Hi, i don't know why you were doing the kernel/vga driver update, but if there wasn't a particular bug you were fixing, i would downgrade the kernel/driver/X server back to previous, working versions.. -- *Karel Lang* *Unix/Linux Administration* [log in to unmask] | +420 731 13 40 40 AUFEER DESIGN, s.r.o. | www.aufeerdesign.cz On 03/31/2016 08:18 PM, Stephen Isard wrote: > I have a Dell Optiplex 980 with a Radeon HD 6450 card which was working > fine with the elrepo fglrx-x11-drv and kmod-fglrx packages until I > recently upgraded to kernel 2.6.32-573.12.1.el6.x86_64 and fglrx > versions 15.12-1. Now when I move a window on the screen, the content > isn't erased from the old location, leaving a trail of ghosts behind. > This happens with more than one window manager (fvwm, icewm, fluxbox), > so I think its an X problem, rather than a window manager bug. > > The guys at elrepo were very responsive, but they didn't have the > problem on their own machines, and it's not really their software - it > is closed source from ATI - and they have run out of guesses for what to > try. I have tried installing ATI's own rpm and that behaves the same > way. I've filed a bug on the unofficial ATI bugzilla, but don't have > great hopes there. I'm wondering whether anyone here has ever seen > symptoms like these. Using the radeon driver gets me a mostly usable > system, but there is some stuff that says it won't work without glx. > > Stephen Isard >