desktop-packages team mailing list archive

[Richard Hughes <richard@xxxxxxxxxxx>]

I'm pretty sure some of you will be fixed by this upstream commit:

commit b971b43c45bef9251e1d6389716b9fbe107802c7
Author: Leonardo Robol <leo@xxxxxxxx>
Date:   Wed Oct 19 17:13:12 2011 +0100

    Use linear regression to get better predicted battery times
    
    For hardware that has no rate data we use the differences in charge over a time
    period to work out the effective rate. Using linear regression this estimation
    is much more realistic.
    
    To do this, introduce a simple circular buffer and use an index to calculate
    the rate on each update.
    
    Signed-off-by: Richard Hughes <richard@xxxxxxxxxxx>

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https://bugs.launchpad.net/bugs/120258

Title:
  Laptop Battery Time Remaining Outrageously  Inaccurate

Status in Gnome Powermanager:
  New
Status in “gnome-power-manager” package in Ubuntu:
  Confirmed

Bug description:
  Ubuntu 7.04 Feisty Fawn

  Hardware is HP Pavilion DV1000 series (specific DV1588EA)

  Battery monitor when running on battery reports percentage of battery
  remaining correctly, but the corresponding remaining time is often
  fabulously wrong (and can swing between e.g a few minutes to tens of
  hours in the blink of an eye). /* What I wouldn't give for batteries
  that can last 14 hours between charges... */

  It looks for all the world like the underlying values are being held
  in storage classes which are too small or where value-wrapping is not
  being handled quite right...

  BTW UBUNTU is fantastic; I'm a convert! Keep up the good work!

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