On 2021-10-12 10:15, Jonathan Ryshpan wrote:
The Bluetooth adapter, an old Belkin USB dongle, produces this log message when recognized: Oct 09 22:01:10 amito udisksd[2157]: Mounted /dev/sr0 at /run/media /jonrysh/我的光碟 on behalf of uid 1000
It pretends to be a cdrom drive to provide (Windows) drivers. You might see a USB modeswitch message after that (not sure if that is logged or not).