Arch Linux

Duumbo

Member

Registered: 2023-05-10

Posts: 3

SDDM is able to start manually, but won't start automatically

SDDM can be started successfully through `#systemctl start sddm`, but won't start on boot,even with it enabled.
I am using the nouveau drivers.

#systemctl status sddm

● sddm.service - Simple Desktop Display Manager
     Loaded: loaded (/usr/lib/systemd/system/sddm.service; enabled; preset: >
     Active: active (running) since Tue 2025-01-21 22:09:57 EST; 5min ago
 Invocation: 0e1299effca94ef1817ad363950bd361
       Docs: man:sddm(1)
             man:sddm.conf(5)
   Main PID: 1225 (sddm)
      Tasks: 4 (limit: 38031)
     Memory: 112.4M (peak: 123.7M)
        CPU: 2.999s
     CGroup: /system.slice/sddm.service

Here's the output of "#journalctl -xeu sddm"
http://0x0.st/8HdT.txt
Here's the output of "#journalctl -b"
http://0x0.st/8HdM.txt

Here is the "/var/log/Xorg/0/log"
http://0x0.st/8HdB.txt

Here's the sddm.conf
http://0x0.st/8HdS.txt

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 75,494

Re: SDDM is able to start manually, but won't start automatically

1. you're running NM and dhcpcd in parallal - disable the latter
2. The journal is full of bus errors from your nvme

Jan 21 21:54:01 Geppetto kernel: pcieport 0000:00:06.0: AER: Correctable error message received from 0000:02:00.0
Jan 21 21:54:01 Geppetto kernel: nvme 0000:02:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (Receiver ID)
Jan 21 21:54:01 Geppetto kernel: nvme 0000:02:00.0:   device [144d:a80a] error status/mask=00000001/0000e000
Jan 21 21:54:01 Geppetto kernel: nvme 0000:02:00.0:    [ 0] RxErr                  (First)

3. You're not reaching the graphical.target what means you've likely configured the multi-user.target as default. 2nd link below
4. Not sure about the empty autologin user (or the SDDM autologin config at all) but

Jan 21 22:10:30 Geppetto sddm[1225]: Authentication for user  ""  failed

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libertepourmoi

Member

Registered: 2022-03-26

Posts: 16

Re: SDDM is able to start manually, but won't start automatically

I think it is normal that the values in the autologin section in the sddm config are empty, that just means there should not be any autologin.

One thing that strikes me as strange in your logs though is whether you want to use X or wayland. Because you run sddm under X in order to then load a KDE wayland session. Is that intentional? But then, I am not sure it is the cause of your problem.