update 26/7/2007:
i got it working! a2dp now works and i can stream music from vlc on my desktop to the DS970. it works also with the n800. sweet :)
finally got my hands on the Sony Ericsson HBH DS970 - stereo bluetooth headset. it works automatically with the K800i very well, though on the N70 i need to manually activate the headset by pressing the play button once after connection. sound quality is good as far as i am concerned.
the next thing i wanted to try is to get it working with my t43. why? then i can have wireless music and sound via bluetooth. the SE headset HBH DS970 performs very good as compared to many stereo headset, in my opinion.
some steps i did, despite i did not get it working at my first attempt...
1. install needed packages
# sudo apt-get install bluez-btsco bluez-utils
mos of the packages should be there in the standard installation. if you find any packages that should be added into the list, do tell me.
2. make a scan for the BT address:
# hcitool scan
you should get your headset's hardware address, plus addresses from other hardwares.
3. load the kernel module
# sudo modprobe snd_bt_btsco
4. start btsco with the address you obtain from your headset
# sudo btsco -v xx:xx:xx:xx:xx:xx
i have to stop here because i could not get it done :( however some have success in the ubuntu forum . I would be happy if someone can also tell me what i should do... i keep getting a connection failed with my rfcomm channel after step 4...
links:
1. https://help.ubuntu.com/community/BluetoothSkype
2. http://ubuntuforums.org/showthread.php?t=75978
3. http://www.ubuntuforums.org/showthread.php?t=94713&page=1&pp=20
Comments
Pairing
Make sure your headset is in pairing mode when you issue the hcitool cc [MAC] followed by the hcitool auth [MAC] commands. Otherwise the connection will just drop and pairing will not take place.
try 'sudo hcitool cc
try 'sudo hcitool cc xx:xx:xx:xx:xx:xx' before step 4
i think i did that.
this step i have tried too. I did all the hcitool auth/cc steps but still the same. i suspect the binding part, but from the device it looks pretty ok with the bluetooth pairing. :(