Re: Sony laptop battery has odd behavior with 2.6.26-rc3ish build.



Hi!

A couple days ago, I updated my test build to commit
8033c6e9736c29cce5f0d0abbca9a44dffb20c39 and noticed an odd behavior
with the battery. If I unplug the power, the battery discharges and
that is reflected in /proc/acpi/battery/BAT0/state. I am not certain
the discharge is continuous and uniform or if it goes in steps. When I
plug the power back in, the level stays at a constant value (+-1mAh)
for a considerable period of time. It then does a single step back to
the fully charged value.

I have not done any searching to see when this began. I had been running
the ubuntu 2.6.22-14 kernel before this and the behavior was normal.

I am not certain what information you will need. Commit is above.

git bisect would certainly help...

$ cat /proc/acpi/battery/BAT0/alarm
alarm: unsupported
$ cat /proc/acpi/battery/BAT0/info
present: yes
design capacity: 4800 mAh
last full capacity: 4096 mAh
battery technology: non-rechargeable

Because something is clearly wrong here.

Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/



Relevant Pages

  • What I learned from Hurricane Charley
    ... Since we never lost power, I'm not sure about the level of our food and ... Since emergency shelter in the county in which I work (and to which I must ... In the late spring we had pulled out our battery operated drill and used it ... we could safely handle the panels without injury to our hands. ...
    (misc.survivalism)
  • Re: UPS waveform question for SUN servers
    ... O.K. The pure sine wave is better for systems with input ... The SB-1K and SB-2K use the same power supply. ... this UPS has caused more trouble than ... it has alleviated - with the battery sometimes discharging for no ...
    (comp.sys.sun.hardware)
  • Re: Redox batteries
    ... When you say that charging will use a fraction of the power of the generator because most of it is used by the propulsion, you are right when you consider riding at nominal speed. ... In this case, what I need is having the generator run for one hour at full power, then quietly ride using the batteries only for ten hours. ... You do not need to modify the charger itself - it bases lowering the current on voltage only, and "relaxing" will make sure that battery voltage will not go high enough to start throttling down the current. ... it does not matter how to charge it as long as you do not cause ...
    (sci.chem.electrochem.battery)
  • Re: 12v TV
    ... what was being pointed out is that the mains power supply outpts 12 volts... ... hence the TV's components are made using the lowest tollerance parts available, no need to use more expensive higher voltage parts when the TV will never see more than 12.3 volts. ... as a fair few people found out tho, plugging it into the caravans battery directly... ... i have a large solar array on my vans roof, and it does an equalizing charge every month, takes the batteries upto 16 volts for a few hours to balance them all out and stir up the cells, my Tv would have let the magic smoke out first time it did that for sure. ...
    (uk.rec.caravanning)
  • Re: 12v TV
    ... because it said 12v power supply on the box and I bought it ... parts when the TV will never see more than 12.3 volts. ... caravans battery directly... ... on charger) a lead acid battery dosent start to charge below ...
    (uk.rec.caravanning)