Random X crashes - radeon m 7500

[Dave Wood]

In the kast few days I've had quite a few X crashes. I tried to attach
process to gdb but I had some internal errors and locked up my laptop when
I tried to switch back to vt 7. This is a radeon M 7500

Is there some way of debugging this without gdbm or does anyone have any
ideas what the cause might be?

Googling produces some results but they seem to be various and I haven't
found any solution.

Here is the end of my xorg log:

Backtrace:
 0: /usr/bin/X(xf86SigHandler+0x7e) [0x80bf1ee]
 1: [0xffffe420]
 2: /usr/lib/xorg/modules//libxaa.so [0xb798aded]
 3: /usr/bin/X [0x8168704]
 4: /usr/bin/X(CompositeGlyphs+0x9a) [0x814fd8a]
 5: /usr/bin/X [0x8157648]
 6: /usr/bin/X [0x8152aa5]
 7: /usr/bin/X [0x814620e]
 8: /usr/bin/X(Dispatch+0x2bf) [0x808688f]
 9: /usr/bin/X(main+0x48b) [0x806ddab]
 10: /lib/libc.so.6(__libc_start_main+0xe0) [0xb7d5a390]
 11: /usr/bin/X(FontFileCompleteXLFD+0x20d) [0x806d121]
 
 Fatal server error:
 Caught signal 11.  Server aborting
 
 (II) AIGLX: Suspending AIGLX clients for VT switch
 disable montype: 2
 (II) RADEON(0): RADEONRestoreMemMapRegisters() :
 (II) RADEON(0):   MC_FB_LOCATION   : 0x1fff0000 0xe3ffe000
 (II) RADEON(0):   MC_AGP_LOCATION  : 0x27ff2000
 finished PLL2
 Entering Restore TV
 Restore TV PLL
 Restore TVHV
 Restore TV Restarts
 Restore Timing Tables
 Restore TV standard
 Leaving Restore TV

And the device section from xorg.conf:

Section "Device"
         ### Available Driver options are:-
         ### Values: <i>: integer, <f>: float, <bool>: "True"/"False",
         ### <string>: "String", <freq>: "<f> Hz/kHz/MHz"
         ### [arg]: arg optional
         Option "XAANoOffscreenPixmaps" "true"
         #Option     "NoAccel"               # [<bool>]
         #Option     "SWcursor"              # [<bool>]
         #Option     "Dac6Bit"               # [<bool>]
         #Option     "Dac8Bit"               # [<bool>]
         #Option     "BusType"               # [<str>]
         #Option     "CPPIOMode"             # [<bool>]
         #Option     "CPusecTimeout"         # <i>
         Option     "AGPMode" "4"            # <i>
         #Option     "AGPFastWrite"          # [<bool>]
         #Option     "AGPSize"               # <i>
         #Option     "GARTSize"              # <i>
         #Option     "RingSize"              # <i>
         #Option     "BufferSize"            # <i>
         #Option     "EnableDepthMoves"      # [<bool>]
         #Option     "EnablePageFlip"        # [<bool>]
         #Option     "NoBackBuffer"          # [<bool>]
         #Option     "DMAForXv"              # [<bool>]
         #Option     "FBTexPercent"          # <i>
         #Option     "DepthBits"             # <i>
         #Option     "PCIAPERSize"           # <i>
         #Option     "AccelDFS"              # [<bool>]
         #Option     "DDCMode"               # [<bool>]
         #Option     "IgnoreEDID"            # [<bool>]
         #Option     "DisplayPriority"       # [<str>]
         #Option     "PanelSize"             # [<str>]
         #Option     "ForceMinDotClock"      # <freq>
         #Option     "ColorTiling"           # [<bool>]
         #Option     "VideoKey"              # <i>
         #Option     "RageTheatreCrystal"    # <i>
         #Option     "RageTheatreTunerPort"  # <i>
         #Option     "RageTheatreCompositePort"  # <i>
         #Option     "RageTheatreSVideoPort"     # <i>
         #Option     "TunerType"             # <i>
         #Option     "RageTheatreMicrocPath"     # <str>
         #Option     "RageTheatreMicrocType"     # <str>
         #Option     "ScalerWidth"           # <i>
         Option     "RenderAccel" "True"         # [<bool>]
         #Option     "SubPixelOrder"         # [<str>]
         #Option     "ShowCache"             # [<bool>]
         #Option     "DynamicClocks"         # [<bool>]
         #Option     "VGAAccess"             # [<bool>]
         #Option     "ReverseDDC"            # [<bool>]
         #Option     "LVDSProbePLL"          # [<bool>]
         Option     "AccelMethod" "XGA"          # <str>
         Option     "DRI" "True"                 # [<bool>]
         #Option     "ConnectorTable"        # <str>
         #Option     "DefaultConnectorTable"     # [<bool>]
         #Option     "DefaultTMDSPLL"        # [<bool>]
         #Option     "TVDACLoadDetect"       # [<bool>]
         #Option     "ForceTVOut"            # [<bool>]
         #Option     "TVStandard"            # <str>
         #Option     "IgnoreLidStatus"       # [<bool>]
     Identifier  "Card0"
     Driver      "radeon"
     VendorName  "ATI Technologies Inc"
     BoardName   "Radeon Mobility M7 LW [Radeon Mobility 7500]"
     BusID       "PCI:1:0:0"

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