ofono enable-modem fails with dbus.exceptions.DBusException: org.ofono.Error.Failed: Operation failed

ofono enable-modem fails with dbus.exceptions.DBusException: org.ofono.Error.Failed: Operation failed

[zoltanmaric]

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I'm trying to make Ubuntu 20.04 recognise AirPods Pro as a headset (not just as headphones). I tried to follow the instructions in this AskUbuntu answer: https://askubuntu.com/questions/831331/failed-to-change-profile-to-headset-head-unit/1236379#1236379

list-modems returns the following output:

[ /phonesim ]
    Online = 0
    Powered = 0
    Lockdown = 0
    Emergency = 0
    Interfaces = 
    Features = 
    Type = hardware

But when I try to run the enable-modem command from a freshly checked-out ofono git repo (commit 285fad8f39d46a5f0a0f9d194789978227558d1e), I get the following error:

Connecting modem /phonesim...
Traceback (most recent call last):
  File "./enable-modem", line 20, in <module>
    modem.SetProperty("Powered", dbus.Boolean(1), timeout = 120)
  File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 72, in __call__
    return self._proxy_method(*args, **keywords)
  File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 141, in __call__
    return self._connection.call_blocking(self._named_service,
  File "/usr/lib/python3/dist-packages/dbus/connection.py", line 652, in call_blocking
    reply_message = self.send_message_with_reply_and_block(
dbus.exceptions.DBusException: org.ofono.Error.Failed: Operation failed

What does the error mean, and how could I get around it?

Thanks for your help.

Re: ofono enable-modem fails with dbus.exceptions.DBusException: org.ofono.Error.Failed: Operation failed

[Pavel Machek]

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On Wed 2020-10-14 20:50:51, zoltanmaric(a)pm.me wrote:
> I'm trying to make Ubuntu 20.04 recognise AirPods Pro as a headset (not just as headphones). I tried to follow the instructions in this AskUbuntu answer: https://askubuntu.com/questions/831331/failed-to-change-profile-to-headset-head-unit/1236379#1236379
> 
> list-modems returns the following output:
> 
> [ /phonesim ]
>     Online = 0
>     Powered = 0
>     Lockdown = 0
>     Emergency = 0
>     Interfaces = 
>     Features = 
>     Type = hardware
> 
> But when I try to run the enable-modem command from a freshly checked-out ofono git repo (commit 285fad8f39d46a5f0a0f9d194789978227558d1e), I get the following error:
> 
> Connecting modem /phonesim...
> Traceback (most recent call last):

You are talking to phonesim -- that's software simulator (and quite
useful), but it is not your AirPods.

Best regards,
									Pavel

-- 
http://www.livejournal.com/~pavelmachek

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Re: ofono enable-modem fails with dbus.exceptions.DBusException: org.ofono.Error.Failed: Operation failed

[zoltanmaric]

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Yes, sorry, I should have been clearer on that. The big picture is that I'm trying to make Ubuntu 20.04 recognise AirPods Pro as a headset, and in trying to do so, I've found this AskUbuntu answer: https://askubuntu.com/questions/831331/failed-to-change-profile-to-headset-head-unit/1236379#1236379

In it, the author suggests that
"My earbuds profiles were A2DP, AVRCP and HFP and no support for HSP. Pulseaudio only supports HSP out-of-the-box. That's why I couldn't switch to HSP/HFP. In order to make HSP/HFP work, you have to enable HFP on pulseaudio which needs ofono."

And later, they suggest:
"Provide phonesim to ofono. In order to make ofono work, you have to provide a modem to it! You can install a modem emulator called phonesim (implemented by ofono) to make it work"

And later yet:
"You might have to first enable the modem by executing `enable-modem`"

This is why I tried to run `enable-modem` with phonesim, but I get the error above. Could you please give me some tips to help debug it?

Thanks,
Zoltán