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Reading symbols from /usr/lib/xorg-server/Xorg...done.
[New LWP 2826]
[New LWP 2827]
[New LWP 2828]

warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
Core was generated by `/usr/lib/xorg-server/Xorg -nolisten tcp :0 vt1 -auth /tmp/serverauth.2oJYIDAG9p'.
Program terminated with signal SIGABRT, Aborted.
#0  0x00007fe31e903528 in raise () from /usr/lib/libc.so.6
(gdb) bt
#0  0x00007fe31e903528 in raise () from /usr/lib/libc.so.6
#1  0x00007fe31e90493a in abort () from /usr/lib/libc.so.6
#2  0x000000000059702e in OsAbort () at utils.c:1342
#3  0x000000000047975c in ddxGiveUp (error=error@entry=EXIT_ERR_ABORT) at xf86Init.c:1065
#4  0x0000000000479816 in AbortDDX (error=error@entry=EXIT_ERR_ABORT) at xf86Init.c:1109
#5  0x000000000059caa2 in AbortServer () at log.c:784
#6  0x000000000059d8ad in FatalError (f=f@entry=0x5c71b0 "Caught signal %d (%s). Server aborting\n") at log.c:925
#7  0x000000000059498c in OsSigHandler (signo=11, sip=<optimized out>, unused=<optimized out>) at osinit.c:147
#8  <signal handler called>
#9  0x00007fe31318a968 in fbBltOne (src=0x1d43c5c, srcStride=<optimized out>, srcStride@entry=1, srcX=srcX@entry=0, dst=0x0, dstStride=0, dstStride@entry=8, dstX=<optimized out>, dstBpp=32, 
    width=256, height=7, fgand=0, fgxor=16119285, bgand=0, bgxor=1710618) at fbbltone.c:334
#10 0x00007fe31318e83f in fbPutXYImage (pDrawable=pDrawable@entry=0x1ec50d0, pClip=<optimized out>, fg=<optimized out>, bg=<optimized out>, pm=4294967295, alu=3, opaque=1, x=0, y=0, 
    width=8, height=8, src=0x1d43c58, srcStride=1, srcX=0) at fbimage.c:202
#11 0x00007fe31318eb52 in fbPutImage (pDrawable=pDrawable@entry=0x1ec50d0, pGC=pGC@entry=0x1ecb9b0, depth=depth@entry=1, x=x@entry=0, y=y@entry=0, w=w@entry=8, h=8, leftPad=0, format=0, 
    pImage=0x1d43c58 "<") at fbimage.c:48
#12 0x00007fe3186c1d0d in glamor_put_image_bail (bits=0x1d43c58 "<", format=0, leftPad=0, h=8, w=8, y=0, x=0, depth=1, gc=0x1ecb9b0, drawable=0x1ec50d0) at glamor_image.c:92
#13 glamor_put_image (drawable=0x1ec50d0, gc=0x1ecb9b0, depth=1, x=0, y=0, w=8, h=8, leftPad=0, format=0, bits=0x1d43c58 "<") at glamor_image.c:102
#14 0x000000000051c473 in damagePutImage (pDrawable=0x1ec50d0, pGC=0x1ecb9b0, depth=1, x=0, y=0, w=<optimized out>, h=8, leftPad=0, format=0, pImage=0x1d43c58 "<") at damage.c:735
#15 0x00000000004355ed in ProcPutImage (client=0x1c3b660) at dispatch.c:2014
#16 0x0000000000438a17 in Dispatch () at dispatch.c:432
#17 0x000000000043cb8b in dix_main (argc=7, argv=0x7ffe68840368, envp=<optimized out>) at main.c:298
#18 0x00007fe31e8f0790 in __libc_start_main () from /usr/lib/libc.so.6
#19 0x0000000000427039 in _start ()
(gdb) q
           PID: 2826 (Xorg)
           UID: 1000 (martin)
           GID: 1000 (martin)
        Signal: 6 (ABRT)
     Timestamp: Die 2015-05-26 14:13:42 CEST (6h ago)
  Command Line: /usr/lib/xorg-server/Xorg -nolisten tcp :0 vt1 -auth /tmp/serverauth.2oJYIDAG9p
    Executable: /usr/lib/xorg-server/Xorg
 Control Group: /user.slice/user-1000.slice/session-c1.scope
          Unit: session-c1.scope
         Slice: user-1000.slice
       Session: c1
     Owner UID: 1000 (martin)
       Boot ID: d251aed3c4d34733b9b1c7957ad22be4
    Machine ID: 1c9ccdc303b14fc2bea9f598f3915e7e
      Hostname: martin-arch
      Coredump: /var/lib/systemd/coredump/core.Xorg.1000.d251aed3c4d34733b9b1c7957ad22be4.2826.1432642422000000.lz4
       Message: Process 2826 (Xorg) of user 1000 dumped core.