Bug 447632

Summary:	KDE/Plasma compositing issue: Transparent Firefox & Truly dark theme for Sublime Merge
Product:	[Plasma] kwin	Reporter:	ratijas <me>
Component:	compositing	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED WORKSFORME
Severity:	normal	CC:	kdedev
Priority:	NOR
Version First Reported In:	git master
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	KMail too

Description ratijas 2021-12-29 10:07:05 UTC

SUMMARY

KWin, video driver, or whatever is responsible for this… I don't know. But the thing is, Firefox window may become transparent under certain conditions (or just because it feels like it); Sublime Merge window content becomes black under other certain conditions; icons, textures, and whole window surfaces may contain garbage pixels after sleep, and so on…

I took a video depicting the process:

https://youtu.be/hFeFBrDVUy0

STEPS TO REPRODUCE

1. Launch Firefox
2. Hover over its icon in the task manager
3. Hover over the window preview on a tooltip of its icon

OBSERVED RESULT

Firefox's window may become transparent. Its server-side decorations are in place. Hovering over, or interacting with the window (where it's supposed to be) brings its graphics back to normal. But otherwise it is fully transparent; you can see things going on behind it.

EXPECTED RESULT

Obviously, this should not happen.

SOFTWARE/OS VERSIONS

Operating System: Arch Linux
KDE Plasma Version: 5.23.4
KDE Frameworks Version: 5.90.0
Qt Version: 5.15.2
Kernel Version: 5.15.11-arch2-1 (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i7-6700HQ CPU @ 2.60GHz
Memory: 15.6 GiB of RAM
Graphics Processor: NVIDIA GeForce GTX 970M/PCIe/SSE2

Firefox: 95.0.2-1
Everything KDE related is from git master

Comment 1 ratijas 2022-08-21 13:18:44 UTC

Created attachment 151476 [details]
KMail too

Seems like it's not exclusive to Firefox. KMail also can become transparent. Which leads me to think that it's a KWin's fault after all.

Comment 2 TraceyC 2025-04-02 17:50:19 UTC

Are you still seeing this on Plasma 6.3.3 or greater? I can't currently reproduce this, it's probably been fixed. Thanks.

Comment 3 Bug Janitor Service 2025-04-17 03:46:58 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 4 Bug Janitor Service 2025-05-02 03:47:31 UTC

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