[Bug] ros-lyrical-desktop fails to install on Ubuntu 26.04 (Resolute) via ros2-testing repository (dpkg error code 1)

[aryanjagushte]

Generated by Generative AI

Gemini Pro 3.1

Operating System:

Ubuntu 26.04 LTS (Resolute Raccoon) running via Docker (rocker --x11 ubuntu:26.04)

ROS version or commit hash:

lyrical (testing repository / pre-release)

RMW implementation (if applicable):

No response

RMW Configuration (if applicable):

No response

Client library (if applicable):

No response

'ros2 doctor --report' output

ros2 doctor --report

<COPY OUTPUT HERE>

Steps to reproduce issue

1. Start a fresh Ubuntu 26.04 container (rocker --x11 ubuntu:26.04).
2. Follow the official Lyrical Ubuntu Debian installation steps to set up locales and add the GPG key.
3. Add the testing repository instead of the main release repository:
   echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/ros-archive-keyring.gpg] http://packages.ros.org/ros2-testing/ubuntu resolute main" | tee /etc/apt/sources.list.d/ros2.list > /dev/null
4. Run apt update
5. Run apt install ros-lyrical-desktop -y

Expected behavior

The ros-lyrical-desktop package should install and configure successfully, allowing the user to source /opt/ros/lyrical/setup.bash.

Actual behavior

The download succeeds, but the extraction/configuration phase crashes, citing "too many errors." Running dpkg --configure -a or apt --fix-broken install yields the exact same failure, leaving the base environment broken.

Terminal Output:

python3-inflect
libpyside6-py3-6.10
libshiboken6-dev
unattended-upgrades
python3-pycodestyle
python3-pygments
ros-lyrical-ament-cmake-core
python3-rosdistro-modules
python3-packaging
python3-oauthlib
Processing was halted because there were too many errors.
Error: Sub-process /usr/bin/dpkg returned an error code (1)

Additional information

I encountered this while attempting to set up an OS: Resolute / Chip: AMD64 / Build: Binary environment to test Issue #3103 for the Lyrical Tutorial Party. This dependency bug completely blocks the installation, meaning the tutorial tests cannot be completed on this platform yet.

[aryanjagushte]

Tutorial Test: BLOCKED (Python 3.14 Packaging Bug)

Environment: osrf/ros:lyrical-desktop-full (Ubuntu 26.04 / Python 3.14.4)

I am unable to fully verify the tf2 listener tutorial due to an underlying ament_python build issue in the nightly image.

While the package builds successfully with colcon, executing the nodes via ros2 run or ros2 launch immediately results in:
ModuleNotFoundError: No module named 'learning_tf2_py.turtle_tf2_broadcaster' (and the same for the listener).

The Python 3.14 setuptools update appears to be breaking how colcon installs and links the entry points for Python modules. The tutorial text itself looks correct, but it cannot be executed by users until this environment bug is patched.

[kscottz]

@cottsay possible issue that may or may not be fixed.

@aryanjagushte I'll send it to the board.

[aryanjagushte]

Okay, @kscottz.
Thanks for taking it