All autopkgtests for the newly accepted mesa (19.0.8-0ubuntu0~18.04.2) for 
bionic have finished running.
The following regressions have been reported in tests triggered by the package:

vtk6/unknown (armhf)
kf5-messagelib/4:17.12.3-0ubuntu3 (armhf)
firefox/68.0.2+build1-0ubuntu0.18.04.1 (armhf)
openjdk-8/8u222-b10-1ubuntu1~18.04.1 (i386, s390x, arm64, armhf, ppc64el, amd64)

Please visit the excuses page listed below and investigate the failures, 
proceeding afterwards as per the StableReleaseUpdates policy regarding 
autopkgtest regressions [1].


Thank you!

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Touch seeded packages, which is subscribed to mesa in Ubuntu.

  [bionic] drm/i915: softpin broken, needs to be fixed for 32bit mesa

Status in Mesa:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in mesa package in Ubuntu:
  Fix Released
Status in linux source package in Bionic:
  Fix Committed
Status in mesa source package in Bionic:
  Fix Committed
Status in linux source package in Cosmic:
  Won't Fix
Status in mesa source package in Cosmic:
  Fix Released

Bug description:
  Several schools reported black screens after normally updating their Ubuntu 
boxes from 18.0.5-0ubuntu0~18.04.1 to 18.2.2-0ubuntu1~18.04.1.

  Downgrading mesa fixes the problem.

  lspci: 00:02.0 VGA compatible controller [0300]: Intel Corporation HD
  Graphics 530 [8086:1912] (rev 06)         Subsystem: ASUSTeK Computer
  Inc. HD Graphics 530 [1043:8694]    Kernel modules: i915

  Unfortunately I can't find a lot of useful information, here are some bits:
   * systemctl --failed says "gpu-manager" and "lightdm" have failed
   * Xorg.log is clean:
   * dmesg too:
   * It happens on lightdm/MATE, I don't know about Ubuntu GNOME.
   * If one runs `xinit` from ssh, it fails with:
  i965: Failed to submit batchbuffer: Invalid argument

  This is caused by mesa assuming that soft-pinning on GEN8+ is working
  since kernel 4.5, but in fact this issue wasn't fixed until 4.19.3. So
  a proper fix would be to backport commits from 4.19.3/4.20 to fix GTT
  sizes/pin flags, but that's left for future.

  [Test case]
  install fixed mesa or kernel, check that the regression is fixed

  [Regression potential]
  mesa: shouldn't be any, it just reverts the change to always soft-pin
  (TODO kernel: adds commits from upstream stable, which have been well tested 
upstream by now)

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