Black screen when booting Ubuntu

Hello, linaro-dev,

When I boot the Ubuntu desktop image available from

http://releases.linaro.org/12.06/ubuntu/leb-panda/lt-panda-x11-base_20120626...

all I see is a black screen and the mouse pointer.

I see some messages on the console like

[ 13.996887] (stk) : timed out waiting for ldisc to be un-installed [ 15.145019] (stk) :ldisc installation timeout

and

[ 22.983459] omap-hdmi-audio-dai omap-hdmi-audio-dai: audio not supported [ 22.990631] omap-hdmi-audio-dai omap-hdmi-audio-dai: can't open interface omap-hdmi-audio-dai: -19

My PandaBoard is connected to a Dell monitor with a native resolution of 1680 x 1050. Is this a problem?

-- Thank you, David