Using host libthread_db library "/lib/libthread_db.so.1".
Attaching to program: /usr/bin/Xorg, process 7775
`system-supplied DSO at 0xffffe000' has disappeared; keeping its symbols.
Reading symbols from /lib/libdl.so.2...done.
Loaded symbols for /lib/libdl.so.2
Reading symbols from /usr/lib/libXfont.so.1...done.
Loaded symbols for /usr/lib/libXfont.so.1
Reading symbols from /usr/lib/libfreetype.so.6...done.
Loaded symbols for /usr/lib/libfreetype.so.6
Reading symbols from /usr/lib/libXau.so.6...done.
Loaded symbols for /usr/lib/libXau.so.6
Reading symbols from /usr/lib/libfontenc.so.1...done.
Loaded symbols for /usr/lib/libfontenc.so.1
Reading symbols from /usr/lib/libz.so.1...done.
Loaded symbols for /usr/lib/libz.so.1
Reading symbols from /usr/lib/libXdmcp.so.6...done.
Loaded symbols for /usr/lib/libXdmcp.so.6
Reading symbols from /lib/libm.so.6...done.
Loaded symbols for /lib/libm.so.6
Reading symbols from /usr/lib/libgcc_s.so.1...done.
Loaded symbols for /usr/lib/libgcc_s.so.1
Reading symbols from /lib/libc.so.6...done.
Loaded symbols for /lib/libc.so.6
Reading symbols from /lib/ld-linux.so.2...done.
Loaded symbols for /lib/ld-linux.so.2
Reading symbols from /usr/lib/xorg/modules/libpcidata.so...done.
Loaded symbols for /usr/lib/xorg/modules//libpcidata.so
Reading symbols from /usr/lib/xorg/modules/extensions/libextmod.so...done.
Loaded symbols for /usr/lib/xorg/modules/extensions//libextmod.so
Reading symbols from /usr/lib/xorg/modules/extensions/libdbe.so...done.
Loaded symbols for /usr/lib/xorg/modules/extensions//libdbe.so
Reading symbols from /usr/lib/xorg/modules/extensions/librecord.so...done.
Loaded symbols for /usr/lib/xorg/modules/extensions//librecord.so
Reading symbols from /usr/lib/xorg/modules/extensions/libglx.so...done.
Loaded symbols for /usr/lib/xorg/modules/extensions//libglx.so
Reading symbols from /usr/lib/xorg/modules/extensions/libdri.so...done.
Loaded symbols for /usr/lib/xorg/modules/extensions//libdri.so
Reading symbols from /usr/lib/xorg/modules/linux/libdrm.so...done.
Loaded symbols for /usr/lib/xorg/modules/linux//libdrm.so
Reading symbols from /usr/lib/xorg/modules/input/synaptics_drv.so...done.
Loaded symbols for /usr/lib/xorg/modules/input//synaptics_drv.so
Reading symbols from /usr/lib/xorg/modules/fonts/libfreetype.so...done.
Loaded symbols for /usr/lib/xorg/modules/fonts//libfreetype.so
Reading symbols from /usr/lib/xorg/modules/fonts/libtype1.so...done.
Loaded symbols for /usr/lib/xorg/modules/fonts//libtype1.so
Reading symbols from /usr/lib/xorg/modules/drivers/ati_drv.so...done.
Loaded symbols for /usr/lib/xorg/modules/drivers//ati_drv.so
Reading symbols from /usr/lib/xorg/modules/input/mouse_drv.so...done.
Loaded symbols for /usr/lib/xorg/modules/input//mouse_drv.so
Reading symbols from /usr/lib/xorg/modules/input/kbd_drv.so...done.
Loaded symbols for /usr/lib/xorg/modules/input//kbd_drv.so
Reading symbols from /usr/lib/xorg/modules/drivers/radeon_drv.so...done.
Loaded symbols for /usr/lib/xorg/modules/drivers//radeon_drv.so
Reading symbols from /usr/lib/xorg/modules/libvgahw.so...done.
Loaded symbols for /usr/lib/xorg/modules//libvgahw.so
Reading symbols from /usr/lib/xorg/modules/libint10.so...done.
Loaded symbols for /usr/lib/xorg/modules//libint10.so
Reading symbols from /usr/lib/xorg/modules/libshadowfb.so...done.
Loaded symbols for /usr/lib/xorg/modules//libshadowfb.so
Reading symbols from /usr/lib/xorg/modules/libddc.so...done.
Loaded symbols for /usr/lib/xorg/modules//libddc.so
Reading symbols from /usr/lib/xorg/modules/libi2c.so...done.
Loaded symbols for /usr/lib/xorg/modules//libi2c.so
Reading symbols from /usr/lib/xorg/modules/libfb.so...done.
Loaded symbols for /usr/lib/xorg/modules//libfb.so
Reading symbols from /usr/lib/xorg/modules/libramdac.so...done.
Loaded symbols for /usr/lib/xorg/modules//libramdac.so
Reading symbols from /usr/lib/xorg/modules/libxaa.so...done.
Loaded symbols for /usr/lib/xorg/modules//libxaa.so
Reading symbols from /usr/lib/xorg/modules/multimedia/theatre_detect_drv.so...done.
Loaded symbols for /usr/lib/xorg/modules/multimedia//theatre_detect_drv.so
Reading symbols from /usr/lib/modules/dri/radeon_dri.so...done.
Loaded symbols for /usr/lib/dri/radeon_dri.so
Reading symbols from /lib/libpthread.so.0...done.
Loaded symbols for /lib/libpthread.so.0
Reading symbols from /usr/lib/libexpat.so.1...done.
Loaded symbols for /usr/lib/libexpat.so.1
Reading symbols from /usr/lib/libdrm.so.2...done.
Loaded symbols for /usr/lib/libdrm.so.2
0xffffe40e in __kernel_vsyscall ()
(gdb) Undefined command: "module".  Try "help".
(gdb) #0  0xffffe40e in __kernel_vsyscall ()
#1  0xb7d55e79 in ioctl () from /lib/libc.so.6
#2  0xb7ef7dd5 in drmGetLock (fd=9, context=3, flags=3215417572)
    at xf86drm.c:1221
#3  0xb2e24db5 in radeonGetLock (rmesa=0x8d4b4e8, flags=3215417572)
    at radeon_lock.c:78
#4  0xb2e23172 in radeonFlushCmdBuf (rmesa=0x8d4b4e8, 
    caller=0x36 <Address 0x36 out of bounds>) at radeon_ioctl.c:617
#5  0xb2e21b8c in radeonDestroyContext (driContextPriv=0x36)
    at radeon_context.c:515
#6  0xb2e1d83e in driDestroyContext (dpy=0x36, scrn=54, 
    contextPrivate=0x85f7628) at ../common/dri_util.c:719
#7  0xb7c33634 in __glXDRIcontextDestroy (baseContext=0x8ad6d28)
    at glxdri.c:219
#8  0xb7c104a5 in __glXFreeContext (cx=0x8ad6d28) at glxext.c:236
#9  0xb7c10538 in ClientGone (clientIndex=6, id=1086324866) at glxext.c:144
#10 0x0806ffe3 in FreeClientResources (client=0x865fb98) at resource.c:780
#11 0x080868b7 in CloseDownClient (client=0x865fb98) at dispatch.c:3561
#12 0x081a545f in EstablishNewConnections (clientUnused=0x0, closure=0x81e49e0)
    at connection.c:792
#13 0x0808b786 in ProcessWorkQueue () at dixutils.c:577
#14 0x081a1838 in WaitForSomething (pClientsReady=0xbfa76730) at WaitFor.c:171
#15 0x0808739d in Dispatch () at dispatch.c:383
#16 0x0806e015 in main (argc=4, argv=0xbfa76c54, envp=0x36) at main.c:444
(gdb) Detaching from program: /usr/bin/Xorg, process 7775
(gdb)