Red Hat Bugzilla – Bug 87916
Random dropout of OpenGL triangles in Radeon DRI
Last modified: 2007-04-18 12:52:44 EDT
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Description of problem:
When drawing solid-color circles made using GL_TRIANGLE_FAN,
one of the triangle segments is occasionally not drawn.
It may occur in cases other than a solid-color triangle fan;
I have not tested it.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Compile and run the attached test app on a Radeon display.
Actual Results: The GLUT test program repeatedly draws a solid green filled circle
with a trangle fan. Intermittently, one of the triangle segments is
Expected Results: A filled, solid green circle, with no dropouts.
The problem disappears if run without DRI. The position of the
dropped triangle migrates in a defined way, suggesting it may be a problem that
results from the positon of the vertex or triangle
in some internal buffer.
Created attachment 90874 [details]
Draws a filled green circle using GLUT.
Created attachment 90875 [details]
XFree86 log file
Please report this problem also upstream in XFree86's bugzilla so that the
DRI project is aware of the problem: http://bugs.xfree86.org
Since this bugzilla report was filed, there have been several major
updates to the X Window System, which may resolve this issue. We
encourage you to upgrade to the latest version of Fedora Core
If this issue turns out to still be reproduceable in the latest
version of Fedora Core, please file a bug report in the X.Org
bugzilla located at http://bugs.freedesktop.org in the "dri"
Once you've filed your bug report to X.Org, if you paste the new
bug URL here, Red Hat will continue to track the issue in the
centralized X.Org bug tracker, and will review any bug fixes
that become available for consideration in future updates.