Version:            (using KDE 4.2.4)
OS:                Linux
Installed from:    Mandriva RPMs

In Mandriva 2009.1 I have been experiencing spontaneous restarts of X several times a day.  It seemed to happen mainly, if not always, when reading mail - though I spend so much time on MLs that that wasn't conclusive.  This afternoon I started kmail, korganizer and akregator as separate applications.  They have been open for several hours now, and I have used each regularly throughout the time.  I have had no X problems.

The crash report creator does not appear - it looks exactly as though I had used ctrl-alt-backspace.

From Xorg.0.log.old:

Backtrace:
0: /etc/X11/X(xorg_backtrace+0x37) [0x8136207]
1: /etc/X11/X(xf86SigHandler+0x56) [0x80d1fd6]
2: [0xffffe400]
3: /etc/X11/X(FindGlyphRef+0x13) [0x8172863]
4: /etc/X11/X(FindGlyphByHash+0x3b) [0x8172f8b]
5: /etc/X11/X [0x817fc92]
6: /etc/X11/X [0x8178c03]
7: /etc/X11/X(Dispatch+0x34f) [0x808971f]
8: /etc/X11/X(main+0x39d) [0x806d2fd]
9: /lib/i686/libc.so.6(__libc_start_main+0xe5) [0xb7ad06a5]
10: /etc/X11/X [0x806c7d1]

Fatal server error:
Caught signal 11.  Server aborting


Please consult the The X.Org Foundation support 
	 at http://qa.mandriva.com
 for help. 
Please also check the log file at "/var/log/Xorg.0.log" for additional information.

(II) UnloadModule: "synaptics"
(II) HID 1241:1111: Close
(II) UnloadModule: "evdev"
(II) AT Translated Set 2 keyboard: Close
(II) UnloadModule: "evdev"
(II) Sleep Button (CM): Close
(II) UnloadModule: "evdev"
(II) Video Bus: Close
(II) UnloadModule: "evdev"
(II) Power Button (CM): Close
(II) UnloadModule: "evdev"
(II) Power Button (FF): Close
(II) UnloadModule: "evdev"
(II) UnloadModule: "synaptics"
(II) AIGLX: Suspending AIGLX clients for VT switch
disable LVDS
(II) RADEON(0): RADEONRestoreMemMapRegisters() : 
(II) RADEON(0):   MC_FB_LOCATION   : 0x1fff0000 0xd3ffd000
(II) RADEON(0):   MC_AGP_LOCATION  : 0x27ff2000
finished PLL2
finished PLL1
Entering Restore TV
Restore TV PLL
Restore TVHV
Restore TV Restarts
Restore Timing Tables
Restore TV standard
Leaving Restore TV