Hi Luiz, On Wed, Nov 15, 2017, Luiz Augusto von Dentz wrote: > > Frequently when I connect my Android phone to my bluez 5.47 device I > > see (btmon): > > > > > HCI Event: Number of Completed Packets (0x13) plen 5 > > > > #36 [hci0] > > 5.709020 > > Num handles: 1 > > Handle: 1 > > Count: 1 > > < ACL Data TX: Handle 1 flags 0x00 dlen 16 > > > > #37 [hci0] > > 5.714589 > > L2CAP: Connection Response (0x03) ident 4 len 8 > > Destination CID: 64 > > Source CID: 81 > > Result: Connection refused - security block (0x0003) > > Status: No further information available (0x0000) > > > > This is using connecting from Android 7 to Bluez 5.47. > > I think this might be due to not having a default agent set which is > needed if the devices is not trusted so it would require agent > authorization. It could also be the USB HCI race between ACL data and HCI events. It's hard to say for sure though since the complete HCI log was not provided. Johan -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html