I'm trying to connect WinXP with 5.3-STABLE via Bluetooth using USB dongles. I followed Handbook, set up and started rc.bluetooth, hcsecd, sdpd and rfcomm_pppd. My dongle is recognized, pairing goes well. Connection from WinXP to FreeBSD can be always established but when I'm trying to send any data over this connection, it drops very soon with the following diagnostics: Jan 22 21:34:49 elrond kernel: ng_ubt_rcvdata: ubt0 - Dropping HCI frame 0x4, len=124. Queue full Jan 22 21:34:49 elrond kernel: ng_ubt_rcvdata: ubt0 - Dropping HCI frame 0x4, len=13. Queue full Jan 22 21:34:49 elrond kernel: ng_ubt_rcvdata: ubt0 - Dropping HCI frame 0x4, len=124. Queue full Jan 22 21:34:49 elrond last message repeated 3 times Jan 22 21:34:49 elrond kernel: ng_ubt_rcvdata: ubt0 - Dropping HCI frame 0x4, len=13. Queue full Jan 22 21:47:37 elrond kernel: ng_ubt_rcvdata: ubt0 - Dropping HCI frame 0x6, len=124. Queue full Jan 22 21:47:37 elrond kernel: ng_ubt_rcvdata: ubt0 - Dropping HCI frame 0x6, len=13. Queue full Jan 22 21:47:37 elrond kernel: ng_ubt_rcvdata: ubt0 - Dropping HCI frame 0x6, len=124. Queue full Jan 22 21:47:37 elrond last message repeated 2 times Jan 22 21:47:37 elrond kernel: ng_ubt_rcvdata: ubt0 - Dropping HCI frame 0x6, len=13. Queue full Jan 22 21:47:46 elrond kernel: ng_btsocket_rfcomm_session_send: Could not send data to L2CAP socket, error=40 Jan 22 21:47:46 elrond kernel: ng_l2cap_l2ca_receive: ubt0l2cap - unexpected L2CAP data packet. Invalid channel state, cid=75, state=5 I tried to reduce MTU and MRU for ppp down to 512. It helped a bit - connection was alive a bit longer. Then again, connection dropped with the above diagnostics. Just have no idea where to dig further. Regards, Petr