I am experiencing the same problem, however, switching to HSP/HPF and back will not work (when selecting A2DP from the dropdown menu in the audio settings, the output sink switches to internal audio and when reselecting bluetooth it is again in HSP/HPF mode). Only connecting as HSP/HPF and then switching to A2DP will allow for HiFi sound.
I am experiencing the same problem, however, switching to HSP/HPF and back will not work (when selecting A2DP from the dropdown menu in the audio settings, the output sink switches to internal audio and when reselecting bluetooth it is again in HSP/HPF mode). Only connecting as HSP/HPF and then switching to A2DP will allow for HiFi sound.
A more convenient workaround can be found here: https:/ /gist.github. com/pylover/ d68be364adac5f9 46887b85e6ed6e7 ae
Running a2dp.py after connecting fixes the problem.
The page also provides an automated solution using a dbus-loop below. Or you can find an implementation using udev rules here: https:/ /askubuntu. com/questions/ 910501/ udev-rule- to-run- python- script/ 912838# 912838