Bug 439956

Summary:	windows have parts cut out when focused with NVIDIA GPU
Product:	[Plasma] kwin	Reporter:	saunders
Component:	compositing	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED WORKSFORME
Severity:	normal	CC:	kde, nate
Priority:	NOR
Version First Reported In:	5.27.7
Target Milestone:	---
Platform:	Gentoo Packages
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description saunders 2021-07-16 19:39:56 UTC

SUMMARY
sometimes with firefox in the foreground and i focus/restore konsole it will not draw the full konsole window properly. it will look like a box-shaped chunk was cut out of it. i cannot reliably recreate this. somewhat similiar effect when you play a video fullscreen with mpv (also hw accel) on the same desktop, it closes, firefox will momentarily be a black window before it refreshes.

STEPS TO REPRODUCE
1. firefox in foreground
2. restore a minimized konsole which overlays part of firefox
3. a box sized chunk will be cut out of konsole, it does not match the position it overlays firefox nor the size.

OBSERVED RESULT
konsole window drawn with square chunk missing.

EXPECTED RESULT
konsole window drawn properly.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 5.22.3
KDE Frameworks Version: 5.84.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION
desktop effects enabled, nvidia gtx 980, firefox hw accel enabled.

if I catch it doing it again I'll take a photo with my phone. it's rare but it has happened recently. it seems to only happen with konsole.

Comment 1 Nate Graham 2021-08-03 16:57:53 UTC

Cannot reproduce with Intel HD620 iGPU. Seems like it could be an NVIDIA issue.

Comment 2 saunders 2021-11-09 01:18:14 UTC

Had this happen again and this time I was able to recreate the secret sauce for having it happen every time.

compositor enabled, nvidia drivers.
open firefox, not maximized.
open konsole, position konsole over firefox. half over it, half over open desktop.
shade the konsole.
minimize konsole to taskbar by clicking on the taskbar entry.
restore konsole from clicking taskbar entry.
konsole not drawn properly.

if you cannot recreate this I can make a video.

Comment 3 David Edmundson 2023-09-06 10:38:14 UTC

This bug was reported against an outdated version of KWin. We have made many changes since the. 
If the issue persists in newer versions can you reopen the bug report updating the version number.

Comment 4 saunders 2023-09-06 15:23:15 UTC

Just tried it again with ver 5.27.7-r2 on Gentoo. Can still recreate this bug using the steps listed previously. Nvidia drivers 535.104.05

Comment 5 David Edmundson 2024-06-04 10:03:33 UTC

I know I've written this before, but everything still looks like a driver issue given we have no other reports.

This bug was reported against an outdated version of KWin. We have made many changes since then. 
If the issue persists in newer versions can you reopen the bug report updating the version number.

Comment 6 Bug Janitor Service 2024-06-19 03:47:06 UTC

Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

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

Comment 7 Bug Janitor Service 2024-07-04 03:47:34 UTC

This bug has been in NEEDSINFO status with no change for at least
30 days. The bug is now closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

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