Originally Posted by Lithorus
You should talk to the rdesktop developers instead. Glx is not anything nvidia specific.
I have not tested extensively,
but this appears to be associated with the latest version of nVidia's binary driver
and perhaps then only with Xinerama. For example,
I used with FC4 rdesktop for over a year with NVidia's 1.0.8178 driver,
and throwing the same FC5 rdesktop (1.4.1-3.2.1) to another
non-nVidia, non-glx Xinerama X server does not manifest this problem.
The main reason we thought to try glx was that google hits for that error message
seem most often associated with GL apps.