I am running since a couple of days
Kernel 3.6.6-030606-generic #201211050512 SMP Mon Nov 5 10:12:53 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
from UpUbuntu.
It seems to me that up to now "acpitool -a -b" has always reported correctly the state of the AC adapter.
I am running since a couple of days
Kernel 3.6.6-030606- generic #201211050512 SMP Mon Nov 5 10:12:53 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
from UpUbuntu.
It seems to me that up to now "acpitool -a -b" has always reported correctly the state of the AC adapter.