I am running jaunty 9.04  2.6.28-15 with bluez 4.42 and still having issues.
tryied with several kernel ranging from 2.6.27-11 , 2.6.28-11 and 2.6.29.6 with bluez 4.32 and bluez 4.42 having the same results.
Sometimes the dongle is well recognized and can pair, and transfer files, some other times not.
restarting bluetooth (/etc/init.d/bluetooth restart) removing btusb, starting bluetooth again and then insterting the module again seems to work but again, just sometimes.

I've read that there is an actual fix, it seems to be a btusb issue, how can i go back to the previous driver, just by recompiling manuall another kernel?

The configuration that i have now is:
root@redemption:~# uname -a 
Linux redemption 2.6.28-15-generic #49-Ubuntu SMP Tue Aug 18 18:40:08 UTC 2009 i686 GNU/Linux
root@redemption:~# lsusb |grep -i blue
dBus 008 Device 005: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)
root@redemption:~# dpkg -l |grep blue
ii  blueman                                    1.10-1~ppa3j                                               A Graphical bluetooth manager
ii  bluetooth                                  4.42-2                                                     Bluetooth support
ii  bluez                                      4.42-2                                                     Bluetooth tools and daemons
ii  bluez-alsa                                 4.42-2                                                     Bluetooth ALSA support
ii  bluez-audio                                4.42-2                                                     Transitional package
ii  bluez-cups                                 4.42-2                                                     Bluetooth printer driver for CUPS
rc  bluez-gnome                                1.8-0ubuntu5                                               Bluetooth utilities for GNOME
ii  bluez-gstreamer                            4.42-2                                                     Bluetooth GStreamer support
ii  bluez-utils                                4.42-2                                                     Transitional package
ii  gnome-bluetooth                            0.11.0-0ubuntu4                                            GNOME Bluetooth tools.
ii  libbluetooth3                              4.42-2                                                     Library to use the BlueZ Linux Bluetooth stack

Typical message:
root@redemption:~# hciconfig hci0 up
Can't init device hci0: Connection timed out (110)

- After stopping bluetoog (/etc/init.d/bluetooth stop)
- rmmod btusb
- modprobe btusb
I get this:

root@redemption:~# hciconfig dev
hci0:	Type: USB
	BD Address: 00:1F:81:00:02:50 ACL MTU: 1021:4 SCO MTU: 180:1
	UP RUNNING 
	RX bytes:407 acl:0 sco:0 events:18 errors:0
	TX bytes:318 acl:0 sco:0 commands:19 errors:2

root@redemption:~# hcitool inq
Inquiring ...
Inquiry failed.: Connection timed out
- and some syslog errors:
Aug 21 16:34:07 redemption bluetoothd[6915]: bridge pan0 created
Aug 21 16:34:07 redemption bluetoothd[6915]: HCI dev 0 registered
Aug 21 16:34:07 redemption bluetoothd[6915]: HCI dev 0 up
Aug 21 16:34:07 redemption bluetoothd[6915]: Starting security manager 0
Aug 21 16:34:12 redemption bluetoothd[6915]: Can't read class of adapter on /org/bluez/6915/hci0: Connection timed out (110)
Aug 21 16:34:12 redemption kernel: [ 2849.585162] hci_cmd_task: hci0 command tx timeout
Aug 21 16:34:17 redemption bluetoothd[6915]: Sending getting name command failed: Connection timed out (110)
Aug 21 16:34:17 redemption kernel: [ 2854.588101] hci_cmd_task: hci0 command tx timeout
Aug 21 16:34:19 redemption kernel: [ 2855.987346] hci_cmd_task: hci0 command tx timeout
Aug 21 16:34:22 redemption bluetoothd[6915]: Can't read class of device on hci0: Connection timed out (110)

Any help would be appreciated.


thanks.