Bug 396946

Summary:	Display corruption occurs if system is resumed from suspend/standby/sleep while monitor is off
Product:	[Plasma] kwin	Reporter:	Sandeep <sandy.8925>
Component:	general	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal	CC:	kde.org, kde, notuxius, sandy.8925
Priority:	NOR
Version First Reported In:	5.13.3
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Sandeep 2018-07-29 08:32:48 UTC

Details
-------
Linux version: 4.17.10
Plasma, kwin : 5.13.3
SDDM: 0.18.0

Plasma Wayland session, started from SDDM 

Steps to reproduce
------------------
* Suspend computer
* Turn off electrical power supply to monitor
* Resume computer
* Turn on electrical power supply to monitor


Observe display corruption - switching TTY's doesn't help either. Does not happen when using Gnome, with GDM or SDDM. Consistently occurs when using Plasma  on Wayland.

Comment 1 David Edmundson 2018-07-29 10:02:15 UTC

what gets corrupted? Please add a screenshot

Comment 2 Sandeep 2018-07-29 10:43:14 UTC

(In reply to David Edmundson from comment #1)
> what gets corrupted? Please add a screenshot

I can't take a screenshot, but will take a photo and attach it here.

Comment 3 Sandeep 2018-07-29 10:56:49 UTC

Here's a bunch of photos, and a video that shows the corruption I'm talking about - https://photos.app.goo.gl/ZEFEf3jA7u5r4Brw8

The system becomes unusable, but I am able to force a restart using Ctrl + Alt + PrtScr + REISUB

Comment 4 Sandeep 2018-08-04 15:55:20 UTC

I've provided the request info, please see my earlier comments.

Comment 5 Sandeep 2018-08-04 15:57:03 UTC

This also happens if the monitor is turned off, and then turned on while KDE is running.

Let me know if you need any other information.

Comment 6 Alexander Mentyu 2018-08-06 14:56:05 UTC

I noticed the sometimes similar display corruption appears in top left part of screen upon logging out from Wayland session with default Intel/NVIDIA video drivers on Yoga 520 laptop without using external display

Distribution: KDE neon Developer Edition
Kernel: 4.15.0-29-generic
Plasma: 5.13.80
Apps: 18.11.70
Qt: 5.11.1
Frameworks: 5.48.0

Comment 7 kde.org 2021-11-06 21:33:33 UTC

This issue report is quite old. Can you please confirm, that it still persists with KDE 5.23?

Comment 8 Sandeep 2021-11-06 22:25:28 UTC

It doesn't seem to happen anymore with recent KDE versions. I'm pretty sure it's no longer an issue. You can go ahead and close this bug.