Created attachment 142736 [details]
dmesg dump

Random hangs. No mouse pointer, no keyboard. The host is responsive to SSH
albeit slow. After some time reboots. No traces in journald, /var/log/syslog
mostly repeats dmesg dump.

System info:

$ lspci:
    07:00.0 VGA compatible controller: NVIDIA Corporation GT215 [GeForce GT
240] (rev a2)

$ uname:
Linux  4.18.0-3-amd64 #1 SMP Debian 4.18.20-2 (2018-11-23) x86_64 GNU/Linux

$ dpkg:
xwayland                        2:1.20.3-1
libva-wayland2:amd64            2.3.0-2
libwayland-server0:amd64        1.16.0-1
xserver-xorg-video-nouveau      1:1.0.15-3
libdrm-nouveau2:amd64           2.4.95-1

$ lsmod:
  nouveau              2162688  12
  mxm_wmi                16384  1 nouveau
  wmi                    28672  2 mxm_wmi,nouveau
  video                  45056  1 nouveau
  ttm                   131072  1 nouveau
  drm_kms_helper        196608  1 nouveau
  drm                   475136  13 drm_kms_helper,ttm,nouveau
  i2c_algo_bit           16384  1 nouveau
  button                 16384  1 nouveau