[Bug 1506340] [NEW] Multimedia audio is routed for half of a second through HFP SCO after call has ended

[Simon Fels]

Public bug reported:

When playing audio through A2DP and a call comes in, gets accepted and
finishes after some time the multimedia audio will start again after the
call but is played for half of a second either through the phone speaker
or HFP SCO channel rather than only being played again through A2DP as
it was before the call.

This happens with BlueZ 4.x and 5.x and is related to how we handle the
audio routing setup currently.

The telepathy-ofono service currently switches the different ports,
sinks, sources and profiles of our PulseAudio elements to enable
everything needed to do a voicecall and to switch things back correctly
once the voicecall is done. The issue described above is the result of
either a incorrect sequence of enabling/disbling things or bound to
timing issues when the switching is done.

We need to do some more analysis on the routing in PulseAudio and how
telepathy-ofono does things.

** Affects: canonical-devices-system-image
     Importance: Undecided
         Status: New

** Affects: bluez (Ubuntu)
     Importance: Undecided
     Assignee: Simon Fels (morphis)
         Status: New

** Affects: pulseaudio (Ubuntu)
     Importance: Undecided
     Assignee: Simon Fels (morphis)
         Status: New

** Affects: telepathy-ofono (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: bluetooth bluez5

** Also affects: telepathy-ofono (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: pulseaudio (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: pulseaudio (Ubuntu)
     Assignee: (unassigned) => Simon Fels (morphis)

** Changed in: bluez (Ubuntu)
     Assignee: (unassigned) => Simon Fels (morphis)

** Also affects: canonical-devices-system-image
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1506340

Title:
  Multimedia audio is routed for half of a second through HFP SCO after
  call has ended

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