Created attachment 522055 [details]
upower -d output when almost full and discharging.
Description of problem:
1) For some time now when using Fedora 15, X61s battery has drained quickly. Regular idle use (with 5 firefox windows), the battery goes to zero in 1h15min - 1h30min. A while back with Fedora 14, this was 4+ hours. This may have been due to kernel or other component changes, but I haven't been able to isolate it.
Charging the battery also takes a very long time. Yesterday, after 3.5 hours of charging, it was still at 60% and the estimate for 100% completion was 13 hours. Right now at 31% the estimate to completion is somewhat better, just 1.7 hours.
2) gnome-power-manager and upower report incorrect battery lifetime estimates.
Gnome-power-manager, when full, reports battery lifetime usually as 2h30min. It decreases slowly to about 1h45min. Then it jumps down to 4% lifetime and starts to complain about critical lifetime. Battery stays at 4% or 0% for 15-30 minutes, even when /proc/acpi/battery/BAT0/state report "remaining capacity" as 0.
The jump down to 4% seems strange, as well as staying for half an hour in 0-4% state.
Version-Release number of selected component (if applicable):
Charge the battery to full. Take off the power cord and observe the time and behaviour to exhaust the battery. I need to kill gnome-power-manager and upowerd to make sure that the system runs out of power and doesn't hibernate/shutdown prematurely.
Attached are two outputs from upower -d.
Created attachment 522058 [details]
upower -d output when almost empty
(In reply to comment #0)
> Charging the battery also takes a very long time. Yesterday, after 3.5 hours of
> charging, it was still at 60% and the estimate for 100% completion was 13
> hours. Right now at 31% the estimate to completion is somewhat better, just 1.7
Sounds like you need a new battery. How old is the battery and how many cells does it have?
I'm not sure if a new battery would fix the issues. This is 3 years old now. The model is (according to upower) Sony 42T4571, which appears to have 8 cells. I do have the original 4-cell battery somewhere at another location (3yrs old, unused), but I suspect that would also exhibit weird behaviour.
Can you test with another battery please. 3 years for a battery is quite old. Thanks.
I've not been able test with the new battery yet, but I'll observe that after downgrading upower, the time calculation and battery lifetime is much more reliable now.
I suppose this change might be the culprit:
Description : - Fix how we estimate the device rate for batteries that do not
: provide this data.
I don't know how to verify if my battery does provide this data or not.
(In reply to comment #5)
> I've not been able test with the new battery yet, but I'll observe that after
> downgrading upower, the time calculation and battery lifetime is much more
> reliable now.
Cool. Can we close this bug? You'll likely find the power hog by using either gnome-power-statistics or powertop.