Bug 356562 - When I open windows, I see the window decoration before the window contents.
Summary: When I open windows, I see the window decoration before the window contents.
Status: RESOLVED NOT A BUG
Alias: None
Product: kwin
Classification: Plasma
Component: general (show other bugs)
Version: 5.5.0
Platform: Arch Linux Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL: https://www.youtube.com/watch?v=OO1db...
Keywords:
: 358433 (view as bug list)
Depends on:
Blocks:
 
Reported: 2015-12-12 15:32 UTC by Michael Davies
Modified: 2016-01-23 17:29 UTC (History)
2 users (show)

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Description Michael Davies 2015-12-12 15:32:34 UTC 
I have recently installed Arch (just before Plasma 5.5.0 was released) and since upgrading to Plasma 5.5.0 I have noticed a small issue:  When I open a new window, the window decoration appears before the window contents.  See this short video I uploaded to show the issue.  This bug wasn't present on the previous Plasma desktop version (5.4.3?).  I also checked to see if the issue was specific to my laptop hardware (intel graphics), but my desktop PC (radeon graphics) exhibits the same issue.

Others seem to be suffering from the same issue as well - https://www.reddit.com/r/kde/comments/3wfn8a/kde_plasma_55_issue_when_i_open_windows_i_see_the/

It also seems like the problem only affects Qt based windows - GTK3 applications don't have the same problem under Plasma desktop 5.5.0.

Apologies if this bug has been submitted before, but I couldn't find an appropriate bug within the bug tracker.

Reproducible: Always

Steps to Reproduce:
1. Open a qt based window

Actual Results:  
The window decoration appears before the window contents.

Expected Results:  
Window decorations and contents appear at the same time,
Comment 1 Thomas Lübking 2015-12-12 17:08:45 UTC 
No idea whether this is https://marc.info/?l=kwin&m=137819817828359&w=2 again or it's just broken in Qt5, but the windows don't support _NET_WM_SYNC_REQUEST_COUNTER (There's none when running openbox as WM either, so this is probably just broken in Qt5)

INVALID because it's not in kwin or its dependencies, the client is just broken (doesn't mean this isn't a bug in Qt)
Comment 2 Thomas Lübking 2015-12-12 17:27:15 UTC 
https://bugreports.qt.io/browse/QTBUG-49931
Comment 3 Martin Flöser 2015-12-14 07:51:49 UTC 
There's a code review for it: https://codereview.qt-project.org/#/c/140608/
Comment 4 Thomas Lübking 2015-12-14 08:40:47 UTC 
Ah, thanks.
Comment 5 Thomas Lübking 2016-01-23 17:29:58 UTC 
*** Bug 358433 has been marked as a duplicate of this bug. ***