[Bug 1908023] Re: installation stopped by an exception from mark_install() in Cache class of python3-apt

[Launchpad Bug Tracker]

** Merge proposal linked:
   https://code.launchpad.net/~fourdollars/ubiquity/+git/ubiquity/+merge/395438

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to ubiquity in Ubuntu.
https://bugs.launchpad.net/bugs/1908023

Title:
  installation stopped by an exception from mark_install() in Cache
  class of python3-apt

Status in OEM Priority Project:
  In Progress
Status in OEM Priority Project focal series:
  Confirmed
Status in ubiquity package in Ubuntu:
  New

Bug description:
  LP: #1891599 is for the random and this is for the exception.

  We found some order such as https://paste.ubuntu.com/p/tC25Gt25fY/ for example.
  When libgbm1 is the first package from set(), it will cause the following exception or silently remove some other packages like xserver-xorg-input-libinput, xserver-xorg-input-all and xserver-xorg-video-all like comment #2 & #3.

  Exception in the installation

  Aug 12 19:26:59 ubuntu /plugininstall.py: Exception during installation:
  Aug 12 19:26:59 ubuntu /plugininstall.py: Traceback (most recent call last):
  Aug 12 19:26:59 ubuntu /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 235, in run
  Aug 12 19:26:59 ubuntu /plugininstall.py: self.install_extras()
  Aug 12 19:26:59 ubuntu /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1212, in install_extras
  Aug 12 19:26:59 ubuntu /plugininstall.py: self.do_install(filtered_extra_packages)
  Aug 12 19:26:59 ubuntu /plugininstall.py: File "/usr/lib/ubiquity/ubiquity/install_misc.py", line 941, in do_install
  Aug 12 19:26:59 ubuntu /plugininstall.py: mark_install(cache, pkg)
  Aug 12 19:26:59 ubuntu /plugininstall.py: File "/usr/lib/ubiquity/ubiquity/install_misc.py", line 553, in mark_install
  Aug 12 19:26:59 ubuntu /plugininstall.py: raise InstallStepError(
  Aug 12 19:26:59 ubuntu /plugininstall.py: ubiquity.install_misc.InstallStepError: Unable to install 'libgbm1' due to conflicts.

  This happen in oem project because we have lots pkg to upgrade during
  installation because the design of factory process need it.

  As package list have certain dependency, and the the order that we get
  the pkg from the python set object is not good for underlying apt
  engine, then exception will raise.

To manage notifications about this bug go to:
https://bugs.launchpad.net/oem-priority/+bug/1908023/+subscriptions