One of my clients is running RHEL 5.5 Client (aka workstation), paid-up with support. He has a multi-monitor setup using xinerama. The video card is a nVidia Quadro NVS 250. This problem occurs both with the latest-avilable video driver from the computer vendor (who happens to be Dell), and with the latest-available video driver from NVidia (2 August 2010, downloaded today).
When he runs a specific CAD tool, he sometimes observes apparent video problems, specifically:
- sometimes windows don't repaint themselves when brought to the front, they end up with the previously overlaying display still on the window. The user has to manually refresh the window. The specific circumstances which lead to a repaint failure are reproducible, however in general this does not happen (ie it only appears to fail under specific sequences of events).
- With a specific window, if he moves it from his primary display to his secondary display, the window loses the fonts on the menubar (File, Edit, Help, etc) and the menus themselves. The menus are still present, if you click on the window where they are supposed to be, the blank button highlights and the menu of blank options drops down where you can select them. If you move the window back to the primary display, you can get the fonts back if you resize the window slightly.
Before I get the Cad-tool vendor and Redhat blaming each other for this problem, does anyone have any ideas what is going on and how I might fix it?
