Hi, Bose QC35 are affected by the attached upgrade notice from Pulseaudio 11. The workaround fixes the problem. -- Sebastian > https://www.freedesktop.org/wiki/Software/PulseAudio/Notes/11.0/ > > Improved bluetooth MTU configuration > > The packet size (a.k.a. MTU, "maximum transmission unit") that > PulseAudio uses with the bluetooth HSP profile was previously > always configured to be 48 bytes. That worked with most hardware, > but some adapters require a different packet size. Now PulseAudio > asks the kernel what packet size should be used, which fixes the > problem. > > However, a new problem appeared: some adapters that used to work > with 48 byte packet size don't any more work with the size that > the kernel tells PulseAudio to use. If you find that HSP audio > stopped working when upgrading to PulseAudio 11.0, you can revert > to the old behaviour by passing option "autodetect_mtu=no" to > module-bluetooth-discover in /etc/pulse/default.pa. If that fixes > the problem, then please report the problem to the BlueZ and/or > PulseAudio developers, so that the kernel can be fixed.
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