#0  0x00007f52076862a8 in raise () from /usr/lib/libc.so.6
No symbol table info available.
#1  0x00007f520768772a in abort () from /usr/lib/libc.so.6
No symbol table info available.
#2  0x00007f52076c2369 in __libc_message () from /usr/lib/libc.so.6
No symbol table info available.
#3  0x00007f52076c7d96 in malloc_printerr () from /usr/lib/libc.so.6
No symbol table info available.
#4  0x00007f52076c857e in _int_free () from /usr/lib/libc.so.6
No symbol table info available.
#5  0x00007f520244a015 in flip (sna=0x7f5209891000, crtc=0x559d5b0299b0, event_id=10267, target_msc=3454172, bo=0x559d5bb30690) at sna_present.c:627
        info = 0x559d5bf6be60
#6  0x00007f520244a422 in sna_present_flip (crtc=0x559d5b0299b0, event_id=10267, target_msc=3454172, pixmap=0x559d5bdf6210, sync_flip=1) at sna_present.c:760
        sna = 0x7f5209891000
        bo = 0x559d5bb30690
#7  0x0000559d5878165a in present_flip (crtc=0x559d5b0299b0, event_id=10267, target_msc=3454172, pixmap=0x559d5bdf6210, sync_flip=1) at present.c:204
        screen = 0x559d5afe3120
        screen_priv = 0x559d5ab634c0
#8  0x0000559d587827d3 in present_execute (vblank=0x559d5bf6bd40, ust=57750182857, crtc_msc=3454171) at present.c:681
        window = 0x559d5b25cd70
        screen = 0x559d5afe3120
        screen_priv = 0x559d5ab634c0
        mode = 0 '\000'
#9  0x0000559d58783198 in present_pixmap (window=0x559d5b25cd70, pixmap=0x559d5bdf6210, serial=520, valid=0x0, update=0x0, x_off=0, y_off=0, target_crtc=0x559d5b0299b0, wait_fence=0x0, 
    idle_fence=0x559d5be35870, options=0, window_msc=3454172, divisor=0, remainder=0, notifies=0x0, num_notifies=0) at present.c:956
        ust = 57750182857
        target_msc = 3454171
        crtc_msc = 3454171
        ret = 0
        vblank = 0x559d5bf6bd40
        tmp = 0x559d5bb87590
        screen = 0x559d5afe3120
        window_priv = 0x559d5bb87570
        screen_priv = 0x559d5ab634c0
#10 0x0000559d58785421 in proc_present_pixmap (client=0x559d5be823e0) at present_request.c:138
        stuff = 0x559d5be53ab0
        window = 0x559d5b25cd70
        pixmap = 0x559d5bdf6210
        valid = 0x0
        update = 0x0
        wait_fence = 0x0
        idle_fence = 0x559d5be35870
        target_crtc = 0x0
        ret = 0
        nnotifies = 0
        notifies = 0x0
#11 0x0000559d58785898 in proc_present_dispatch (client=0x559d5be823e0) at present_request.c:251
        stuff = 0x559d5be53ab0
#12 0x0000559d5862d59b in Dispatch () at dispatch.c:430
        clientReady = 0x559d5bc0e0c0
        result = 0
        client = 0x559d5be823e0
        nready = 0
        icheck = 0x559d58aec460 <checkForInput>
        start_tick = 305
#13 0x0000559d5863cf9d in dix_main (argc=5, argv=0x7ffec215b5d8, envp=0x7ffec215b608) at main.c:300
        i = 1
        alwaysCheckForInput = {0, 1}
#14 0x0000559d5861cd39 in main (argc=5, argv=0x7ffec215b5d8, envp=0x7ffec215b608) at stubmain.c:34
No locals.
quit
Detaching from program: /usr/lib/xorg-server/Xorg, process 27847