Shearwater petrel + original bluetooth dongle = kernel crash

[Patrick Valsecchi]

Hi,

I have a Shearwater Petrel with the original bluetooth dongle that was 
shipped with the computer.

If I'm lucky, when I try to download the logs, I get a "Slip RX: unexp. 
SLIP END" error. Then, eventually or before I can even get an error 
message, the computer freezes, crashes or switch to text mode displaying 
a big oops. The stacktrace shows some EXT4 functions, but I can't see 
the full thing since I don't know how to scroll back up and I don't 
think it's very useful. Smells like memory corruption done by the kernel 
module handling the dongle. The kern.log isn't much helpful:

...
Sep 17 22:21:01 mega kernel: [  206.581587] usb 1-1.1: new full-speed 
USB device number 6 using ehci-pci
Sep 17 22:21:02 mega kernel: [  206.676221] usb 1-1.1: New USB device 
found, idVendor=0a12, idProduct=0001
Sep 17 22:21:02 mega kernel: [  206.676226] usb 1-1.1: New USB device 
strings: Mfr=0, Product=0, SerialNumber=0
Sep 17 22:23:08 mega kernel: [  333.320186] Bluetooth: TIOCGSERIAL is 
not supported
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@Sep 
17 22:27:48 mega kernel: imklog 5.8.11, log source = /proc/kmsg started.
...

I'm using:
   Subsurface v3.1.1, built with libdivecomputer v0.4.2-devel 
(043fc4166c91572e3b4c0458865de5ffc8f71992)
   Ubuntu 13.04
   Linux 3.8.0-30-generic x86_64

I doubt this is really the right place to report this bug since it seems 
kernel related, but I'm following the instructions in the subsurface 
documentations.

Thanks.