Take the 2-minute tour ×
Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems.. It's 100% free, no registration required.

I have a USB bluetooth dongle:

root@maiko-cce-lin:~# lsusb | grep Bluetooth
Bus 001 Device 007: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)

It rarely works, and when I do get it to work it stops working when I reboot.

It isn't software blocked:

root@maiko-cce-lin:~# rfkill list
0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
1: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no

My device is recognized by hciconfig

root@maiko-cce-lin:~# hciconfig -a
hci0:   Type: BR/EDR  Bus: USB
    BD Address: 00:1F:81:00:01:1C  ACL MTU: 1021:4  SCO MTU: 180:1
    DOWN 
    RX bytes:330 acl:0 sco:0 events:8 errors:0
    TX bytes:24 acl:0 sco:0 commands:30 errors:22
    Features: 0xff 0x3e 0x09 0x76 0x80 0x01 0x00 0x80
    Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3 
    Link policy: 
    Link mode: SLAVE ACCEPT 

but I can't turn on my hci interface:

root@maiko-cce-lin:~# hciconfig hci up
Can't init device hci0: Connection timed out (110)

I don't understand why; the hcitool command doesn't show any devices:

root@maiko-cce-lin:~# hcitool dev
Devices:

I've tried to restart my bluetooth service too with this command (and then repeated all the previous commands again) but it didn't work:

root@maiko-cce-lin:~# service bluetooth restart
 * Stopping bluetooth                                                    [ OK ] 
 * Starting bluetooth                                                    [ OK ] 
root@maiko-cce-lin:~# 

What could be wrong?

share|improve this question
    
Is the dongle supported? –  Johan Jul 21 '11 at 6:22
    
I think it is. You can be sure here: help.ubuntu.com/community/BluetoothSetup#Manual Discovery it's the same device that I have. –  MaikoID Aug 1 '11 at 19:31
add comment

2 Answers

What you describe looks like this reported bug.

share|improve this answer
    
it looks similar but I'm not sure. –  MaikoID Aug 8 '11 at 13:55
add comment

FWIW I just had these same symptoms with the same model dongle. However, it seemed to resolve immediately when I moved the dongle from a USB hub to a direct USB port on the computer. If you're having the same problem then maybe try that.

My symptoms in detail:

Each time the dongle was plugged in I got entries in /var/log/syslog like this:

Sep  7 10:05:20 gus-workstation bluetoothd[18537]: Listening for HCI events on hci0
Sep  7 10:05:20 gus-workstation NetworkManager[837]: <warn> bluez error  getting default adapter: No such adapter
Sep  7 10:05:30 gus-workstation bluetoothd[18538]: Can't init device hci0: Connection timed out (110)

Mine also showed in hciconfig & no amount of restarts or replugs made a difference.

Also weirdly, I can't reproduce the problem now that the dongle has been paired to something (if I put it back in the hub port now, it now works fine.)

Hth.

share|improve this answer
    
I'm not using a USB hub =| but thx for the answer. –  MaikoID Sep 8 '11 at 0:45
    
OK, one more! The "no hub" fix didn't keep working for me, it stopped working as soon as I power cycled the machine. However, I was previously running Ubuntu Maverick (bluez 4.69.) Did a dist-upgrade to Natty (kernel 2.6.38-11, bluez 4.91) and now it works fine. :/ –  projectgus Sep 17 '11 at 0:56
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.