Bug 508262 - SDDM not appearing after boot
Summary: SDDM not appearing after boot
Status: RESOLVED UPSTREAM
Alias: None
Product: kwin
Classification: Plasma
Component: general (other bugs)
Version First Reported In: 6.4.4
Platform: Arch Linux Linux
: NOR major
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2025-08-14 21:36 UTC by Kubek4155
Modified: 2025-08-15 04:35 UTC (History)
1 user (show)

See Also:
Latest Commit:
Version Fixed In:
Sentry Crash Report:


Attachments
The output of "systemctl status sddm" before restarting it (408.46 KB, image/jpeg)
2025-08-14 21:36 UTC, Kubek4155
Details
List of packages that were being updated (254.65 KB, image/png)
2025-08-14 21:38 UTC, Kubek4155
Details

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Description Kubek4155 2025-08-14 21:36:48 UTC
Created attachment 184091 [details]
The output of "systemctl status sddm" before restarting it

SUMMARY
After an update SDDM no longer appears on boot, only a white dash is there. The only way to make it appear is to restart it yourself with systemctl. 

SOFTWARE/OS VERSIONS
Linux:  6.16.0-arch2-1 (64-bit)
KDE Plasma Version: 6.4.4
KDE Frameworks Version: 6.17.0
Qt Version: 6.9.1

ADDITIONAL INFORMATION:
Reinstalling graphic drivers and SDDM did not help. Though nothing appears, "systemctl status sddm" states it has started successfully.
Comment 1 Kubek4155 2025-08-14 21:38:40 UTC
Created attachment 184092 [details]
List of packages that were being updated
Comment 2 TraceyC 2025-08-14 23:08:11 UTC
systemctl status sddm shows the service is enabled and running
The logs look normal, and indicate a session was opened for user sddm

Recategorizing as kwin for now since this might be a display related issue.


I'd like to ask a few questions to narrow down what might be causing this.

What appears on the screen when SDDM doesn't load? Do you see a mouse cursor at all or just a black screen?

Does this happen if you try to log into a Wayland session or does it only happen with X11?

Also, can you get journalctl logs beginning from the start of the login session and going until just after sddm fails to load?

Thanks.
Comment 3 TraceyC 2025-08-14 23:08:23 UTC
.
Comment 4 Antonio Rojas 2025-08-15 04:35:26 UTC
See https://bbs.archlinux.org/viewtopic.php?id=307580. This is unrelated to KDE.