Cannot install Ubuntu 11.04 or 11.10 on Acer Aspire M3970

I cannot install Ubuntu 11.04 or 11.10 on my new machine, not in 32-bit or 64-bit, and not from CD or USB drive.

I tried to unplug all devices connected to USB, but nothing changes.

[ 15.383691] sd 7:0:0:3: [sdg] Attached SCSI removeable disk.

Then the installation or Live image booting does nothing more. Irritatingly, Ubuntu runs on every other machine that I own -- just not this new PC.

What can I do to get this running?

For comparison's sake, 10.04 LTS seems to work in every way. Why won't 11.04 or 11.10 work? Is there possibly a bug in the installer?

At boot time, try to press F6 and add one, two or these 3 commands: acpi=off noapic noalpic

That is:

acpi=off noapic noalpic

or

acpi=off noalpic

or

acpi=off noapic

or

noapic noalpic

or

acpi=off

or

noapic

or

noalpic