Bug#626789: #626789: xserver-xorg: xserver crashes randomly

[Andreas Theofilu <andreas@theosys.at>]

Here is a full backtrace as described in the howto:

#0  0x00007f5a378ca3d5 in raise (sig=<value optimized out>)
    at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
        pid = <value optimized out>
        selftid = <value optimized out>
#1  0x00007f5a378cd650 in abort () at abort.c:92
        act = {__sigaction_handler = {sa_handler = 0x1009340, 
            sa_sigaction = 0x1009340}, sa_mask = {__val = {140025486640693, 
              16398288, 140025421467750, 2, 16388784, 140025455569824, 
              140025488516280, 0, 4294967295, 0, 1, 8199384, 0, 1, 16248512, 
              0}}, sa_flags = 962832258, sa_restorer = 0x1}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x0000000000466e9e in OsAbort () at ../../os/utils.c:1241
No locals.
#3  0x0000000000472527 in ddxGiveUp ()
    at ../../../../hw/xfree86/common/xf86Init.c:915
        i = <value optimized out>
#4  0x000000000046373d in AbortServer () at ../../os/log.c:410
No locals.
#5  0x000000000046394e in FatalError (
    f=0x57e8b0 "Caught signal %d (%s). Server aborting\n")
    at ../../os/log.c:536
        args = {{gp_offset = 24, fp_offset = 48, 
            overflow_arg_area = 0x7fffedde7b60, 
            reg_save_area = 0x7fffedde7aa0}}
        beenhere = 1
#6  0x000000000046473e in OsSigHandler (signo=11, sip=<value optimized out>, 
    unused=<value optimized out>) at ../../os/osinit.c:153
No locals.
#7  <signal handler called>
No symbol table info available.
#8  dixGetPrivate (pScreen=0x0) at ../../include/privates.h:131
No locals.
#9  dixLookupPrivate (pScreen=0x0) at ../../include/privates.h:161
No locals.
#10 glxGetScreen (pScreen=0x0) at ../../glx/glxscreens.c:200
No locals.
#11 0x00007f5a36345f9c in __glXDRIdrawableDestroy (drawable=0x521bc10)
    at ../../glx/glxdri.c:233
        private = 0x521bc10
        screen = <value optimized out>
        i = <value optimized out>
#12 0x00007f5a3633d0c4 in DrawableGone (glxPriv=0x521bc10, 
    xid=<value optimized out>) at ../../glx/glxext.c:171
        c = <value optimized out>
        next = <value optimized out>
#13 0x000000000044e74e in FreeResource (id=27264015, skipDeleteFuncType=0)
    at ../../dix/resource.c:596
        rtype = <value optimized out>
        cid = <value optimized out>
        res = 0x7d40920
        prev = 0x1144e68
        head = 0x1144e68
        elements = 424
#14 0x00007f5a36338db9 in DoDestroyDrawable (glxdrawable=27264015, 
    type=<value optimized out>, cl=<value optimized out>)
    at ../../glx/glxcmds.c:1340
        pGlxDraw = 0x521bc10
        err = <value optimized out>
#15 0x00007f5a3633ce93 in __glXDispatch (client=0x20fa450)
    at ../../glx/glxext.c:583
        rendering = <value optimized out>
        stuff = 0x3babbe8
        opcode = <value optimized out>
        proc = 0x7f5a36339e70 <__glXDisp_DestroyPixmap>
        cl = 0x20fa578
        retval = <value optimized out>
#16 0x0000000000431731 in Dispatch () at ../../dix/dispatch.c:431
        clientReady = 0x4581e10
        result = <value optimized out>
        client = 0x20fa450
        nready = 0
        icheck = 0x7eca70
        start_tick = 13880
#17 0x00000000004257de in main (argc=9, argv=<value optimized out>, 
    envp=<value optimized out>) at ../../dix/main.c:287
        i = <value optimized out>
        alwaysCheckForInput = {0, 1}


Here is some additional information: The error seems to happen only 
if desktop effects (KDE) are enabled. If this option is not checked, the 
system remains stable, but shows sometimes some odd things like missing parts 
of the content of a window. Especially when logout, it turns the background to 
black and white and a small window appears asking to really logout. This small 
window is seen only partly but works, what means, that the partly or not 
visible buttons are accepting mouse clicks.

-- 
Andreas Theofilu