Public bug reported:

Installed Lubuntu 14.04 i386.
I used the apt line for all HWE updates from the ubuntu wiki, to update each 
stack manually.  E.g., for xenial:
sudo apt-get install --install-recommends linux-generic-lts-xenial 
xserver-xorg-core-lts-xenial xserver-xorg-lts-xenial 
xserver-xorg-video-all-lts-xenial xserver-xorg-input-all-lts-xenial 
libwayland-egl1-mesa-lts-xenial
( https://wiki.ubuntu.com/Kernel/LTSEnablementStack#Desktop )

* The kernel stacks updated with no problem.
* When I try to update the graphics HWE stack from *-vivid to *-willy or 
*-xenial, apt wants to uninstall a lot of stuff, among them:
abiword libabiword-3.0 audacious audacious-plugins lubuntu-desktop

I did the update with the Xenial stack anyway, and tried to find the
problem while installing uninstalled (non-lib) stuff back.

Worked my way to libgbm1 through "X depends on Y, but it is not going to
be installed" errors.

libgbm1 has libgbm1-lts-* versions, and libgbm1-lts-xenial
(11.2.0-1ubuntu2~trusty1) got installed with the xenial HWE stack.

I noticed that some packages, e.g. libgbm1 and mesa-vdpau-drivers stayed
installed although they both have -lts-* versions.


1) Shouldn't the libgbm1-lts-* packages (that do not depend on libgbm1) provide 
libgbm1?

http://answers.ros.org/question/203610/ubuntu-14042-unmet-dependencies-similar-for-14043/
looks connected, but their solution -- to also install some -dev-lts-* pkgs -- 
seems like more of a workaround if they rebuilt the pkg, and I don't think it 
will help a more complex dependency problem.


2) Did I update the stack incorrectly? Is there a better/automated/reliable 
method?

Aside from libgbm1, the base mesa-vdpau-drivers stayed installed even
though I upgraded up to the vivid graphics stack---probably mesa-vdpau-
drivers-lts-* was missing from the apt line because it is not necessary
to have installed (not all systems can or want to do vdpau accel)?

** Affects: mesa-lts-xenial (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: lubuntu trusty

-- 
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to mesa-lts-xenial in Ubuntu.
https://bugs.launchpad.net/bugs/1620092

Title:
  Lubuntu 14.04 HWE update problem: libgbm1-lts-xenial does not provide
  libgbm1

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