ehmm... Returning to the issue with bluetooth connection, i have found out that all the problem is somehow connected to the idle timeout of bt connection. It means that lags starting only after some time of being idle, so if you are listening to music nonstop for hours you wont have any issues at all. However if you leave the headset connected being idle for about 20 min it will just lose the headset mode (icon in the status bar disappear) and will play lq music with no headset functions.

So the idea is that after 7-10 minutes of being idle bt connection automatically leaves headset mode.
And exactly when it starts happening, these lags that I described before can be seen.

Well, anyway could someone clarify: does the bt patch that came out with kp47 have sth to do with this idle timeout or not and if it does it would be nice to see some fix.

Considering pali`s the last post about this, i tried to enter those commands when lags were starting (with root access of course), but there were simply no output and the problem still persist (though i do understand that these commands were not for fixing, just to see error info, ain`t it?). hmm... How exactly they are supposed to work?

Just another interesting fact that i found out: once connected and not being used at all bt headset remains ok for unlimited amount of time, however if press play/pause the lags will follow after ~5 mins and if left unchecked - headset is just leaving headset mode after~10 minutes.

One last observation that i`ve made: I have deinstalled kp completely, and while running standart nokia kernel there were no issues at all with bt. Than i installed kp v46 that was ok for me beforehand. However as i got kp46 the problem appears which is very confusing to me. (So basically downgrading kernel isn`t a solution).

I don`t exactly know what it means but perhaps all this problem is somehow related to setting (or config files) that are not removed with kernel and which are applied as soon as you install it again.

Eventhough all this is pure speculation that based on plain observations that I`ve made for the last couple of weeks I hope that will help solving the problem.