libgl1-amber-dri/libgl1-mesa-dri uninstallable in plucky ISO image builds. Causes build to fail

[Rik Mills]

Sources: mesa-amber 21.3.9-0ubuntu2 and mesa 25.0.1-2ubuntu1
Release: plucky release pocket

In the Ubuntu desktop and flavours ISO image livefs build, the package libgl1-amber-dri fails to be installable by apt causing the build to fail.

For example: https://launchpad.net/~ubuntu-cdimage/+livefs/ubuntu/plucky/ubuntu/+build/765930

The build fails with the error extract at the end of this report.

libgl1-mesa-dri from src:mesa recommends libgl1-amber-dri, so on a normal system libgl1-mesa-dri is installable. However, on ISO image builds recommends are enforced as depends so the failure occurs.

libgl1-amber-dri : Depends: libglapi-mesa (>= 24.0.3), but from plucky libglapi-mesa is a virtual package provided by https://launchpad.net/ubuntu/plucky/amd64/mesa-libgallium/25.0.1-2ubuntu1 without any versioned Depends

**** from build log ****

Solving dependencies...
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 libgl1-amber-dri : Depends: libglapi-mesa (>= 24.0.3)
E: Unable to correct problems, you have held broken packages.
E: The following information from --solver 3.0 may provide additional context:
   Unable to satisfy dependencies. Reached two conflicting decisions:
   1. libgl1-amber-dri:arm64=21.3.9-0ubuntu2 is selected for install
   2. libgl1-amber-dri:arm64 Depends libglapi-mesa (>= 24.0.3)
      but none of the choices are installable:
      [no choices]

**** end of extract ****

[Tim Andersson (andersson123)]

Looking into this ...

[Tim Andersson (andersson123)]

My MP wasn't appropriate, unfortunately! Doh! However, tjaalton is going to drop the Recommends: libgl1-amber-dri from the mesa source package and upload this change with 25.0.2*, as a short term fix for plucky-build failures

[Tim Andersson (andersson123)]

... And, I will handle the appropriate patch to enable us to reinstate the Recommends: libgl1-amber-dri, after the hotfix is out. I've amended the assignment etc to reflect this

[Launchpad Janitor (janitor)]

This bug was fixed in the package mesa - 25.0.1-2ubuntu2

---------------
mesa (25.0.1-2ubuntu2) plucky; urgency=medium

  * control: Drop recommends on libgl1-amber-dri, clean up old
    constraints. (LP: #2103588)
  * patches: Fix spam from gfxstream.

 -- Timo Aaltonen <email address hidden> Thu, 20 Mar 2025 17:03:18 +0200

[Tim Andersson (andersson123)]

@tim to report a bug for the underlying issue in mesa / mesa-amber

[Tim Andersson (andersson123)]

follow up bug https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/2104006