[Bug 1700848] [NEW] Install mesa-utils-extra by default

[Jeremy Bicha]

Public bug reported:

Since Ubuntu 16.10, mesa-utils has been installed by default (I think this is because libqt5gui5 Recommends: mesa-utils). mesa-utils provides these binaries:
glxdemo
glxgears
glxheads
glxinfo

For 17.10, Ubuntu plans to switch to GNOME on Wayland as default (or at least installed by default desktop). glxgears can run in GNOME on Wayland but it is running under XWayland instead of using native Wayland. mesa-utils-extras provides these binaries:
es2_info
es2gears_wayland
es2gears_x11
es2tri
(By the way, es2gears is symlinked to es2gears_x11).

So if a user wants to test whether Wayland is running successfully, they
can try to run es2gears_wayland. If Wayland is not running, the app will
not start.

Therefore, I propose that we install the minimal mesa-utils-extra by
default as a fun troubleshooting tool. mesa-utils-extra is built from
the same source as mesa-utils (mesa-demos) so all we need is to add this
as a Recommends from ubuntu-desktop.

** Affects: ubuntu-meta (Ubuntu)
     Importance: Wishlist
         Status: New


** Tags: artful wayland

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https://bugs.launchpad.net/bugs/1700848

Title:
  Install mesa-utils-extra by default

Status in ubuntu-meta package in Ubuntu:
  New

Bug description:
  Since Ubuntu 16.10, mesa-utils has been installed by default (I think this is because libqt5gui5 Recommends: mesa-utils). mesa-utils provides these binaries:
  glxdemo
  glxgears
  glxheads
  glxinfo

  For 17.10, Ubuntu plans to switch to GNOME on Wayland as default (or at least installed by default desktop). glxgears can run in GNOME on Wayland but it is running under XWayland instead of using native Wayland. mesa-utils-extras provides these binaries:
  es2_info
  es2gears_wayland
  es2gears_x11
  es2tri
  (By the way, es2gears is symlinked to es2gears_x11).

  So if a user wants to test whether Wayland is running successfully,
  they can try to run es2gears_wayland. If Wayland is not running, the
  app will not start.

  Therefore, I propose that we install the minimal mesa-utils-extra by
  default as a fun troubleshooting tool. mesa-utils-extra is built from
  the same source as mesa-utils (mesa-demos) so all we need is to add
  this as a Recommends from ubuntu-desktop.

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