[Bug 14050] some acpi laptops erroneously report 'discharging' while on AC power

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Ubuntu (laptop) | hal





------- Additional Comments From abovett at arda.demon.co.uk  2005-11-07 16:04 UTC -------
I think I'm seeing this bug as well. (There seem to be a lot of similar ones on Bugzilla right now - duplicates?). My battery indicator randomly 
switches between chargeing and battery on occasion, and the battery capacity suddenly drops to 0 and then back up.  I'm running Breezy on a 
TwinHead E12B notebook - it was fine under Hoary. Doing this:

$ while true; do grep "remaining capacity" /proc/acpi/battery/BAT0/state; done

gives something like this whilst discharging:

remaining capacity:      1524 mWh
remaining capacity:      1524 mWh
remaining capacity:      192 mWh
remaining capacity:      1524 mWh
remaining capacity:      1524 mWh
remaining capacity:      1524 mWh
remaining capacity:      1524 mWh
remaining capacity:      1524 mWh
remaining capacity:      1524 mWh
remaining capacity:      1524 mWh
remaining capacity:      192 mWh
remaining capacity:      1523 mWh
remaining capacity:      1523 mWh

And this whilst charging:

remaining capacity:      1538 mWh
remaining capacity:      1538 mWh
remaining capacity:      128 mWh
remaining capacity:      1538 mWh
remaining capacity:      1538 mWh
remaining capacity:      1538 mWh
remaining capacity:      1538 mWh
remaining capacity:      1664 mWh
remaining capacity:      1539 mWh
remaining capacity:      1539 mWh
remaining capacity:      1539 mWh
remaining capacity:      1539 mWh
remaining capacity:      1539 mWh
remaining capacity:      1539 mWh
remaining capacity:      128 mWh
remaining capacity:      1539 mWh
remaining capacity:      1539 mWh
remaining capacity:      1539 mWh
remaining capacity:      1539 mWh
remaining capacity:      1540 mWh

Note spurious values of 128 and 192 respectively - these are repeatable.

I'm willing to help test any fixes with this.

Andy B

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