[Bug 930848] [NEW] USB BT dongle freezes machine

[KeithG]

Public bug reported:

new BT dongle is very flaky. If it will pair, whenever it is used to
send any data, it freezes the machine (flashing caps lock and num lock
leds). The only way to get it back is to press and hold the power
button. I have 2 other dongles which work fine. It announces itself as a
"ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)"
like the another one I have. I have been able to make it work under Win7
x64.

usb-devices reports more information:
T:  Bus=04 Lev=01 Prnt=01 Port=03 Cnt=01 Dev#=  9 Spd=12  MxCh= 0
D:  Ver= 2.00 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=0a12 ProdID=0001 Rev=19.15
C:  #Ifs= 2 Cfg#= 1 Atr=c0 MxPwr=0mA
I:  If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
I:  If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb

The key is the Rev 19.15. This one does not work I have another one
which reports Rev 01.34 and it works fine.

I have seen this showing up around the web. The compatibility lists all
list Cambridge Silicon Radio, Ltd 0a12:0001, but not all of these
devices that report this are the same, or so it appears.  Don't know if
it just because it is a BT 2.0 and it is incorrectly assigned a driver.

This is on Ubuntu 11.10 x64

This is with gnome-bluetooth or Bluetooth-manager

I got a freeze, I expected a connection and a file transfer

** Affects: gnome-bluetooth (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/930848

Title:
  USB BT dongle freezes machine

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