Beagleboard with Angstrom and LCD

I have a BeagleBoard C4. I am trying to run Angstrom. Connected an LCD with HDMI to DVI-D (normal HDMI can’t work?). But the screen stays black!
In the serial console i can see the Angstrom booting, it asks for login etc…

What can be wrong?

Can you post the head part of /boot/uboot/uEnv.txt file?
Normally, it should contain something like below, you can change the resolution (ex 1280x720) to fit your LCD screen.

defaultdisplay=dvi 
dvimode=1280x720MR-16@60

By the way, what version of Angstrom do you have? A minimal package or with GUI?