IN CAR: Signal Strength not shown in car display

[Dave Morley]

STEPS:
Requirement: DUT with active sim and car that supports Bluetooth phones (Skoda Superb 2013 in my case)

1. Connect the DUT to the car
2. Check the console display for the strength of signal

EXPECTED:
I expect the display to show a similar strength to that on the phone

ACTUAL:
The signal strength is always at 0% however the display does show the Network connected to so there is some sort of feedback via bluetooth that there is a connection.

VERSIONS:
current build number: 71
device name: arale
channel: ubuntu-touch/rc-proposed/meizu.en
last update: 2015-07-28 18:01:08
version version: 71
version ubuntu: 20150728
version device: 20150709-8965e37
version custom: 20150716-819-8-42

MODIFICATIONS:
Installation of silo19 for in car bt fix

[Simon Fels (morphis)]

This comes from the fact that our BlueZ version still relies on an older API version of ofono as we have implemented. It listens for changes to a "SignalStrength" property on the org.ofono.NetworkRegistration interface which doesn't exist. The propery is named just "Strength" these days. See https://bazaar.launchpad.net/~ubuntu-branches/ubuntu/wily/bluez/wily/view/head:/audio/telephony-ofono.c#L922 and https://github.com/rilmodem/ofono/blob/master/doc/network-api.txt#L127 for more details.

[Sebastien Bacher (seb128)]

So update the property like that should be enough?

[Sebastien Bacher (seb128)]

Simon, do you think the change should be enough? I'm going to try to build a test package and give that a go today

[Simon Fels (morphis)]

It should.

[Pat McGowan (pat-mcgowan)]

Seb if you get a silo let me know I can test

[Sebastien Bacher (seb128)]

https://launchpad.net/ubuntu/+source/bluez/4.101-0ubuntu27

  * debian/patches/use_correct_signal_strength.patch:
    - use correct signal name for telephony signal strength coming from ofono

[John McAleely (john.mcaleely)]

Has this landed in the vivid-overlay ppa?

[Michał Sawicz (saviq)]

I found this working in my car with rc-proposed, so it must've landed in the overlay?

[Simon Fels (morphis)]

It did.