[pulseaudio-discuss] [PATCH v13 10/10] bluetooth: policy: Treat bi-directional A2DP profiles as suitable for VOIP

[Tanu Kaskinen]

On Tue, 2019-10-08 at 18:29 +0200, Pali Rohár wrote:
> Automatic SBC profile is not going to be changed. It is there to support
> all devices without any tweaks. ValdikSS already did more tests and
> there are devices which do not work with higher SBC bitpool. So
> increasing max value of bitpool in Automatic SBC profile would lead to
> broken support for these devices and therefore regressions.
> 
> As Automatic SBC profile is the only one available for systems where
> codec switching is not supported, it would mean complete regression as
> these devices completely stops working on those systems.
> 
> Upgrading either pulseaudio or bluez must not lead to problem that some
> bluetooth devices stop working (if they worked before upgrade).
> 
> So no, there would not be any changes in Automatic SBC profile. This one
> should stay untouched, to make it always working with all existing
> devices without any regression.

I wasn't aware that advertising the XQ settings during negotiation
breaks some devices. I guess this means that JP Guillaume's SBC XQ
patch can't be accepted, assuming that we value avoiding regressions
more than the improved quality for most headsets?

Here's that patch: 
https://gitlab.freedesktop.org/pulseaudio/pulseaudio/merge_requests/177

-- 
Tanu

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