Bug 2524940 - Black screen instead of the login screen after plasma-login-manager crashed in PlasmaQuick::QuickViewSharedEngine
Summary: Black screen instead of the login screen after plasma-login-manager crashed i...
Keywords:
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: plasma-login-manager
Version: 45
Hardware: x86_64
OS: Linux
unspecified
urgent
Target Milestone: ---
Assignee: Neal Gompa
QA Contact:
URL:
Whiteboard: RejectedBlocker
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-27 12:37 UTC by Steve Cossette
Modified: 2026-09-07 09:14 UTC (History)
6 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Type: Bug
Embargoed:


Attachments (Terms of Use)
system log (595.62 KB, text/plain)
2026-08-27 12:52 UTC, Steve Cossette
no flags Details
Full backtrace (85.36 KB, text/plain)
2026-08-27 20:36 UTC, Steve Cossette
no flags Details


Links
System ID Private Priority Status Summary Last Updated
KDE Software Compilation 524819 0 NOR UNCONFIRMED Black screen instead of the login screen after plasma-login-manager crashed in PlasmaQuick::QuickViewSharedEngine 2026-08-27 20:49:47 UTC

Description Steve Cossette 2026-08-27 12:37:37 UTC
When logging on my test computer this morning, I see the login screen for a split second, then it transitions to black. Usually, it transitions from black to the login screen, so this seems to happen backwards now oddly. 

After this happens, all I am left is a cursor. I effectively had to drop to TTY and run startplasma-wayland to get to my desktop.

Comment 1 Fedora Blocker Bugs Application 2026-08-27 12:39:36 UTC
Proposed as a Blocker for 45-beta by Fedora user farchord using the blocker tracking app because:

 When booting Fedora KDE, the screen completely goes black, making it impossible for a normal user to get to their desktop.

Side note: The system isn't frozen, you can drop to tty and run startplasma-wayland to get to your desktop.

Comment 2 Steve Cossette 2026-08-27 12:48:50 UTC
Okay Seems this is intermittent and doesn't always happen. I'll try to record it, but I tried 4-5 reboots in a row, some being from a cold boot and it doesn't happen... And I was able to make it happen twice in a row, maybe I got lucky?

Comment 3 Steve Cossette 2026-08-27 12:52:02 UTC
Created attachment 2155808 [details]
system log

Comment 4 Steve Cossette 2026-08-27 12:53:57 UTC
I also see the crash in drkonqi but honestly not too sure how to make it spit out the information you need.

Comment 5 Derek Enz 2026-08-27 16:41:46 UTC
Steve so far for me on my Thinkpad I cant repo the issue.

Comment 6 Adam Williamson (Red Hat non-Fedora) 2026-08-27 19:17:34 UTC
Huh. This is the failure mode openQA was seeing yesterday, that seemed to go away after I forced a regen of the f46 buildroot.

Note your journal has a crash in it:

Aug 27 08:25:58 steve-desktop systemd-coredump[2587]: Process 2374 (plasma-login-gr) of user 965 dumped core.

I saw this in openQA too.

Comment 7 Steve Cossette 2026-08-27 20:28:04 UTC
Yep it's incredibly random.

Machine info:

Ryzen 9 9900x3d
128gb ram
Radeon 9070xt

Let me know if you need more

Comment 8 Steve Cossette 2026-08-27 20:36:11 UTC
Created attachment 2155846 [details]
Full backtrace

Full backtrace, hopefully it helps

Comment 9 Derek Enz 2026-08-27 22:19:49 UTC
Ok so far one of my Thinkpads which is Intel is going good. My main AMD system is looking good.

Since its sporadic will keep on it.

Adam didn’t Kamil find some issue with the Ryzen 9 cards awhile back?

Comment 10 Adam Williamson (Red Hat non-Fedora) 2026-08-27 22:33:12 UTC
I don't think this is that.

I don't know if this is as simple as "works on hardware X / doesn't work on hardware Y". I think it's more "sometimes it works, sometimes it doesn't" and we don't know the key factor yet...

Comment 11 Geraldo Simião 2026-08-31 04:21:02 UTC
someone added this comment at the bloccker status discussion:
https://forge.fedoraproject.org/quality/blocker-review/issues/2153#issuecomment-1351239

Comment 12 Lukas Ruzicka (Red Hat) 2026-08-31 17:51:34 UTC
AGREED Delayed Decision (Punt)

Discussed at the 2026-08-31 (blocker / freeze exception) review meeting:

Though this bug has a lot of ticket votes, the situation seems unclear. Neal and Derek can't reproduce it. openQA only hit it briefly then stopped hitting it after a buildroot regeneration was forced. It is not happening on openQA compose tests either. Two other folks besides Steve claim to have hit it, but it is not clear that the cases are the same.

https://meetbot-raw.fedoraproject.org//blocker-review_matrix_fedoraproject-org/2026-08-31/f45-blocker-review.2026-08-31-16.01.log.txt

Comment 13 Adam Williamson (Fedora) 2026-09-02 17:21:47 UTC
So can folks who think they're hitting this please provide more details? Let's see:

1) Is your system fully up-to-date with current Fedora 45?
2) Does the problem always happen, or only sometimes?
3) Can you please attach the journal messages from a failed boot (aside from Steve, who already did)?

Comment 14 Steve Cossette 2026-09-02 17:53:18 UTC
To answer my share of the questions regarding the logs I posted:

1) Yep, or it was at the time
2) Very seldomly. It happened twice in a row (Two fresh reboots in a row) and then I tried to replicate it, and never succeeded in repeating it since.

Comment 15 Geraldo Simião 2026-09-04 03:00:16 UTC
I have faced this only one time, and after a distro-sync (my f45 came from a f44 upgrade) and a reboot all was just fine and never hit the bug again. 
I'm trying to reproduce it in the new Beta 1.2 KDE iso but until now nothing buggy happens.

Comment 16 Kamil Páral 2026-09-07 09:14:06 UTC
Rejected as a Beta blocker. See https://forge.fedoraproject.org/quality/blocker-review/issues/2153


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