i have an Acer Aspire 5520g.
BT3 stop works on boot.
First of all, after gui presentation, my screen stays black and i must push shutdown button to go on with boot.
(but this is a little bug solved with new kernel version, bt3 use 18.104.22.168)
Then during the boot process i can see:
...and then there is no way to go on...Serial: 8250/16550 driver $revision: 1.90 $ 4 ports, irq sharing enabled
I tried BT3 in my Debian (under VirtualBox) and works great (in VESA mode) but is very slow in an emulated environment
(sorry for my english :P )