Created attachment 133956 [details]
/sys/class/drm/card0/error

Relevant dmesg:

[137425.081337] [drm] GPU HANG: ecode 9:0:0x8fd8ffff, in ffmpeg [20595], reason: Hang on render ring, action: reset
[137425.081338] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
[137425.081339] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
[137425.081339] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
[137425.081339] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
[137425.081340] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[137425.081372] drm/i915: Resetting chip after gpu hang
[137425.081404] [drm] RC6 on
[137425.096808] [drm] GuC firmware load skipped

Distro: Debian buster/sid, Environment: KDE 5.28.0, desktop effects on

What I was doing: using VA-API to decode H264 video for transcoding, while browsing with Google Chrome 60.0.3112.113 64-bit (WordPress admin panel). 

$ ffmpeg -hwaccel vaapi -ss 25:0 -i 20170817_1115.mp4 -vcodec libx264 -crf 23 -nr 100 -an -filter:v "setpts=0.125*PTS" -r 60 -t 210 clips/08.mp4  
ffmpeg version 3.3.3-3 Copyright (c) 2000-2017 the FFmpeg developers
  built with gcc 7 (Debian 7.1.0-13)
  configuration: --prefix=/usr --extra-version=3 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 58.100 / 55. 58.100
  libavcodec     57. 89.100 / 57. 89.100
  libavformat    57. 71.100 / 57. 71.100
  libavdevice    57.  6.100 / 57.  6.100
  libavfilter     6. 82.100 /  6. 82.100
  libavresample   3.  5.  0 /  3.  5.  0
  libswscale      4.  6.100 /  4.  6.100
  libswresample   2.  7.100 /  2.  7.100
  libpostproc    54.  5.100 / 54.  5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '20170817_1115.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.71.100
  Duration: 01:02:06.03, start: 0.000000, bitrate: 9161 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720, 9091 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 32000 Hz, mono, fltp, 64 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Press [q] to stop, [?] for help
libva info: VA-API version 0.40.0
libva info: va_getDriverName() returns 0
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
libva info: Found init function __vaDriverInit_0_40
libva info: va_openDriver() returns 0
No pixel format specified, nv12 for H.264 encoding chosen.
Use -pix_fmt yuv420p for compatibility with outdated media players.                                                                                                                                                                          
[libx264 @ 0x558776170900] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
[libx264 @ 0x558776170900] profile High, level 3.2
[libx264 @ 0x558776170900] 264 - core 148 r2795 aaa9aa8 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=100 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'clips/08.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.71.100
    Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), nv12, 1280x720, q=-1--1, 60 fps, 15360 tbn, 60 tbc (default)
    Metadata:
      handler_name    : VideoHandler
      encoder         : Lavc57.89.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Past duration 0.749992 too large
frame= 5739 fps= 21 q=-1.0 Lsize=  244001kB time=00:01:35.60 bitrate=20908.5kbits/s dup=0 drop=17206 speed=0.346x