Bug 484808

Summary:	Unresponsive black screen when disconnecting external monitor with laptop lid closed
Product:	[Plasma] plasmashell	Reporter:	Gábor Katona <katonag>
Component:	general	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED WORKSFORME
Severity:	grave	CC:	adnan.mahinic, elliot, kde, kdedev, rodonile
Priority:	NOR
Version First Reported In:	6.0.4
Target Milestone:	1.0
Platform:	openSUSE
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Gábor Katona 2024-03-31 09:07:16 UTC

SUMMARY
I have my laptop connected to a USB-C dock with an external screen. When I disconnect the laptop from the dock with the laptop lid closed (so the external is the only screen) very often the result is a totally black screen on the laptop (without even mouse) and the laptop is totally unresponsive. Reconnecting to the hub does not solve, only long press power button helps. In some cases the result is only a black screen with mouse, when I can start a console and start plasmashell. Yes, it has to be started, because it is not running, at least kquitapp6 says this.

STEPS TO REPRODUCE
1. Disconnect the external screen with laptop lid closed.

OBSERVED RESULT
Unresponsive black screen or black screen with only mouse

EXPECTED RESULT
It should work normally.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: oopenSUSE Tumbleweed 20240326
(available in About System)
KDE Plasma Version: 6.0.3.
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.2

ADDITIONAL INFORMATION
seems very similar to bug476340

Comment 1 Leonardo 2024-04-11 14:35:20 UTC

Same problem on my side, also on tumbleweed

Comment 2 Gábor Katona 2024-05-10 07:17:39 UTC

I also have the following experience: Same laptop, USB-C dock with dual monitors connected. I send the laptop to sleep. After wakeup ALL screens are black and disconnecting the dock does not bring back the built-in screen.

I think this is the same bug, since sleep is essentially disconnecting the external monitor.

This practically renders sleep broken.

Comment 3 mahee1981_bw 2024-11-18 16:04:18 UTC

(In reply to Gábor Katona from comment #2)
> I also have the following experience: Same laptop, USB-C dock with dual
> monitors connected. I send the laptop to sleep. After wakeup ALL screens are
> black and disconnecting the dock does not bring back the built-in screen.
> 
> I think this is the same bug, since sleep is essentially disconnecting the
> external monitor.
> 
> This practically renders sleep broken.

I have the same issue. Are there any logs I need to produce to help solve this issue?

Comment 4 Elliot Gawthrop 2025-01-31 16:58:04 UTC

Same problem for me, also on Tumbleweed. Doesn't reproduce on X11. Happens nearly all the time on Wayland.

Comment 5 TraceyC 2025-07-10 20:42:02 UTC

(In reply to Gábor Katona from comment #0)

Is this problem still happening on your system with Plasma 6.4.2 or later?
If it is, can you confirm if this happens with X11 only or Wayland only or with both?

Thanks.

Comment 6 Bug Janitor Service 2025-07-25 03:46:42 UTC

🐛🧹 ⚠️ This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information, then set the bug status to REPORTED. If there is no change for at least 30 days, it will be automatically closed as RESOLVED WORKSFORME.

For more information about our bug triaging procedures, please read https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging.

Thank you for helping us make KDE software even better for everyone!

Comment 7 Bug Janitor Service 2025-08-09 03:46:48 UTC

🐛🧹 This bug has been in NEEDSINFO status with no change for at least 30 days. Closing as RESOLVED WORKSFORME.