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WWAN: issues with non connected interface / no signal
Closed, ResolvedPublicBUG


This is a summary task for multiple issues:

  • Signal strength can not be read while interface is disconnected
[email protected]# run show interfaces wwan wwan0 signal
Traceback (most recent call last):
  File "/usr/libexec/vyos/op_mode/", line 68, in <module>
    qmi_cmd(cdc, '--nas-get-signal-info')
  File "/usr/libexec/vyos/op_mode/", line 37, in qmi_cmd
    tmp = cmd(f'qmicli --device={device} --device-open-proxy {command}')
  File "/usr/lib/python3/dist-packages/vyos/", line 161, in cmd
    raise OSError(code, feedback)
PermissionError: [Errno 1] failed to run command: qmicli --device=/dev/cdc-wdm0 --device-open-proxy --nas-get-signal-info
exit code: 1


Difficulty level
Hard (possibly days)
Why the issue appeared?
Implementation mistake
Is it a breaking change?
Perfectly compatible
Issue type
Bug (incorrect behavior)

Event Timeline

c-po changed the task status from Open to In progress.Sep 3 2021, 7:52 AM
c-po claimed this task.
c-po triaged this task as Low priority.
c-po created this task.
c-po changed Difficulty level from Normal (likely a few hours) to Hard (possibly days).
c-po changed Why the issue appeared? from Will be filled on close to Implementation mistake.
c-po moved this task from Need Triage to Finished on the VyOS 1.4 Sagitta board.
c-po moved this task from Backlog to Finished on the VyOS 1.3 Equuleus (1.3.0) board.