I'm running Ubuntu 18.04 on a Dell XPS-13 (9350). In order to get the bluetooth working I have to use a proprietary driver (BCM-0a5c-6412.hcd), extracted from a windows driver.
Everything works fine and I'm able to pair all of my devices. However when I wake from suspend, bluetooth headsets won't pair any more. Or more correctly, they pair and then immediately lose connection. This is what shows up in the syslog:
Jul 6 09:19:33 user-XPS-13-9350 pulseaudio: [pulseaudio] backend-native.c: Device doesnt exist for /org/bluez/hci0/dev_0C_E0_E4_6D_1B_CD Jul 6 09:19:33 user-XPS-13-9350 bluetoothd: Headset Voice gateway replied with an error: org.bluez.Error.InvalidArguments, Unable to handle new connection
I found the following things that would restore bluetooth functionality:
- Full reboot (obviously not ideal solution)
- Restart pulseaudio (run
pulseaudio -k). This is better, but when I restart pulseaudio, a lot of apps like Chrome need to be restarted also, because they lose their list of audio input/output devices.