Already logging to gdb.txt.
Attaching to process 4696
[New LWP 4697]
[New LWP 4698]
[New LWP 4699]
[New LWP 4700]
[New LWP 4701]
[New LWP 4702]
[New LWP 4703]
[New LWP 4704]
[New LWP 4705]
[New LWP 4706]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007f46e4c5a5d3 in select () at ../sysdeps/unix/syscall-template.S:84
84	../sysdeps/unix/syscall-template.S: No such file or directory.
Breakpoint 1 at 0x7f46e08c14f9: file drmmode_display.c, line 484.
Continuing.

Thread 1 "Xorg" hit Breakpoint 1, drmmode_crtc_scanout_free (
    drmmode_crtc=0x564c5e9ca6d0) at drmmode_display.c:484
484		drmmode_crtc_scanout_destroy(drmmode_crtc->drmmode,
$1 = {drmmode = 0x564c5e862340, mode_crtc = 0x564c5e9ca7c0, hw_id = 0, 
  cursor_buffer = 0x564c5e9f2dd0, rotate = {bo = 0x564c5f5d65b0, 
    pixmap = 0x564c5f62e650, width = 1600, height = 1200}, scanout = {{
      bo = 0x564c5f0f01b0, pixmap = 0x564c5f5fa200, width = 1920, height = 1080}, {
      bo = 0x564c5f0b4520, pixmap = 0x564c5f622a10, width = 1920, height = 1080}}, 
  scanout_damage = 0x564c5f0507c0, ignore_damage = 0, scanout_last_region = {
    extents = {x1 = 0, y1 = 0, x2 = 1920, y2 = 1080}, data = 0x0}, scanout_id = 1, 
  scanout_update_pending = 0, tear_free = 1, prime_scanout_pixmap = 0x0, 
  dpms_mode = 0, dpms_last_ust = 0, dpms_last_seq = 0, dpms_last_fps = 0, 
  interpolated_vblanks = 0, need_modeset = 0, flip_pending = 0x0, 
  fb = 0x564c5f62f240, present_vblank_event_id = 0, present_vblank_usec = 0, 
  present_vblank_msc = 0, present_flip_expected = 0}
Continuing.

Thread 1 "Xorg" received signal SIGSEGV, Segmentation fault.
0x00007f46e08bb7e0 in amdgpu_scanout_flip (pScreen=0x564c5e9f2540, 
    info=0x564c5e862150, xf86_crtc=0x564c5e9cb290) at amdgpu_kms.c:990
990		if (!amdgpu_scanout_do_update(xf86_crtc, scanout_id,
Continuing.

Thread 1 "Xorg" hit Breakpoint 1, drmmode_crtc_scanout_free (
    drmmode_crtc=0x564c5e9ca6d0) at drmmode_display.c:484
484		drmmode_crtc_scanout_destroy(drmmode_crtc->drmmode,
Not confirmed.
Continuing.
[Thread 0x7f46d3ad5700 (LWP 4706) exited]
[Thread 0x7f46d4c3c700 (LWP 4705) exited]
[Thread 0x7f46d543d700 (LWP 4704) exited]
[Thread 0x7f46d5c3e700 (LWP 4703) exited]
[Thread 0x7f46d643f700 (LWP 4702) exited]
[Thread 0x7f46d6c40700 (LWP 4701) exited]
[Thread 0x7f46d7441700 (LWP 4700) exited]
[Thread 0x7f46de9f4700 (LWP 4699) exited]
[Thread 0x7f46df9f6700 (LWP 4697) exited]
[Thread 0x7f46e6df4a00 (LWP 4696) exited]
[Inferior 1 (process 4696) exited with code 01]