I've set up the mouse according to this document: https://gist.github.com/david-moran/1a9e4f910749d66d93e3fa71f3f68c98
It worked right after the mouse was configured, but never worked after reboot.
System log gets a lot of such messages when the mouse is turned on:
> mode_change: ubt0hci - failed to change mode, status=32
Mouse: Microsoft Sculpt Touch Bluetooth Mouse
Three daemons are running: hcsecd, sdpd, bthidd.
/etc/bluetooth has these files:
bthidd.conf hcsecd.conf hosts protocols
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