Bug#857552: i965-va-driver: failing to play videos (stops half-way through)

[lkcl]

Package: i965-va-driver
Severity: important
Tags: upstream

i'm getting a video stopping half-way through with the following errors
(reported under vlc):
 - 1.7.3 for hardware decoding.
libva info: VA-API version 0.39.4
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_39
libva info: va_openDriver() returns 0
[00007f16c0d62ff8] avcodec decoder: Using Intel i965 driver for Intel(R) Skylake - 1.7.3 for hardware decoding.
libva info: VA-API version 0.39.4
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_39
libva info: va_openDriver() returns 0
[00007f16c0d62ff8] avcodec decoder: Using Intel i965 driver for Intel(R) Skylake - 1.7.3 for hardware decoding.
libva info: VA-API version 0.39.4
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_39
libva info: va_openDriver() returns 0
[00007f16c0d62ff8] avcodec decoder: Using Intel i965 driver for Intel(R) Skylake - 1.7.3 for hardware decoding.
libva info: VA-API version 0.39.4
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_39
libva info: va_openDriver() returns 0
[00007f16c0d62ff8] avcodec decoder: Using Intel i965 driver for Intel(R) Skylake - 1.7.3 for hardware decoding.
libva info: VA-API version 0.39.4
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_39
libva info: va_openDriver() returns 0
[00007f16c0d62ff8] avcodec decoder: Using Intel i965 driver for Intel(R) Skylake - 1.7.3 for hardware decoding.
[00007f16c0c01978] mkv demux error: Dummy Element at unexpected position... corrupted file?
[00007f16c0c01978] mkv demux error: Dummy element too large or misplaced at 770798513... skipping to next upper element
[00007f16c0c01978] mkv demux error: Dummy Element at unexpected position... corrupted file?
[00007f16c0c01978] mkv demux error: Dummy element too large or misplaced at 772666289... skipping to next upper element
[00007f16c0c01978] mkv demux error: Dummy Element at unexpected position... corrupted file?
[00007f16c0c01978] mkv demux error: Dummy element too large or misplaced at 774009777... skipping to next upper element
[00007f16c0c01978] mkv demux error: This element is outside its known parent... upping level
[h264 @ 0x7f16c0c3f460] co located POCs unavailable
[h264 @ 0x7f16c0c30420] co located POCs unavailable
[h264 @ 0x7f16c0c3f460] co located POCs unavailable
[h264 @ 0x7f16c0c30420] co located POCs unavailable
[h264 @ 0x7f16c0c30420] co located POCs unavailable



-- System Information:
Debian Release: 7.4
  APT prefers testing
  APT policy: (500, 'testing'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.9.0-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash