It sounds like the log messages relating to the issue are:
Jul 27 22:54:49 hostname gsd-media-keys[2755]: Unable to get default sink ... Jul 27 22:55:04 hostname bluetoothd[1423]: Unable to get Headset Voice gateway SDP record: Device or resource busy Jul 27 22:55:04 hostname bluetoothd[1423]: connect error: Device or resource busy (16)
Which suggests it's the kernel that's behaving differently, via PulseAudio.
Please try some newer (or older) kernels from:
https://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D
and tell us which versions, if any, avoid the bug.
It sounds like the log messages relating to the issue are:
Jul 27 22:54:49 hostname gsd-media- keys[2755] : Unable to get default sink
...
Jul 27 22:55:04 hostname bluetoothd[1423]: Unable to get Headset Voice gateway SDP record: Device or resource busy
Jul 27 22:55:04 hostname bluetoothd[1423]: connect error: Device or resource busy (16)
Which suggests it's the kernel that's behaving differently, via PulseAudio.
Please try some newer (or older) kernels from:
https:/ /kernel. ubuntu. com/~kernel- ppa/mainline/ ?C=N;O= D
and tell us which versions, if any, avoid the bug.