Program received signal SIGSEGV, Segmentation fault.
0x00007f5ab52f8b7f in sna_mode_wakeup (sna=0x7f5abb8a4000) at sna_display.c:6278
6278						assert(crtc->bo->active_scanout);
(gdb) bt full
#0  0x00007f5ab52f8b7f in sna_mode_wakeup (sna=0x7f5abb8a4000) at sna_display.c:6278
        vbl = 0x7fff83367e00
        crtc = 0xaff410
        e = 0x7fff83367e00
        buffer = "\002\000\000\000 \000\000\000\020\364\257\000\000\000\000\000\rE\000\000\226\374\a\000bo\001\000\000\000\000\000$\000\000\000\000\000\000\000$\000\000\000\000\000\000\000\240\254\255\000\000\000\000\000\226X\266\271Z\177\000\000\240\254\255\000\000\000\000\000$\000\000\000\000\000\000\000 \177\066\203\377\177\000\000\001\000\000\000\000\000\000\000$\000\000\000\000\000\000\000붵\271Z\177\000\000\001\000\000\000\000\000\000\000$\000\000\000\000\000\000\000 \177\066\203\377\177\000\000\001\000\000\000\000\000\000\000dID\265Z\177\000\000;\277Y\000\000\000\000\000 flush?=$\000\000\000\000\000\000\000$\000\000\000\000\000\000\000{ID\265Z\177\000\000\031\000\000\000\000\000\000\000\000\261"...
        len = 32
        i = 0
        __FUNCTION__ = "sna_mode_wakeup"
        __PRETTY_FUNCTION__ = "sna_mode_wakeup"
#1  0x00007f5ab52fc24a in sna_wakeup_handler (arg=0xb04080, result=29, read_mask=0x82ca80) at sna_driver.c:737
        sna = 0x7f5abb8a4000
        __FUNCTION__ = "sna_wakeup_handler"
#2  0x000000000043b89a in WakeupHandler ()
No symbol table info available.
#3  0x000000000058c5b7 in WaitForSomething ()
No symbol table info available.
#4  0x0000000000436951 in ?? ()
No symbol table info available.
#5  0x000000000043ad16 in ?? ()
No symbol table info available.
#6  0x00007f5ab9b10000 in __libc_start_main () from /usr/lib/libc.so.6
No symbol table info available.
#7  0x00000000004250fe in _start ()
No symbol table info available.