I experience a similar problem on a Sony VAIO Z12, using Ubuntu Desktop
11.04 beta. After selecting the first option in the Live CD menu ("try
ubuntu", or such), I quickly get a black screen. Minutes later, a
beautiful GNOME desktop appears. I experience the same black screen
during shutdown. I would have thought the system had hung if it wasn't
for optical drive activity. ;)
The Z12 has two graphics cards, one nvidia and one intel, and I can
control which one is activated via BIOS. I only noticed this issue when
intel is being used. With nvidia, I could see stuff on the screen
during boot. So maybe this is a conflict between vga= and intel cards.
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https://bugs.launchpad.net/bugs/745947
Title:
Fails to display video after grub (kernel lacks video output)
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