Comment 4 for bug 780358

I have a similar problem. My xorg.log.0.old:
[ 13421.297] (II) XKB: reuse xkmfile /var/lib/xkb/server-DE6C341341A7E4B900B11D5846DBA55D2C6C0C2B.xkm
[ 13457.094] (II) XKB: reuse xkmfile /var/lib/xkb/server-DE6C341341A7E4B900B11D5846DBA55D2C6C0C2B.xkm
[ 18611.624] (II) XKB: reuse xkmfile /var/lib/xkb/server-DE6C341341A7E4B900B11D5846DBA55D2C6C0C2B.xkm
[ 18612.155]
Backtrace:
[ 18612.155] 0: /usr/bin/X (xorg_backtrace+0x3b) [0x80eab1b]
[ 18612.155] 1: /usr/bin/X (0x8048000+0x5fac8) [0x80a7ac8]
[ 18612.155] 2: (vdso) (__kernel_rt_sigreturn+0x0) [0x99a40c]
[ 18612.155] 3: /usr/bin/X (_CallCallbacks+0x3e) [0x8074e1e]
[ 18612.155] 4: /usr/bin/X (WriteToClient+0x267) [0x80a7607]
[ 18612.155] 5: /usr/lib/xorg/modules/extensions/libdri2.so (ProcDRI2WaitMSCReply+0x62) [0x1e8bf2]
[ 18612.155] 6: /usr/lib/xorg/modules/extensions/libdri2.so (DRI2WaitMSCComplete+0x75) [0x1e6fc5]
[ 18612.155] 7: /usr/lib/xorg/modules/drivers/radeon_drv.so (0x672000+0xce17c) [0x74017c]
[ 18612.155] 8: /usr/lib/xorg/modules/drivers/radeon_drv.so (0x672000+0xd1f12) [0x743f12]
[ 18612.155] 9: /lib/i386-linux-gnu/libdrm.so.2 (drmHandleEvent+0xf5) [0xfc4665]
[ 18612.155] 10: /usr/lib/xorg/modules/drivers/radeon_drv.so (0x672000+0xd1e2f) [0x743e2f]
[ 18612.156] 11: /usr/bin/X (WakeupHandler+0x52) [0x8074602]
[ 18612.156] 12: /usr/bin/X (WaitForSomething+0x1ba) [0x80a1f3a]
[ 18612.156] 13: /usr/bin/X (0x8048000+0x27f1e) [0x806ff1e]
[ 18612.156] 14: /usr/bin/X (0x8048000+0x1a81c) [0x806281c]
[ 18612.156] 15: /lib/i386-linux-gnu/libc.so.6 (__libc_start_main+0xe7) [0x4dfe37]
[ 18612.156] 16: /usr/bin/X (0x8048000+0x1a411) [0x8062411]
[ 18612.156] Segmentation fault at address 0xb6f59008
[ 18612.156]
Caught signal 11 (Segmentation fault). Server aborting
[ 18612.156]
Please consult the The X.Org Foundation support
  at http://wiki.x.org
 for help.
[ 18612.156] Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[ 18612.156]
[ 18612.176] (II) Power Button: Close
[ 18612.176] (II) UnloadModule: "evdev"
[ 18612.176] (II) Unloading evdev
[ 18612.176] (II) Video Bus: Close
[ 18612.176] (II) UnloadModule: "evdev"
[ 18612.176] (II) Unloading evdev
[ 18612.180] (II) Power Button: Close
[ 18612.180] (II) UnloadModule: "evdev"
[ 18612.180] (II) Unloading evdev
[ 18612.184] (II) CNF7051: Close
[ 18612.184] (II) UnloadModule: "evdev"
[ 18612.184] (II) Unloading evdev
[ 18612.184] (II) AT Translated Set 2 keyboard: Close
[ 18612.184] (II) UnloadModule: "evdev"
[ 18612.184] (II) Unloading evdev
[ 18612.202] (II) UnloadModule: "synaptics"
[ 18612.202] (II) Unloading synaptics
[ 18612.202] (II) AIGLX: Suspending AIGLX clients for VT switch
[ 18612.216] ddxSigGiveUp: Closing log

Feel free to reply if there is any more information I can give. I don't know how to use apport and when I try typing apport into a terminal I get apport: command not found.

Thanks