Comment 28 for bug 23048

I have an acer laptop as well (4101WLMi)
And power management/battery levels does not work either.
I have to boot with nolapic
I believe the battery problem comes from acer using 'smart batteries'

I was successful in fixing and recompling the dsdt and creating a new initrd,
after that I was able to view my battery status.
Just thought I would drop a note in case it can help anyone, or help fix the
problem.