Acer Aspire 5100 problems in current

Hello,

With freebsd-current (also with stable) Acer Aspire 5100 laptop hangs on 
poweroff or reboot.
It seams is a conflict  between ehci and acpi module since compiling 
with ehci support disabled works fine.
Another issue is that  cpu fan never stops, even in passive cooling so 
this will reduce battery life.
On linux everything  works  fine even  suspend  and  hibernate.

    I am student on computer sciences  and i try  to set freebsd on my 
laptop for programming and testing.
Is there a solution for my problems?

P.S: Sorry if this is the wrong mailing-list to ask those questions!

Alin