Problem with the X server

[benito perez lopez]

I have a problem with the X server installed on my machine. KDE fails after some 
time....
This is the log content:

Backtrace:
[  2670.969] 0: X (xorg_backtrace+0x28) [0x48daf8]
[  2670.969] 1: X (0x400000+0x6ae89) [0x46ae89]
[  2670.969] 2: /lib64/libc.so.6 (0x7f8e57451000+0x32a60) [0x7f8e57483a60]
[  2670.969] 3: /lib64/libc.so.6 (memcpy+0xd2) [0x7f8e574d08e2]
[  2670.969] 4: /usr/lib64/xorg/modules/drivers/radeon_drv.so 
(0x7f8e55327000+0xc194b) [0x7f8e553e894b]
[  2670.969] 5: /usr/lib64/xorg/modules/libexa.so (0x7f8e546d7000+0x947f) 
[0x7f8e546e047f]
[  2670.969] 6: /usr/lib64/xorg/modules/libexa.so (0x7f8e546d7000+0x95ad) 
[0x7f8e546e05ad]
[  2670.969] 7: X (miCopyRegion+0x13d) [0x530d3d]
[  2670.969] 8: X (miDoCopy+0x461) [0x5313c1]
[  2670.969] 9: /usr/lib64/xorg/modules/libexa.so (0x7f8e546d7000+0x8577) 
[0x7f8e546df577]
[  2670.969] 10: X (0x400000+0xb357d) [0x4b357d]
[  2670.970] 11: X (0x400000+0x3ca21) [0x43ca21]
[  2670.970] 12: X (0x400000+0x40b6c) [0x440b6c]
[  2670.970] 13: X (0x400000+0x25f3a) [0x425f3a]
[  2670.970] 14: /lib64/libc.so.6 (__libc_start_main+0xfd) [0x7f8e5746fb7d]
[  2670.970] 15: X (0x400000+0x25af9) [0x425af9]
[  2670.970] Segmentation fault at address (nil)
[  2670.971] 
Fatal server error:
[  2670.971] Caught signal 11 (Segmentation fault). Server aborting
[  2670.971] 
[  2670.971] 
Please consult the The X.Org Foundation support 
     at http://wiki.x.org
 for help. 
[  2670.972] Please also check the log file at "/var/log/Xorg.0.log" for 
additional information.
[  2670.972] 
[  2671.011] (II) Power Button: Close
[  2671.011] (II) UnloadModule: "evdev"
[  2671.015] (II) Video Bus: Close
[  2671.015] (II) UnloadModule: "evdev"
[  2671.019] (II) AT Translated Set 2 keyboard: Close
[  2671.019] (II) UnloadModule: "evdev"
[  2671.027] (II) ImPS/2 Logitech Wheel Mouse: Close
[  2671.027] (II) UnloadModule: "evdev"
[  2671.045] (II) AIGLX: Suspending AIGLX clients for VT switch


Any idea??? Thanks.....