Public bug reported:
I have a number of usr-written applications that involve drawing Arcs. The
applications are written in
C, using direct X11 calls, and Java, using AWT interface. When updating the
graphics on screen, arcs
get clipped where they shouldn't. I have come to the conclusion that this
happens when another
window is being help at the top layer of the stack, e.g. a window flagged as
'Always on Top', a
Java dialog window or a Gnome notification popup. The clipping appears to treat
the 'on top'
window as if it covers the full width of the screen. Once the window is moved
away, refreshing
the window causes the arcs to draw properly. The clipping only affects Arcs,
lines and text are
not affected.
I should add that my C applications do not use clipping, and refresh simply
redraws the whole of
the window - no attempt is made to refresh only the areas exposed. The
applications all used to work
under much earlier versions, e.g Ubuntu 8.04, but I can't say exactly when the
bug appeared.
My laptop is an Acer Extensa 5630E if that helps.
I'd be grateful for any advice on circumventing this bug, and would be happy to
assist in providing
further information when required.
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: metacity 1:2.34.1-1ubuntu4.1
ProcVersionSignature: Ubuntu 3.0.0-17.30-generic 3.0.22
Uname: Linux 3.0.0-17-generic i686
ApportVersion: 1.23-0ubuntu4
Architecture: i386
Date: Thu Apr 5 10:06:11 2012
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
SourcePackage: metacity
UpgradeStatus: Upgraded to oneiric on 2012-02-19 (45 days ago)
** Affects: metacity (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386 oneiric
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https://bugs.launchpad.net/bugs/974079
Title:
Window manager clips X11 arcs wrongly
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