I've recently bought this Bluetooth dongle for my PC: https://smile.amazon.de/gp/product/B07BFS94X4/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
But the PC doesn't seem to recognise it. The Bluetooth On/Off switch in the settings app is non-functional. In accordance to some other answers here, I installed Blueman (which I had also used on older machines). But it gives me an error message when I start it, even if I start Bluetooth via the Terminal beforehand.
Curiously, lsusb gives the same output with or without the dongle plugged in.
Edit 1: dmesg yields lots of
[22043.878231] RTW: rtw_set_ps_mode(wlx0013eff115a2) Enter 802.11 power save - WIFI-TRAFFIC_IDLE [22043.878235] RTW: rtl8822b_set_FwPwrMode_cmd(wlx0013eff115a2): HW port id=0 [22043.878238] RTW: rtl8822b_set_FwPwrMode_cmd(wlx0013eff115a2): fw ps mode = LPS, drv ps mode = 2, rlbm = 1 , smart_ps = 2, allQueueUAPSD = 0 [22045.894292] RTW: rtw_set_ps_mode(wlx0013eff115a2) Leave 802.11 power save - WIFI-TRAFFIC_BUSY [22045.894296] RTW: rtl8822b_set_FwPwrMode_cmd(wlx0013eff115a2): HW port id=0 [22045.894298] RTW: rtl8822b_set_FwPwrMode_cmd(wlx0013eff115a2): fw ps mode = ACTIVE, drv ps mode = 0, rlbm = 0 , smart_ps = 0, allQueueUAPSD = 0
Edit 2: lsusb yields
Bus 004 Device 002: ID 1bcf:2c99 Sunplus Innovation Technology Inc. Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 003 Device 002: ID 0bda:b812 Realtek Semiconductor Corp. Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 04d9:fa58 Holtek Semiconductor, Inc. Bus 001 Device 002: ID 125f:9318 A-DATA Technology Co., Ltd. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Edit 3: I ran both lsusb and dmesg after a reboot without the WiFi Dongle with and without the Bluetooth dongle in. lsusb doesn't seem to yield any difference. Neither does dmesg, though it's still hundreds of lines so I'm not 100% sure. I'm starting to get the impression that the device is simply broken. I uploaded the dmesg results in some text files, links in comment below. I also opened a googledoc with both results in: https://docs.google.com/document/d/1qSzLURsEOLgQgDkaENYOexY4Hre_gNf7YULdKT_zdqE/edit?usp=sharing
Edit 4: I ran diff with the two outputs from dmesg, and it didn't give any result, i.e. there was no difference found.