[Bug 442424] Re: cellphone recognizes paired Ubuntu computer as headset

Brendan Peterffy 442424 at bugs.launchpad.net
Thu Nov 18 15:14:44 GMT 2010

It's incorrectly assigning the bluetooth class to my dongle as well.
My phone defaults to "headset mode" if the last two bytes of the device class aren't defined, like this:

brendan at OHaiThar:~$ hciconfig -a
hci0:	Type: BR/EDR  Bus: USB
	BD Address: 00:15:83:15:A3:90  ACL MTU: 672:4  SCO MTU: 48:1
	RX bytes:716 acl:0 sco:0 events:26 errors:0
	TX bytes:109 acl:0 sco:0 commands:26 errors:0
	Features: 0xff 0x3e 0x85 0x38 0x18 0x18 0x00 0x00
	Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3 
	Link mode: SLAVE ACCEPT 
	Name: ''
	Class: 0x480000
	Service Classes: Capturing, Telephony
	Device Class: Miscellaneous, 
	HCI Version: 2.0 (0x3)  Revision: 0xc5c
	LMP Version: 2.0 (0x3)  Subversion: 0xc5c
	Manufacturer: Cambridge Silicon Radio (10)

The device class should be 0x480100 or 0x48010C
I've tried changing it in /etc/bluetooth/main.conf but it seems bluez completely disregards the config files.
The sheer lack of documentation is compounding the problem. It seems with every release of bluez all of the previous documentation (That was painstakingly figured out by hand because the bluez developers don't document anything at all) is completely invalidated.
Setting the class by hand works for a few minutes until bluez sets it back to an incorrect value again.
If the original/current developers aren't willing to stop breaking backwards compatibility every time some documentation is made OR document their new releases with information that will help the end user the code should be forked or the Ubuntu team should stick with a version so these insane inconsistencies between releases won't be an issue in the future. </rant>

If anyone has an idea what is causing this nonsense I would be grateful.

cellphone recognizes paired Ubuntu computer as headset
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