Bug 468061

Summary:	Flashing content of modal GTK dialogs (e.g. messageboxes, opensave dialogs., parameters dialogs etc) if 'breeze' window decoration is enabled.
Product:	[Plasma] kwin	Reporter:	painless roaster <painless.roaster>
Component:	compositing	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED WORKSFORME
Severity:	normal	CC:	kwin-bugs-null, nate, uhhadd
Priority:	NOR
Version First Reported In:	5.27.3
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	example of flashing

Description painless roaster 2023-04-02 08:29:44 UTC

Flashing of the contents of GTK modal dialogs (e.g. messageboxes, opensave dialogs., parameters dialogs etc) if 'breeze' window decoration is enabled.

Only the window background around widgets seems to flash. The flickering does not always occur, but about a third of the time when windows are open.

If the 'oxygen' decoration is enabled, the flickering stops. Flickering in 'breeze' does not occur if the compositor is turned off. Only GTK modal dialogs flash.

Comment 1 painless roaster 2023-04-02 08:36:00 UTC

Created attachment 157785 [details]
example of flashing

Comment 2 painless roaster 2023-04-02 08:49:21 UTC

I'm just now realizing the connection. It seems that the flickering only occurs if I have specified in the color definition that the color of the active header is the same as the background color of the window.

I have a suggestion: the Breeze decoration actively modifies the color scheme of the open windows. There is an attempt to apply the header color to the menu and tabbar content. That feature should probably be suppressed if the header color is the same as the background color.

Comment 3 Nate Graham 2023-04-03 20:07:57 UTC

Can you clarify what exactl set of settings triggers the bug, and verify that other settings don't? If a particular color scheme file can trigger the bug, can you attach it? It should live in ~/.local/share/color-schemes/

Comment 4 painless roaster 2023-04-06 17:37:06 UTC

So I was wrong. Adjusting the color scheme doesn't solve the problem. For now, the solution seems to be to use the 'oxygen' decoration instead of 'breeze'.
I remind you that only the modal dialogs of gtk applications are causing the problem.

Comment 5 Bug Janitor Service 2023-04-21 03:45:49 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 6 Bug Janitor Service 2023-05-06 03:46:17 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!