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[hagbard <619008@xxxxxxxxxxxxxxxxxx>]

I was experiencing this same problem and found a way to fix it.

I just received a new Lenovo T410 laptop with discrete NVidia graphics
accelerator today.  Installed Ubuntu 10.10 and everything worked fine.
When I installed the NVidia driver and rebooted, the system would hang
on "checking battery state" message and not progress any further.

The cause and solution:  I checked the bios of the T410 and there is a
graphics setting that switches between "integrated" (no acceleration)
"discrete" (activates NVidia accelerator at all times) and "NVidia
Optimus".  The "Optimus" setting was on by default, with this
description:

"If enabled, System BIOS automatically switches Graphics Device setting
to NVIDIA Optimus mode if the OS supports the feature, and to Discrete
Graphics if the OS does not support it."

I changed the setting to "discrete" and Ubuntu booted with no problems.
I assume that Linux does not currently support NVIDIA Optimus :)

-- 
Ubuntu 10.10 freezes when loading
https://bugs.launchpad.net/bugs/619008
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