Bug 246622 - Maximised windows leave a line of desktop background above panel with compositing enabled
Summary: Maximised windows leave a line of desktop background above panel with composi...
Status: RESOLVED DUPLICATE of bug 248570
Alias: None
Product: kwin
Classification: Plasma
Component: general (show other bugs)
Version: unspecified
Platform: Ubuntu Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2010-08-03 17:20 UTC by Ralf Jung
Modified: 2010-08-26 21:32 UTC (History)
1 user (show)

See Also:
Latest Commit:
Version Fixed In:


Attachments
A screenshot showing the issue (right half is with composite, left half without) (9.21 KB, image/png)
2010-08-03 17:21 UTC, Ralf Jung
Details

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Description Ralf Jung 2010-08-03 17:20:40 UTC
Version:           unspecified (using KDE 4.4.2) 
OS:                Linux

With composite enabled, when I maximise a window, a 1 pixel line of the desktop background is visible between the panel and the window. When I disable composite, that line is coloured in the background colour of the panel, so that it is perceived as part of the panel.

Reproducible: Always

Steps to Reproduce:
Just enable compositing and maximize a window. The effect might be hard to notice on some desktop backgrounds though.

Actual Results:  
The window is one pixel too narrow in height, leaving one pixel of desktop background visible (or the panel reports its height one pixel too high).
I attached a screenshot showing the effect: The left half has compositing disabled, the right one has it enabled. You can clearly see the black line which is coming from the desktop background.

Expected Results:  
The lowest window pixel should be directly above the panel.

OS: Linux (x86_64) release 2.6.32-24-generic
Compiler: cc

I am using the default Plasma style.
Comment 1 Ralf Jung 2010-08-03 17:21:36 UTC
Created attachment 49782 [details]
A screenshot showing the issue (right half is with composite, left half without)
Comment 2 Thomas Lübking 2010-08-03 17:46:04 UTC
attaching plasma since this is (if not intended) likely a panel bug (mismatch between the set and the visual strut)
Comment 3 Martin Flöser 2010-08-26 21:32:55 UTC

*** This bug has been marked as a duplicate of bug 248570 ***