Suggestions for Linux-friendly BLE dongle?

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fanoush
It probably differs between linux distros, however even with no firmware present on disk you should see lines similar to those
```
[ 1368.955155] Bluetooth: hci0: RTL: examining hci_ver=0a hci_rev=000b lmp_ver=0a lmp_subver=8761
[ 1368.956133] Bluetooth: hci0: RTL: rom_version status=0 version=1
[ 1368.956136] Bluetooth: hci0: RTL: loading rtl_bt/rtl8761bu_fw.bin
[ 1368.956155] bluetooth hci0: firmware: failed to load rtl_bt/rtl8761bu_fw.bin (-2)
```
when bluez tries to use the device. You mentioned ubuntu 20.04, that is quite old, I use 22.04 and it is directly in /lib/firmware like in the edimax zip, anyway you can try to put that file to your location.

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