I've been experiencing this bug as well on my HP Pavilion dv6000 ever
since Karmic. I think the problem is related to the 'rate' that is
reported through lshal and devicekit. The former reports the rate as
-1:
$ lshal | grep battery | grep rate
battery.charge_level.rate = 0 (0x0) (int)
battery.reporting.rate = -1 (0xffffffff) (int)
Devicekit reports the rate as way too little:
$ devkit-power --dump | grep energy
energy: 47.8336 Wh
energy-empty: 0 Wh
energy-full: 69.1456 Wh
energy-full-design: 88.8 Wh
energy-rate: 0.0148 W
When I divide the full value by the rate, I get 4672 hours, which is
much more than I can get out of my battery. Just playing with numbers,
it looks like the rate may be off by a factor of 1500. If it were 22.2
watts, then the energy-full/energy-rate would be about 3.1, which is
much closer to what I can actually get from this battery.
Of course, this is assuming that GPM even uses the devicekit numbers at
all. If I get motivated later, maybe I'll look through the GPM source
to see if I can find where and how the time remaining is calculated.
--
Regression: devicekit-power does not display remaining battery time
https://bugs.launchpad.net/bugs/439783
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