Re: power consumption after shutdown

2009-02-16 Thread James Cameron
On Mon, Feb 16, 2009 at 12:19:41AM -0500, Richard A. Smith wrote: qu...@laptop.org wrote: (If one discharges an XO battery outside the XO using a home lighting circuit, the displayed state of charge will be inconsistent. Persisting in this practice results in increasing inconsistency.

Re: power consumption after shutdown

2009-02-16 Thread Frederick Grose
In a discussion thread like this, it would good to have a source code link for all to reference, now and in the future. Thanks for all the contributions! On Mon, Feb 16, 2009 at 3:36 AM, James Cameron qu...@laptop.org wrote: On Mon, Feb 16, 2009 at 12:19:41AM -0500, Richard A. Smith wrote:

Re: power consumption after shutdown

2009-02-16 Thread pgf
frederick wrote: In a discussion thread like this, it would good to have a source code link for all to reference, now and in the future. Thanks for all the contributions! unfortunately, the code in question (i.e., the EC firmware) is one of the few small bodies of code on the XO which isn't

Re: power consumption after shutdown

2009-02-16 Thread Richard A. Smith
Richard A. Smith wrote: The instrumented setup only has a current measurement resolution down to about 1mA. So there's room for a lot of error in that measurement. Looking at the schematics I see that there are quite a few other parts that share the 3.3V rail with the EC so 1mA or so

Re: power consumption after shutdown

2009-02-16 Thread S Page
I made http://wiki.laptop.org/go/XO_Troubleshooting_Battery#Tips but you folks can do a much better edit. In q2e32 I've pulled in some of my batman.fth stuff. I noted this in the same page's batman.fth section. -- =S ___ Devel mailing list

Re: power consumption after shutdown

2009-02-16 Thread Richard A. Smith
S Page wrote: I made http://wiki.laptop.org/go/XO_Troubleshooting_Battery#Tips but you folks can do a much better edit. In q2e32 I've pulled in some of my batman.fth stuff. I noted this in the same page's batman.fth section. I don't see it. In q2e32 i've changed the names of some of the

Re: power consumption after shutdown

2009-02-15 Thread Gary C Martin
On 15 Feb 2009, at 05:36, Mikus Grinbergs wrote: My apologies for not being clear. I'll try again: I want to feel that the battery that I just put into the XO I'm walking out the door with is as charged up as it normally can be. 1) If that battery came from an XO that was plugged into the

Re: power consumption after shutdown

2009-02-15 Thread Martin Langhoff
On Sun, Feb 15, 2009 at 6:36 PM, Mikus Grinbergs mi...@bga.com wrote: I was under the impression that when the battery charge went somewhere below about 97%, the XO would charge it some more. So I was surprised to have it stay at 94%. [If 94% being shown on the pop-up is not low enough for

Re: power consumption after shutdown

2009-02-15 Thread quozl
On Sun, Feb 15, 2009 at 12:36:36AM -0500, Mikus Grinbergs wrote: My apologies for not being clear. I'll try again: I want to feel that the battery that I just put into the XO I'm walking out the door with is as charged up as it normally can be. 1) If that battery came from an XO that

Re: power consumption after shutdown

2009-02-15 Thread Richard A. Smith
qu...@laptop.org wrote: 3) If that battery had been sitting on the shelf (not in an XO) for a month -- what did I need to do to make it topped off ? Discharge it to 90% capacity, then charge it. q2e32 can help you out. In q2e32 I've pulled in some of my batman.fth stuff. As James

Re: power consumption after shutdown

2009-02-15 Thread Richard A. Smith
qu...@laptop.org wrote: (If one discharges an XO battery outside the XO using a home lighting circuit, the displayed state of charge will be inconsistent. Persisting in this practice results in increasing inconsistency. Ceasing the practice results in decreasing inconsistency over several

Re: power consumption after shutdown

2009-02-14 Thread Mikus Grinbergs
Chris Ball and Paul Fox responded: I take this to mean that *something* was draining some power for the two days the XO was sitting in its shut down state. The embedded controller was. Something needs to be watching for a power button press in order to know when to turn on. Thank you. I

Re: power consumption after shutdown

2009-02-14 Thread Edward Cherlin
On Fri, Feb 13, 2009 at 8:38 PM, Chris Ball c...@laptop.org wrote: Hi, by default the wireless card remains alive to participate in a potential mesh network, disabling wireless should give you a lot more time. You're thinking of sleep mode, not the full shutdown that Mikus is

Re: power consumption after shutdown

2009-02-14 Thread pgf
edward wrote: On Fri, Feb 13, 2009 at 8:38 PM, Chris Ball c...@laptop.org wrote: Hi, by default the wireless card remains alive to participate in a potential mesh network, disabling wireless should give you a lot more time. You're thinking of sleep mode, not the

Re: power consumption after shutdown

2009-02-14 Thread Richard A. Smith
da...@lang.hm wrote: The embedded controller was. Something needs to be watching for a power button press in order to know when to turn on. by default the wireless card remains alive to participate in a potential mesh network, disabling wireless should give you a lot more time. In power

Re: power consumption after shutdown

2009-02-14 Thread Richard A. Smith
Richard A. Smith wrote: going into STOP mode the EC is only going into IDEL mode. In IDEL the instruction fetch is turned off but the clocks and timers still run. 4mA is listed as the nominal draw in that mode. /s/IDEL/IDLE -- Richard Smith rich...@laptop.org One Laptop Per Child

Re: power consumption after shutdown

2009-02-14 Thread imm
On 14 Feb 2009, at 19:24, Richard A. Smith wrote: While running on eternal power the EC does not attempt to enter a low power mode. s/eternal/external/ ? Although, to be honest, I'd love to believe you were right... ___ Devel mailing list

Re: power consumption after shutdown

2009-02-14 Thread Richard A. Smith
Richard A. Smith wrote: into STOP mode but its power draw suggests otherwise. I'll have to study it deeper. After deeper study I have verified that the EC is going into stop mode. I have also found the (biggest) source of the additional power draw I measured. The tinder box XO has the

Re: power consumption after shutdown

2009-02-14 Thread quozl
On Sat, Feb 14, 2009 at 01:56:22PM -0500, Mikus Grinbergs wrote: I have found the XO-1 batteries (mfg by BYD Company Ltd) to be very stingy with energy loss. When I put one back in after a month out of the case, the XO software told me it was still 94% charged. The displayed state of charge

Re: power consumption after shutdown

2009-02-14 Thread Mikus Grinbergs
This gets more and more bizarre !! James wrote: The displayed state of charge is stored in the chip in the battery, and is maintained by the EC. The battery does not change it's own state of charge value. and (If one discharges an XO battery outside the XO using a home lighting

Re: power consumption after shutdown

2009-02-14 Thread quozl
On Sat, Feb 14, 2009 at 08:26:13PM -0500, Mikus Grinbergs wrote: This gets more and more bizarre !! No, it's just physics and chemistry, constrained by engineering. Please, if you think it is bizarre, explain why you think so, and I'll happily explain the physics that I know. What I am now

Re: power consumption after shutdown

2009-02-14 Thread Mikus Grinbergs
My apologies for not being clear. I'll try again: I want to feel that the battery that I just put into the XO I'm walking out the door with is as charged up as it normally can be. 1) If that battery came from an XO that was plugged into the AC 24/7 for the past week -- I *think* it is

power consumption after shutdown

2009-02-13 Thread Mikus Grinbergs
As far as I can tell, the battery in the XO-1 retains its charge quite well when taken out of the case. But in my experience, when I specify 'Shutdown' to the software, and close the XO lid after all its lights (including 'power') are extinguished -- then when two days later I insert the AC

Re: power consumption after shutdown

2009-02-13 Thread Benjamin M. Schwartz
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Mikus Grinbergs wrote: I take this to mean that *something* was draining some power for the two days the XO was sitting in its shut down state. All rechargeable batteries lose stored energy over time. The phenomenon is called self-discharge. It

Re: power consumption after shutdown

2009-02-13 Thread Chris Ball
Hi, I take this to mean that *something* was draining some power for the two days the XO was sitting in its shut down state. The embedded controller was. Something needs to be watching for a power button press in order to know when to turn on. - Chris. -- Chris Ball c...@laptop.org

Re: power consumption after shutdown

2009-02-13 Thread pgf
benjamin m. schwartz wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Mikus Grinbergs wrote: I take this to mean that *something* was draining some power for the two days the XO was sitting in its shut down state. All rechargeable batteries lose stored energy over time.

Re: power consumption after shutdown

2009-02-13 Thread david
On Fri, 13 Feb 2009, Chris Ball wrote: Hi, I take this to mean that *something* was draining some power for the two days the XO was sitting in its shut down state. The embedded controller was. Something needs to be watching for a power button press in order to know when to turn on.

Re: power consumption after shutdown

2009-02-13 Thread quozl
Long ago I did some early measurements of the EC and it was consuming current while operating. The operating current has varied slightly according to the firmware version. There have been improvements, but I've not measured it recently. The symptom you describe is quite normal ... the battery