[Bug 2034986] Re: some text became unreadable during a distribution upgrade

[Gunnar Hjalmarsson]

Gunnar Hjalmarsson wrote:
> Maybe it would be sufficient to drop the Ubuntu font as the first choice and
> simply let fontconfig deal with it for everyone.

I tested that approach. On an updated lunar I run this command:

gsettings set org.gnome.desktop.interface font-name 'Sans 11'

before doing "update-manager -d". The upgrade completed successfully
without font rendering issues.

So as a workaround I'm thinking that an equivalent of that command could
be added to the beginning of the main function in DistUpgradeViewGtk3.py
file (before the first "Gtk.main()" call), while the equivalent of this
command:

gsettings reset org.gnome.desktop.interface font-name

could be executed right before the computer is restarted.

Or maybe just a wrapper.

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https://bugs.launchpad.net/bugs/2034986

Title:
  some text became unreadable during a distribution upgrade

Status in ubuntu-meta package in Ubuntu:
  Confirmed
Status in ubuntu-release-upgrader package in Ubuntu:
  Confirmed
Status in ubuntu-meta source package in Mantic:
  Confirmed
Status in ubuntu-release-upgrader source package in Mantic:
  Confirmed

Bug description:
  I was upgrading from Lunar to Mantic the other day and left a couple
  of applications open during the upgrade process. During the upgrade
  the text in audacious became unreadable (I'll attach a screenshot) and
  I seem to recall the title bar of Firefox being unreadable but the
  contents of web pages still being readable.

  ProblemType: Bug
  DistroRelease: Ubuntu 23.10
  Package: ubuntu-release-upgrader-core 1:23.10.5
  ProcVersionSignature: Ubuntu 6.5.0-4.4-generic 6.5.0
  Uname: Linux 6.5.0-4-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia zfs
  ApportVersion: 2.27.0-0ubuntu2
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Sep  8 15:39:27 2023
  InstallationDate: Installed on 2018-08-10 (1855 days ago)
  InstallationMedia: Ubuntu-Server 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to mantic on 2023-09-06 (2 days ago)
  VarLogDistupgradeAptclonesystemstate.tar.gz: Error: command ['pkexec', 'cat', '/var/log/dist-upgrade/apt-clone_system_state.tar.gz'] failed with exit code 126: Error executing command as another user: Request dismissed
  VarLogDistupgradeTermlog:
   
  mtime.conffile..etc.update-manager.meta-release: 2021-05-27T16:30:16.970490

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