system settings displays 'cellular' control panel item when no modems are present

[John McAleely]

In bug #1541588 several items were removed from system settings for tablets which have no cellular modem.

In a related bug #1544712 ofono must still be present on such devices, in order for location to work.

It seems that when it was tested, the landing for bug #1541588 happened when ofono was not running.

I conclude therefore that the decision to display/not display cellular is keyed merely on the presence of ofono, rather than, say the count of modems ofono reports.

[John McAleely (john.mcaleely)]

Note that I think the real bug here is bug #1544712 in location service, and we do plan to remove ofono on devices like these (bug #1544210)

of course, there may be other situations, and other devices, where this bug is relevant.

[Ken VanDine (ken-vandine)]

The real bug is probably in ofono, see the output of list-modems from a device without a modem and ofono running:

http://pastebin.ubuntu.com/15024416/

So I think the real bug is that ofono reports a /ril_0 without any interfaces or features

Connectivity API could work around this by assuming the modem isn't real if those values are NULL, but I think it's really an ofono bug.

[Simon Fels (morphis)]

Its a problem in ofono where still creates a modem instance (exposed as /ril_0) without any interfaces registered when the connection to the ril-daemon fails. IMHO ofono should not create the modem instance as long as it can't connect to rild. We agreed on keeping ofono running even on devices which doesn't have a modem.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.