New KDE installation freezes on start

[Alexander Motin]

Hi.

I've just installed 10-CURRENT on my new laptop where from fresh ports 
with enabled WITH_NEW_XORG and WITH_KMS and all default options 
installed xor, kde4 and few other ports. On attempt to start KDE after 
all start icons appeared "kdeinit4: plasma-desktop" process starts to 
eat CPU and memory and nothing goes on. Happens with both intel and vesa 
drivers. Tried both startx and kdm.

What can it be? How can I debug this? Can it be some missing 
configuration or packages?

PS: another existing 10-CURREBT laptop with system and ports updated 
about the same time but with old Xorg seems work fine.

-- 
Alexander Motin