Comment 2 for bug 198494

Actually I realized that I had changed some lines on /etc/bluetooth/hcid.conf, if I use Ubuntu's default file.

I get the exact same errors on daemon log as the zdzichu (the bug submitter).

FWIW, I can always manually connect, and disconnect using hcitool:

# hcitool info 00:1D:25:B7:C2:C8
Requesting information ...
        BD Address: 00:1D:25:B7:C2:C8
        Device Name: Samsung WEP300
        LMP Version: 2.0 (0x3) LMP Subversion: 0xd57
        Manufacturer: Cambridge Silicon Radio (10)
        Features: 0xff 0xfe 0x0b 0x00 0x08 0x08 0x00 0x00
                <3-slot packets> <5-slot packets> <encryption> <slot offset>
                <timing accuracy> <role switch> <hold mode> <sniff mode>
                <RSSI> <channel quality> <SCO link> <HV2 packets>
                <HV3 packets> <u-law log> <A-law log> <CVSD> <paging scheme>
                <transparent SCO> <AFH cap. slave> <AFH cap. master>

  # hcitool con
Connections:
        < eSCO 00:1D:25:B7:C2:C8 handle 0 state 8 lm SLAVE