Created attachment 33930 [details]
A program that demonstrates the bug
In GNU Octave we use OpenGL to plot data. From time to time I see lines that simply disappear in short places. I have been able to reproduce the problem with a simple test case, which I attach. On my machine, this program generates an image which I also attach.
I have an Intel GM45 graphics card and I am using Ubuntu 9.10.
Created attachment 33931 [details]
Image that shows the result of running the demonstration program
Please attach the glxinfo output.
Created attachment 33962 [details]
Output of 'glxinfo'
I ended up making an automated test for this bug while tracking down another issue, and it looks like QA opened bug report #28832 for it. I'm going to track this problem there, since we have clear success criteria that way.
*** This bug has been marked as a duplicate of bug 28832 ***
The patches that fix this bug is up-streamed