Hi TyTung, have great thanks for your update !
I've no more low soud experience with bluetooth, that's cool ! I need it every time I take my car.
However, I have got a black screen with an incoming call, when my phone was pluged into my pc (without sd mounted), I had to press a button to wakeup the screen.
I didn't set up any "perfomance options", I have 245-998Mhz smartassV2, CFQ, no KSM, no Zram. I used them before (on v2.2) but my phone works better without...
I experiment also some reboots only when I have a bad network coverage (2 bars or less) and freezes only in my car, when I use the gps (Icoyote) with the sd mounted on usb (mass storage).
And I've noticed a curious comportment when I activate the mass storage with Icoyote or Maps (naviagtion) running, both apps seem restart ! Maps re-calculates the route and Icoyote restarts.
I've no remember of this when I used the sys@NAND install.
Thanks for trying to answer me.