

Welp, that did the trick, thanks!