I was able to reproduce this one today. The port switch (to headphones)
is failing on kernel level with the following message: "Slim close tx/rx
wait timeout" (and subsequent follow-up errors).
I suspect another 'feature' of Qualcomm's kernel driver is that you
can't switch ports while PCMs are running, or you'll get the error
message above. Thus, we need to suspend PulseAudio's PCMs temporarily
while switching ports.
** Changed in: pulseaudio (Ubuntu)
Status: Confirmed => Triaged
** No longer affects: pulseaudio
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https://bugs.launchpad.net/bugs/1227769
Title:
[mako] No audio in the headphones with a two pins jack unless plugged
in after the call
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