"unable to install hw params" to bluetooth (SCO) headset (was: btusb+sco failing to play sound through Jabra BT500v headset)

Hello

I have read Martin's messages concerning his Jabra BT500v bluetooth headset.

I have similar problems with my Jabra JX10 headset.  I have installed 
bluez-4.4. When I run aplay with a 2.6.26 kernel, aplay works. When I 
run aplay with linux 2.6.27-rc5 I can hear a hiss when my PC connects to 
the headset but no music.

I have written a long bug report on 
http://bugzilla.kernel.org/show_bug.cgi?id=11514 with the output of 
hcidump -X -V and the messages from bluetoothd. Could someone have a 
look and give me a hint about what I might be doing wrong? Has anyone 
had any luck with Jabra headsets and 2.6.27-rc5 or should I buy a 
different brand of headset? Marcel Holtmann said that "It simply works 
for me." What headsets have you tested?

aplay always says "Unable to install hw params" after bluetoothd says 
"connect(): Connection timed out (110)" but hcidump shows lots of SCO 
packets being sent to the headset.

thanks
Stuart

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