Bug 448806

Summary:	Plasma loads into a black screen when logging out and back in when using systemd startup
Product:	[Plasma] plasmashell	Reporter:	Samuel Reddy <samuelsumukhreddy>
Component:	general	Assignee:	David Edmundson <kde>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	nate, nyanpasu64, plasma-bugs-null
Priority:	NOR	Keywords:	regression, usability
Version First Reported In:	5.23.90
Target Milestone:	1.0
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Samuel Reddy 2022-01-20 03:13:39 UTC

SUMMARY:
If you log out of Plasma and log back in, Plasma will take a long to load and it loads into a black screen with no panel or desktop icons, you can still use krunner though. This happens on both Wayland and X11

STEPS TO REPRODUCE:
1. Log into Plasma
2. Log out of Plasma
3. Repeat step one 
4. Black Screen

OBSERVED RESULT:
Plasma loads into a black screen

EXPECTED RESULT:
Plasma should load a normal desktop

SOFTWARE/OS VERSIONS:
Operating System: Arch Linux
KDE Plasma Version: 5.23.90
KDE Frameworks Version: 5.90.0
Qt Version: 5.15.2
Kernel Version: 5.16.1-arch1-1 (64-bit)
Graphics Platform: Wayland
Processors: 8 × AMD Ryzen 5 3450U with Radeon Vega Mobile Gfx
Memory: 5.7 GiB of RAM
Graphics Processor: AMD Radeon Vega 8 Graphics

Comment 1 nyanpasu64 2022-01-20 10:56:24 UTC

I got this on X11, on 5.23.90, with https://invent.kde.org/plasma/kwin/-/merge_requests/1916 manually applied to my system. The system hung at the splash screen for a long time (without the right X11 font DPI set), then loaded into a black screen with only a mouse cursor and krunner (without the font DPI), where I could open Konsole (also without the font DPI).

journalctl log at https://invent.kde.org/-/snippets/2051.

I tried it again. logout, login, my system hung on SDDM with a grayed-out password, the mouse could move, I couldn't interact with SDDM, it wouldn't advance to the splash screen. IIRC pressing Caps Lock wouldn't toggle the light. A minute or so later, it advanced to a black screen *without* a working krunner (alt+f2 and alt+space did nothing).

journalctl log at https://invent.kde.org/-/snippets/2052. It's strange how it took nearly 2 minutes from "org.kde.LogoutPrompt" to "Reached target Exit the Session." And i swear i logged out, reached sddm, and tried to log back in faster than that.

Comment 2 Nate Graham 2022-01-20 16:29:09 UTC


*** This bug has been marked as a duplicate of bug 448492 ***