Regression: Intrepid bluetooth serial connection not working

[mistr]

I use a GPS mouse which sends its data in ASCII format via a bluetooth serial link to my laptop. The bluetooth capability is provided by an USB dongle. This worked under Hardy, it stopped working under Intrepid.

(Intrepid) Kernel: 2.6.27-7-generic #1 SMP
lsusb of the dongle: ID 1131:1004 Integrated System Solution Corp. Bluetooth Device

Commands issued on Hardy and Intrepid resulting in the same output:

me@hardy:~$ sudo hcitool scan
Scanning ...
 00:02:C7:7D:F5:17 BlueGPS 7DF517
me@hardy:~$ sudo rfcomm bind /dev/rfcomm0 00:02:C7:7D:F5:17 1
me@hardy:~$ ls -l /dev/rfcomm0
crw-rw---- 1 root dialout 216, 0 2008-12-14 23:15 /dev/rfcomm0

If I try to open that device (e.g. in Python: a = open("/dev/rfcomm0","r") ), the function call is successful under Hardy and I can read the ASCII data stream. Under Intrepid, I get an IOError when I try to open the device.

The only hint in the Intrepid syslog is:

Dec 14 23:25:56 intrepid bluetoothd[6095]: Adapter /org/bluez/hci0 has been enabled
Dec 14 23:25:56 intrepid bluetoothd[6095]: Starting security manager 0
Dec 14 23:28:26 intrepid kernel: [ 496.724082] hci_cmd_task: hci0 command tx timeout

[jebblue (jebblue)]

On 8.10 on my main machine I also get "hci_cmd_task: hci0 command tx timeout" and Bluetooth worked fine in 8.04 and 7.10 on this machine. It works fine though, in 8.10 on two of my laptops both different manufacturers.

[Sami Mäkinen (sami-makinen-helsinki)]

Sounds like the same issue as https://bugs.launchpad.net/ubuntu/+source/linux/+bug/281949