Hi, Brice.Goglin@ens-lyon.org (2009-04-20 at 2105.01 +0200): > Which desktop environment and window manager are you using? Can you try > a dumb window manager such as twm instead? Plain Sawfish, and yes, it happens with twm too. It works when using software OpenGL (for example two X sessions, the second one fall backs to SW rasterizer). GSR