Bug 448697

Summary:	kwin_wayland crash when it turns off and turn on the screen monitor
Product:	[Plasma] kwin	Reporter:	smgog3476
Component:	wayland-generic	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED FIXED
Severity:	crash	CC:	kde, kwin-bugs-null, nate, nicolas.fella
Priority:	NOR
Version:	5.23.5
Target Milestone:	---
Platform:	Kubuntu
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:
Attachments:	This file contains the debug information of the kwin_wayland using the coredumpctl

Description smgog3476 2022-01-18 10:32:57 UTC

Created attachment 145606 [details]
This file contains the debug information of the kwin_wayland using the coredumpctl

SUMMARY
***
NOTE: If you are reporting a crash, please try to attach a backtrace with debug symbols.
See https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports
***


STEPS TO REPRODUCE
1. Load session with wayland protocol
2. Open some programs(optionaly)
3. Shutdown the screen or let the screen enters in rest mode
4. Turn on the screen and the crash triggers

OBSERVED RESULT
All opened windows in the session disappear  and multiple crash warnings in the clipboard content

EXPECTED RESULT


SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 5.13.0-25-generic Linux kernel
(available in About System)
KDE Plasma Version: 5.23.5
KDE Frameworks Version: 5.90.0
Qt Version: 5.12.2

ADDITIONAL INFORMATION
* Graphical card: NVIDIA GeForce RTX 2080 SUPER
* processor: Intel i7-9700K (8) @ 4.900GHz
* RAM: 16GB
* GPU Driver: NVIDIA 470.86
* Distribution: Kubuntu 21.10 x86_64
* Monitor resolution: 1920x1080

NOTE: I opened a report before with the same problem but with the notifier and they told me that the problem are laying with the kwin_wayland. The report ID is 448648

Comment 1 Bug Janitor Service 2022-01-18 11:18:19 UTC

A possibly relevant merge request was started @ https://invent.kde.org/plasma/kwin/-/merge_requests/1905

Comment 2 Nate Graham 2022-01-18 21:36:44 UTC

Git commit e0a8fa778e3dce508695155c7d5a9a1e0bddd9f8 by Nate Graham, on behalf of Xaver Hugl.
Committed on 18/01/2022 at 21:36.
Pushed by ngraham into branch 'master'.

backends/drm: fix output changes with the placeholder output

As the placeholder output gets added or removed in response to other outputs
getting enabled or disabled, the output list may change while iterating over
them and applying changes.
Related: bug 448454, bug 448474
FIXED-IN: 5.24

M  +7    -3    src/backends/drm/drm_backend.cpp

https://invent.kde.org/plasma/kwin/commit/e0a8fa778e3dce508695155c7d5a9a1e0bddd9f8

Comment 3 Nate Graham 2022-01-18 21:37:49 UTC

Git commit 24dc3abe918cde9007e19c4351e5778480f5bb75 by Nate Graham, on behalf of Xaver Hugl.
Committed on 18/01/2022 at 21:37.
Pushed by ngraham into branch 'Plasma/5.24'.

backends/drm: fix output changes with the placeholder output

As the placeholder output gets added or removed in response to other outputs
getting enabled or disabled, the output list may change while iterating over
them and applying changes.
Related: bug 448454, bug 448474
FIXED-IN: 5.24


(cherry picked from commit e0a8fa778e3dce508695155c7d5a9a1e0bddd9f8)

M  +7    -3    src/backends/drm/drm_backend.cpp

https://invent.kde.org/plasma/kwin/commit/24dc3abe918cde9007e19c4351e5778480f5bb75

Comment 4 David Edmundson 2022-01-19 15:32:49 UTC

The relevant area has received a lot of changes. The backtrace unfortunately lacks enough to be confident. Please file a new bug report if you have issues on 5.24.0