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[Launchpad Bug Tracker <2061329@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package displaycal-py3 -
3.9.11-2ubuntu0.24.04.1

---------------
displaycal-py3 (3.9.11-2ubuntu0.24.04.1) noble; urgency=medium

  * Patch drop Python runtime version check (LP: #2061329)

 -- Erich Eickmeyer <eeickmeyer@xxxxxxxxxx>  Thu, 30 May 2024 13:00:27
-0700

** Changed in: displaycal-py3 (Ubuntu Noble)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/2061329

Title:
  [SRU] displaycal 3.9.11-2 needs patch to work with Python 3.12

Status in displaycal-py3 package in Ubuntu:
  Fix Released
Status in displaycal-py3 source package in Noble:
  Fix Released
Status in displaycal-py3 source package in Oracular:
  Fix Released

Bug description:
  [Impact]

  DisplayCAL, when released, was only compatible with Python 3.8-3.11.
  However, all it needed was WxWidgets 4.1.1 and a few patches to make
  it work with Python 3.12. Without, it would simply fail. Namely, it
  needed to be patched to remove the Python version check upon launch.

  [Test Case]

   * Install displaycal
   * Run displaycal

  Expected: Run normally
  Result:

  Traceback (most recent call last):
    File "/usr/bin/displaycal", line 4, in <module>
      from DisplayCAL.main import main
    File "/usr/lib/python3/dist-packages/DisplayCAL/main.py", line 27, in <module>
      raise RuntimeError(
  RuntimeError: Need Python version >= 3.8 <= 3.11, got 3.12.2

  [What could go wrong]

  The DisplayCAL developers do not yet support Python 3.12 until the
  release of WxWidgets 4.2.0 since it could crash upon closure. I (Erich
  Eickmeyer) have not experienced this in my testing, however, it is
  plausible. Additionally, the patches that were used to make this work
  were developed after the release of DisplayCAL 3.9.12, but still
  applied cleanly to 3.9.11 and made it function correctly.

  To be clear, the issue with WxWidgets is a separate bug and outside
  the scope of this bug.

  [Other Information]

  Currently the tests have to be skipped otherwise they segfault with
  Python 3.12 and the entire application fails to run, hence the
  inclusion of the patch `05_skip-test-wioth-python-3.12.patch`. I
  would, however, argue that the application running trumps its internal
  tests segfaulting. Furthermore, the upstream developers have yet to
  figure out why those tests are segfaulting on Python 3.12 and
  therefore don't consider it a priority. The goal here is to make the
  application run.

  Original bug report:

  I have upgraded to the noble beta today, and displaycal fails to
  start.

  The package dependencies request python 3.12, but the actual software
  needs 3.11 (or older).

  ```
  $ apt show displaycal | grep Depends

  WARNING: apt does not have a stable CLI interface. Use with caution in
  scripts.

  Depends: libc6 (>= 2.34), libx11-6, libxinerama1 (>= 2:1.1.4),
  libxrandr2 (>= 2:1.2.0), libxxf86vm1, python3 (<< 3.13), python3 (>=
  3.12~), python3-build, python3-certifi, python3-dbus, python3-distro,
  python3-numpy, python3-pil, python3-pychromecast, python3-send2trash,
  python3-wxgtk4.0, python3-zeroconf, python3:any, dbus-x11, argyll,
  libjs-jquery, python3-gi, libsdl2-mixer-2.0-0

  $ displaycal --help
  Traceback (most recent call last):
    File "/usr/bin/displaycal", line 4, in <module>
      from DisplayCAL.main import main
    File "/usr/lib/python3/dist-packages/DisplayCAL/main.py", line 27, in <module>
      raise RuntimeError(
  RuntimeError: Need Python version >= 3.8 <= 3.11, got 3.12.2

  ```

  ProblemType: Bug
  DistroRelease: Ubuntu 24.04
  Package: displaycal 3.9.11-2
  ProcVersionSignature: Ubuntu 6.8.0-22.22-generic 6.8.1
  Uname: Linux 6.8.0-22-generic x86_64
  NonfreeKernelModules: zfs
  ApportVersion: 2.28.0-0ubuntu1
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Apr 14 15:16:10 2024
  ProcEnviron:
   LANG=en_US.UTF-8
   PATH=(custom, no user)
   SHELL=/bin/zsh
   TERM=xterm-256color
   XDG_RUNTIME_DIR=<set>
  SourcePackage: displaycal-py3
  UpgradeStatus: Upgraded to noble on 2024-04-14 (0 days ago)
  mtime.conffile..etc.xdg.autostart.z-displaycal-apply-profiles.desktop: 2023-10-22T21:28:16.420795

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