Hello everyone, I have nontdescript usb bluetooth dongle with "V5.0" marking on it. It claims to be CSR (0a12:0001) bluetooth dongle, but it has nonfunctional "delete stored link key" command, so I think it is counterfeit. Futhermore, Linux kernel doesn't detect it as counterfeit (in`btusb_setup_csr`), because the dongle reports following: - From USB enumeration: bcdDevice = 0x8891 - From Read Local Version HCI command: Manufacturer = 0x000a (CSR) HCI ver. = 4.0 HCI rev. = 2064 LMP ver. = 4.0 LMP subver. = 4114 So, Linux kernel fails to power up this dongle. Ok, so I've hacked `btusb_setup_csr` routine to include this device too (it powers up now), however GATT communication doesn't work (btmon should nothing = no ATT exchanges except MTU setup). Any ideas on what should I check to make this device work? Thanks, Andrey