Bug 383289 - Z fighting between plasma dialogs and highlighted window
Summary: Z fighting between plasma dialogs and highlighted window
Status: RESOLVED NOT A BUG
Alias: None
Product: kwin
Classification: Plasma
Component: effects-various (show other bugs)
Version: 5.10.4
Platform: openSUSE Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2017-08-08 16:50 UTC by Fabian Vogt
Modified: 2018-08-25 16:08 UTC (History)
1 user (show)

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Description Fabian Vogt 2017-08-08 16:50:12 UTC 
0. Enable window highlighting on hover
1. Open the system tray or the main menu
2. Hover over a window entry in the taskmanager

-> Z-fighting between the dialog and the highlighted window
Comment 1 Martin Flöser 2017-08-08 17:38:20 UTC 
Z-fighting in this situation means? Constant switching?
Comment 2 Fabian Vogt 2017-08-08 17:41:49 UTC 
(In reply to Martin Flöser from comment #1)
> Z-fighting in this situation means? Constant switching?

Flickering between the layers, yes. It's basically like opacity: rand(0, 1) on every redraw.
Comment 3 Vlad Zahorodnii 2018-07-12 12:54:32 UTC 
KWin doesn't use depth buffer so that's not possible to have Z-fighting.
What do you mean by Z-fighting?
Comment 4 Fabian Vogt 2018-07-12 13:37:11 UTC 
(In reply to Vlad Zagorodniy from comment #3)
> KWin doesn't use depth buffer so that's not possible to have Z-fighting.
> What do you mean by Z-fighting?

From what I can remember, it looked 100% like z fighting here.

I can't hightlight windows on wayland, so I can't reproduce the issue here unfortunately.
Comment 5 Vlad Zahorodnii 2018-08-25 16:08:05 UTC 
KWin doesn't use depth buffer. Thus, that's not possible to have Z-fighting.

If you're still able to reproduce this bug, please reopen it.