Bug 430898

Summary:	The KRunner window is sometimes bigger than it should be
Product:	[Plasma] kwin	Reporter:	simon.bra.ag
Component:	general	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED DOWNSTREAM
Severity:	normal	CC:	nate, plasma-bugs-null
Priority:	NOR
Version First Reported In:	5.20.4
Target Milestone:	---
Platform:	Debian testing
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	An image Breeze theme

Description simon.bra.ag 2020-12-28 12:34:53 UTC

Created attachment 134365 [details]
An image

BACKGROUND
I run KDE with i3-gaps. That means that I don't use the KDE compositor. I use picom, a specific fork which supports blurring.

OBSERVED RESULT
Sometimes when I start KRunner I can see that not only the window is blurred but also an area below is. I can click the blurred area below the window and using xprop, confirm that it is the KRunner window.

Here is an image: https://imgur.com/a/sk7gHyQ

EXPECTED RESULT
The window should only be the necessary size. The area below it should not be blurred or clickable.

SOFTWARE/OS VERSIONS
Operating System: Debian GNU/Linux
KDE Plasma Version: 5.20.4
KDE Frameworks Version: 5.77.0
Qt Version: 5.15.2
WM: i3-gaps
Compositor: picom

Comment 1 Alexander Lohnau 2020-12-29 15:42:07 UTC

I seem to remember, that there was supposed to be a shadow. Maybe that causes the blur. How does it behave if KRunner displays results?

Comment 2 simon.bra.ag 2020-12-29 15:56:31 UTC

When results appear the blur below the window disappears. When I clear the search box and the result disappears the blur never seems to come back.

I have yet to find a reliable way to reproduce this. So far I would guess it just happens about 1/2 to 1/4 of the time.

Thank you for responding!

Comment 3 Nate Graham 2021-01-05 15:32:35 UTC

Does the bug happen when you use the standard Breeze theme using your non-KWin compositor? Or does it only happen when using this blurry theme?

Comment 4 simon.bra.ag 2021-01-05 16:21:03 UTC

Created attachment 134579 [details]
Breeze theme

Comment 5 simon.bra.ag 2021-01-05 16:28:56 UTC

I'm not using a blurry theme I use a transparent theme (Maia Transparent). The blur is caused by the compositor (picom). 

I've tried switching to the Breeze theme, and the blurred area below KRunner is still present. This doesn't seem to be affected in any way by the theme. As far as I can tell the only way to get rid of this is to turn off blurring in picom.

I am wondering if this can be reproduced with KWin. I will try later.

Comment 6 Nate Graham 2021-01-05 16:39:50 UTC

Since it works with Breeze, this is almost certainly an issue with either the theme or the compositor, neither of which are KDE products in this case. I would be interested to know if it happens with KWin though. If it does, please re-open.