[Bug 77104] Battery Monitor -- time remaining estimates incorrect to start with

merc merc at mobily.com
Mon Dec 25 09:06:53 GMT 2006

Public bug reported:

Binary package hint: gnome-applets


There is a bit of a problem with the battery applet. I am using Feisty
with all the updates, and a Lenovo V100 laptop.

The problem is especially there at the beginning. After a while, things get better. However, it takes a little too long.
This is a table of what the monitor tells me. At this point, the machine had been running for about 15 minutes (and the "battery left" was just silly to start with, but that's OK).

Here we go:

Time - Battery left
5:20PM - 1.54
5:21PM - 1.48
5:25PM - 1.35
5:30PM - 1.28
5:40PM - 1.15
5:45PM - 1.09
5:50PM - 1.04
5:55PM - 1.00
6.00PM - 0.56
6.05PM - 0.50

As you can see, it only starts telling the truth after about 35 minutes
(that's 15 minutes before I started logging, plus 20 minutes after
starting logging).

The computer was used the same way throughout these measurements: light
internet browsing, etc. The fan turned itself on every now and again
throughout the testing. PLEASE NOTE that I am in Australia, it's summer
and it's bloody hot here.

This is the output of cat /proc/acpi/battery/BAT0/*

alarm:                   unsupported
present:                 yes
design capacity:         28080 mWh
last full capacity:      28760 mWh
battery technology:      rechargeable
design voltage:          10800 mV
design capacity warning: 1435 mWh
design capacity low:     861 mWh
capacity granularity 1:  574 mWh
capacity granularity 2:  27325 mWh
model number:            LNV-92P1216
serial number:            2744
battery type:            LION
OEM info:                06
present:                 yes
capacity state:          ok
charging state:          discharging
present rate:            16286 mW
remaining capacity:      14980 mWh
present voltage:         11186 mV

(Taken at 6:00PM)

The output of lshal is attached.
I know I might be knit picking, but really, 40 minutes to have a realistic estimate really is a little bit much.

I hope this helps. I am here if you need me to test it more - I am more
than willing to keep track of what the estimates are every 10 minutes.



** Affects: gnome-applets (Ubuntu)
     Importance: Undecided
         Status: Unconfirmed

Battery Monitor -- time remaining  estimates incorrect to start with

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