Bug#827983: libva1: upgrade to va 1.7.1 breaks intel graphics

[Norbert Preining]

Package: libva1
Version: 1.7.1-1
Severity: grave
Justification: renders package unusable

Dear all,

after today's upgrade of all packages, including all the va related
to 1.7.1-1, my intel-based laptop started behaving strangly:
* color artefacts (flashing pop colors) on screen
* redrawing of applications full of failures (no redrawing in many cases!)

After downgrading the following packages to the 1.7.0-2 versions
behaviour is back to normal - but I am not sure whether this is
the minimal set:
	i965-va-driver
	libva1
	va-driver-all

all other va related packages are at still at 1.7.1
	libva-drm1
	libva-egl1
	libva-glx1
	libva-tpi1
	libva-wayland1
	libva-x11-1

I checked the system logs (journal) and X org logs for suspicious
things, without success.

Please let me know if I can provide further information

All the best

Norbert


-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (300, 'testing'), (200, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.7.0-rc4+ (SMP w/4 CPU cores; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages libva1 depends on:
ii  libc6  2.22-12

Versions of packages libva1 recommends:
ii  i965-va-driver [va-driver]   1.7.0-1
ii  va-driver-all                1.7.0-2
ii  vdpau-va-driver [va-driver]  0.7.4-6

libva1 suggests no packages.

-- no debconf information