I can confirm this bug on Lucid beta 1 x64 with an HP Pavillon dv3510nr laptop using the VGA port. The noveau driver boots beautifully as long as an external is not connected. If it is, boot hangs at the screen that says "ubuntu" and shows five orange dots underneath. I can activate the external monitor after booting using the Monitor Settings tool.
I can confirm this bug on Lucid beta 1 x64 with an HP Pavillon dv3510nr laptop using the VGA port. The noveau driver boots beautifully as long as an external is not connected. If it is, boot hangs at the screen that says "ubuntu" and shows five orange dots underneath. I can activate the external monitor after booting using the Monitor Settings tool.
I also experienced the problem with the Live CD.