GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1 Copyright (C) 2014 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: . Find the GDB manual and other documentation resources online at: . For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from /usr/bin/Xorg...Reading symbols from /usr/lib/debug//usr/bin/Xorg...done. done. [New LWP 1478] [New LWP 1496] [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". Core was generated by `/usr/bin/X :0 -audit 0 -auth /var/lib/mdm/:0.Xauth -nolisten tcp vt8'. Program terminated with signal SIGSEGV, Segmentation fault. #0 0x00007f53a70c90ac in kgem_end_batch (kgem=0x7f53ad6e6000) at ../../../src/sna/kgem.c:2440 Thread 2 (Thread 0x7f53a6e7b700 (LWP 1496)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007f53a714b291 in __run__ (arg=0x55f0a8a1f6d0) at ../../../src/sna/sna_threads.c:70 #2 0x00007f53ac8c1182 in start_thread (arg=0x7f53a6e7b700) at pthread_create.c:312 #3 0x00007f53ab3d047d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111 Thread 1 (Thread 0x7f53ad77f9c0 (LWP 1478)): #0 0x00007f53a70c90ac in kgem_end_batch (kgem=0x7f53ad6e6000) at ../../../src/sna/kgem.c:2440 #1 _kgem_submit (kgem=0x7f53ad6e6000) at ../../../src/sna/kgem.c:4046 #2 0x000055f0a6ca3054 in _CallCallbacks (pcbl=pcbl@entry=0x55f0a7091c28 , call_data=call_data@entry=0x0) at ../../dix/dixutils.c:719 #3 0x000055f0a6df4dd6 in CallCallbacks (call_data=0x0, pcbl=0x55f0a7091c28 ) at ../../include/callback.h:83 #4 WriteToClient (who=who@entry=0x55f0a8dc0c60, count=count@entry=32, __buf=__buf@entry=0x7ffd80cc7fd0) at ../../os/io.c:849 #5 0x000055f0a6ca8df2 in WriteEventsToClient (pClient=pClient@entry=0x55f0a8dc0c60, count=count@entry=1, events=events@entry=0x7ffd80cc7fd0) at ../../dix/events.c:6029 #6 0x000055f0a6dc45f2 in DRI2SwapEvent (client=client@entry=0x55f0a8dc0c60, data=data@entry=0x55f0a8df1460, type=type@entry=2, ust=ust@entry=10173914884, msc=msc@entry=607847, sbc=) at ../../../../hw/xfree86/dri2/dri2ext.c:383 #7 0x000055f0a6dc3493 in DRI2SwapComplete (client=0x55f0a8dc0c60, pDraw=0x55f0a8df1460, frame=607847, tv_sec=, tv_usec=, type=type@entry=2, swap_complete=swap_complete@entry=0x55f0a6dc45a0 , swap_data=swap_data@entry=0x55f0a8df1460) at ../../../../hw/xfree86/dri2/dri2.c:1048 #8 0x00007f53a719def1 in frame_swap_complete (frame=frame@entry=0x55f0aa193020, type=type@entry=2) at ../../../src/sna/sna_dri2.c:1586 #9 0x00007f53a71a1a95 in sna_dri2_vblank_handler (event=) at ../../../src/sna/sna_dri2.c:2598 #10 0x00007f53a710fe45 in sna_mode_wakeup (sna=sna@entry=0x7f53ad6e6000) at ../../../src/sna/sna_display.c:8700 #11 0x00007f53a7111668 in sna_mode_reset (sna=sna@entry=0x7f53ad6e6000) at ../../../src/sna/sna_display.c:7700 #12 0x00007f53a7113c58 in sna_leave_vt (arg=0x55f0a8a1f000) at ../../../src/sna/sna_driver.c:908 #13 0x00007f53a94da48d in glxDRILeaveVT (scrn=0x55f0a8a1f000) at ../../glx/glxdri2.c:831 #14 0x000055f0a6cddd55 in AbortDDX (error=error@entry=EXIT_ERR_ABORT) at ../../../../hw/xfree86/common/xf86Init.c:1146 #15 0x000055f0a6dfce22 in AbortServer () at ../../os/log.c:770 #16 0x000055f0a6dfdb28 in FatalError (f=f@entry=0x55f0a6e28548 "Caught signal %d (%s). Server aborting\n") at ../../os/log.c:911 #17 0x000055f0a6df558c in OsSigHandler (signo=11, sip=, unused=) at ../../os/osinit.c:147 #18 #19 kgem_bo_wait (kgem=kgem@entry=0x7f53ad6e6000, bo=0x0) at ../../../src/sna/kgem.c:1719 #20 0x00007f53a70c7901 in kgem_new_batch (kgem=kgem@entry=0x7f53ad6e6000) at ../../../src/sna/kgem.c:1783 #21 0x00007f53a70c9a50 in kgem_create_batch (kgem=0x7f53ad6e6000) at ../../../src/sna/kgem.c:3941 #22 _kgem_submit (kgem=kgem@entry=0x7f53ad6e6000) at ../../../src/sna/kgem.c:4069 #23 0x00007f53a70ff1e7 in sna_blt_copy_boxes (sna=sna@entry=0x7f53ad6e6000, alu=alu@entry=3 '\003', src_bo=src_bo@entry=0x55f0aa2c1fe0, src_dx=src_dx@entry=0, src_dy=, dst_bo=dst_bo@entry=0x55f0aa0b7d20, dst_dx=dst_dx@entry=-4480, dst_dy=dst_dy@entry=-4, bpp=32, box=, box@entry=0x7ffd80cc9210, nbox=0, nbox@entry=1) at ../../../src/sna/sna_blt.c:4012 #24 0x00007f53a718f378 in gen7_render_copy_boxes (sna=0x7f53ad6e6000, alu=, src=0x55f0a8ea05a0, src_bo=0x55f0aa2c1fe0, src_dx=, src_dy=, dst=0x55f0a8ea05a0, dst_bo=0x55f0aa0b7d20, dst_dx=-4480, dst_dy=-4, box=0x7ffd80cc9210, n=1, flags=1) at ../../../src/sna/gen7_render.c:2944 #25 0x00007f53a70cf584 in sna_get_image__blt (flags=, dst=, region=, pixmap=) at ../../../src/sna/sna_accel.c:17085 #26 sna_get_image__fast (pixmap=pixmap@entry=0x55f0a8ea05a0, region=region@entry=0x7ffd80cc9210, dst=dst@entry=0x7f53a40a7000 "K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377"..., flags=flags@entry=2) at ../../../src/sna/sna_accel.c:17152 #27 0x00007f53a70e503e in sna_get_image (drawable=0x55f0a8b76940, x=, y=, w=1080, h=1, format=, mask=4294967295, dst=0x7f53a40a7000 "K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377"...) at ../../../src/sna/sna_accel.c:17199 #28 0x000055f0a6de26d3 in miSpriteGetImage (pDrawable=0x55f0a8b76940, sx=4480, sy=4, w=1080, h=1, format=2, planemask=4294967295, pdstLine=0x7f53a40a7000 "K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377"...) at ../../mi/misprite.c:405 #29 0x000055f0a6d28cd5 in compGetImage (pDrawable=0x55f0a8b76940, sx=, sy=, w=, h=, format=, planemask=4294967295, pdstLine=0x7f53a40a7000 "K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377K9M\377"...) at ../../composite/compinit.c:148 #30 0x000055f0a6d378fc in ProcShmGetImage (client=client@entry=0x55f0a94120f0) at ../../Xext/shm.c:690 #31 0x000055f0a6d38938 in ProcShmDispatch (client=0x55f0a94120f0) at ../../Xext/shm.c:1303 #32 0x000055f0a6c9df0e in Dispatch () at ../../dix/dispatch.c:433 #33 0x000055f0a6ca1d9a in dix_main (argc=9, argv=0x7ffd80cc95f8, envp=) at ../../dix/main.c:294 #34 0x00007f53ab2f7ec5 in __libc_start_main (main=0x55f0a6c8d1c0
, argc=9, argv=0x7ffd80cc95f8, init=, fini=, rtld_fini=, stack_end=0x7ffd80cc95e8) at libc-start.c:287 #35 0x000055f0a6c8d1ee in _start () (gdb) quit