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[Marco Trevisan (Treviño) <mail@xxxxxxxxx>]

I'm happy to do it in any package postinst, I was thinking more to keep
it somehwere under the desktop team control, as it's something we should
care about, while I prefer to have it fixed at least to anyone who has
installed ubuntu-desktop.

But I agree it's wrong also for other people using desktop under X11
(and who might have just tried unity in the past), so staying lower is
fine.

If mesa is fine to accept this, I'm happy to do it.

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https://bugs.launchpad.net/bugs/1768610

Title:
  leftover conffile forces GNOME is software rendering

Status in mesa package in Ubuntu:
  New
Status in nux package in Ubuntu:
  Fix Released
Status in mesa source package in Xenial:
  New
Status in nux source package in Xenial:
  In Progress
Status in mesa source package in Artful:
  New
Status in nux source package in Artful:
  In Progress
Status in mesa source package in Bionic:
  New
Status in nux source package in Bionic:
  In Progress

Bug description:
  After an upgrade from 17.10 to 18.04, I noticed that all gnome windows
  animations were gone.  After some digging, it seems that gnome-session
  incorrectly assumes that my graphics has no acceleration, when in fact
  it does: it's a i5-2520M CPU @ 2.50GHz with Intel integrated graphics
  (i915 driver).

  I've tried this with and without the xserver-xorg-video-intel package
  (a.k.a. Intel driver) with the same behavior.

  The output of gnome-session-check-accelerated is: llvmpipe (LLVM 6.0,
  256 bits)  however the system should have DRM 2.0 capability.

  GL checks (e.g. glxinfo, glxgears produce the expected output from a
  working DRM system).

  mesa-utils and mesa-utils-extra are both installed.

  I can't find a work around.  Perhaps there is something wrong with my
  install/upgrade?

  Everything else works fine, although the graphical transitions are no
  longer smooth.  But it would be nice to restore the expected behavior.

  I have attached the log of 'journalctl -b0'

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: gnome-session 3.28.1-0ubuntu2
  ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
  Uname: Linux 4.15.0-20-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Wed May  2 13:06:00 2018
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2016-04-22 (739 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  ProcEnviron:
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: gnome-session
  UpgradeStatus: Upgraded to bionic on 2018-04-27 (5 days ago)

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