pw-dump command fails in checkbox environment, but it works on local environment

[LiaoU3]

Bug Description

audio/detect_sinks runs pipewire_utils.py. However, it causes subprocess.CalledProcessError when running in checkbox environment. Interestingly, it works in local environment.

In conclusion, it was caused by running pw-dump in checkbox environment.

Cert-blocker Test Case

• cert-blocker #1638

To Reproduce

1. sudo checkbox.shell
2. pw-dump Node

Expected Result

Output a json format text and return code should be 0.

Actual Result

can't create context: No such file or directory

Environment

checkbox                   4.2.0-dev160        10926  24.04/beta       ce-certification-qa  classic
checkbox24                 4.2.0-dev160        392    latest/beta      ce-certification-qa  -

24.04, 24.10
Desktop

ubuntu@ubuntu-Precision-3680:/snap/checkbox24/current/providers/checkbox-provider-base/bin$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 24.10
Release:	24.10
Codename:	oracular

https://certification.canonical.com/hardware/202411-35965/

Relevant log output

ubuntu@ubuntu-Precision-3680:/snap/checkbox24/current/providers/checkbox-provider-base/bin$ ./pipewire_utils.py detect -t audio -c sinks
device id:[53] media.class:[Audio/Sink] node.name:[alsa_output.pci-0000_04_00.0.hdmi-stereo]
device id:[54] media.class:[Audio/Sink] node.name:[alsa_output.pci-0000_00_1f.3.analog-stereo]
ubuntu@ubuntu-Precision-3680:/snap/checkbox24/current/providers/checkbox-provider-base/bin$ sudo checkbox.shell 
checkbox runtime shell, type 'exit' to quit the session
(checkbox-shell) root@ubuntu-Precision-3680:/snap/checkbox24/392/providers/checkbox-provider-base/bin# ./pipewire_utils.py detect -t audio -c sinks
can't create context: No such file or directory
Traceback (most recent call last):
  File "/snap/checkbox24/392/providers/checkbox-provider-base/bin/./pipewire_utils.py", line 721, in <module>
    sys.exit(pw.function_select(pw._args_parsing()))
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/snap/checkbox24/392/providers/checkbox-provider-base/bin/./pipewire_utils.py", line 685, in function_select
    return self.detect_device(args.type, args.clazz)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/snap/checkbox24/392/providers/checkbox-provider-base/bin/./pipewire_utils.py", line 161, in detect_device
    clients = self._get_pw_dump("Node")
              ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/snap/checkbox24/392/providers/checkbox-provider-base/bin/./pipewire_utils.py", line 104, in _get_pw_dump
    pw_dump = subprocess.check_output(
              ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/snap/checkbox24/current/usr/lib/python3.12/subprocess.py", line 466, in check_output
    return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/snap/checkbox24/current/usr/lib/python3.12/subprocess.py", line 571, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command 'pw-dump Node' returned non-zero exit status 255.
(checkbox-shell) root@ubuntu-Precision-3680:/snap/checkbox24/392/providers/checkbox-provider-base/bin# pw-dump Node
can't create context: No such file or directory
(checkbox-shell) root@ubuntu-Precision-3680:/snap/checkbox24/392/providers/checkbox-provider-base/bin# echo $?
255

Additional context

EXternal LP bug link: https://bugs.launchpad.net/kobuk/+bug/2087902

[syncronize-issues-to-jira]

Thank you for reporting us your feedback!

The internal ticket has been created: https://warthogs.atlassian.net/browse/CHECKBOX-1691.

This message was autogenerated

[LiaoU3]

It seems like this problem happens not only on 24.10, but also 24.04.

vincent@vincent-XPS-9320:/snap/checkbox24/current/providers/checkbox-provider-base/bin$ ./pipewire_utils.py detect -t audio -c sinks
device id:[47] media.class:[Audio/Sink] node.name:[alsa_output.pci-0000_00_1f.3-platform-sof_sdw.HiFi__hw_sofsoundwire_7__sink]
device id:[48] media.class:[Audio/Sink] node.name:[alsa_output.pci-0000_00_1f.3-platform-sof_sdw.HiFi__hw_sofsoundwire_6__sink]
device id:[49] media.class:[Audio/Sink] node.name:[alsa_output.pci-0000_00_1f.3-platform-sof_sdw.HiFi__hw_sofsoundwire_5__sink]
device id:[50] media.class:[Audio/Sink] node.name:[alsa_output.pci-0000_00_1f.3-platform-sof_sdw.HiFi__hw_sofsoundwire_2__sink]
device id:[95] media.class:[Audio/Sink] node.name:[bluez_output.2C_18_09_D8_A2_3B.1]
vincent@vincent-XPS-9320:/snap/checkbox24/current/providers/checkbox-provider-base/bin$ echo $?
0
vincent@vincent-XPS-9320:/snap/checkbox24/current/providers/checkbox-provider-base/bin$ sudo checkbox.shell 
checkbox runtime shell, type 'exit' to quit the session
(checkbox-shell) root@vincent-XPS-9320:/snap/checkbox24/441/providers/checkbox-provider-base/bin# ./pipewire_utils.py detect -t audio -c sinks
can't connect: Host is down
Traceback (most recent call last):
  File "/snap/checkbox24/441/providers/checkbox-provider-base/bin/./pipewire_utils.py", line 721, in <module>
    sys.exit(pw.function_select(pw._args_parsing()))
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/snap/checkbox24/441/providers/checkbox-provider-base/bin/./pipewire_utils.py", line 685, in function_select
    return self.detect_device(args.type, args.clazz)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/snap/checkbox24/441/providers/checkbox-provider-base/bin/./pipewire_utils.py", line 161, in detect_device
    clients = self._get_pw_dump("Node")
              ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/snap/checkbox24/441/providers/checkbox-provider-base/bin/./pipewire_utils.py", line 104, in _get_pw_dump
    pw_dump = subprocess.check_output(
              ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/snap/checkbox24/current/usr/lib/python3.12/subprocess.py", line 466, in check_output
    return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/snap/checkbox24/current/usr/lib/python3.12/subprocess.py", line 571, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command 'pw-dump Node' returned non-zero exit status 255.
(checkbox-shell) root@vincent-XPS-9320:/snap/checkbox24/441/providers/checkbox-provider-base/bin# lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 24.04.1 LTS
Release:	24.04
Codename:	noble
(checkbox-shell) root@vincent-XPS-9320:/snap/checkbox24/441/providers/checkbox-provider-base/bin# uname -r
6.8.0-49-generic