> On an XO-1 > The reading is "-4610.42" (!?) Its a 2's compliment number. Negative values are normal. But you need more than 1 reading. A single reading of the ACR doesn't tell you anything unless you reset it to a known value before you start.
> Reboot to Sugar and got "very little battery" > At no point the charge light came up (green, red, or orange/yellow) > > run 0 bg-acr! and then bat-recover. Indeed the battery looked drained (6.9 > Volts) and charged but took took just few mAh before it jumped to 7.4 volts. > Still no battery LED We are running debugging commands outside the EC. All reporting normal battery status reporting is invalid until you run a discharge and recharge cycle Also bat-recover is useless for this problem. > I may be way off, but judging from the erratic readings and LED behavior I > would think that might be an issue with the battery EC. Anyway to "talk" to > it and make it behave? Yes you are way off because you don't understand what you are doing. I'll be more specific in my instructions. > Though if interested I think would be much more efficient if you check the > battery in person ;) I'm mildly curious but what if you send it to me and then the problem does not duplicate? I'd rather sort it out in the known problem case. > If not, let me have clear what you want exactly since is not clear to me from > your latter mail if after the first run, AC is needed and the XO should start > with AC only or battery only of both together, or doesn't matter. Here's a specific procedure. We are going to zero the ACR register so that you don't have to keep track of the prior reading. - Start with the XO in a clean working condition. ie remove all power and battery. - Boot the XO. Sugar or OFW either will work. - Run on battery and allow the battery to discharge until is says its < 90% - Connect power and let the battery charge to full. - Reboot XO and stop at OFW. - ok batman-start - ok 0 bg-acr! - Verify the ACR is really zero. - ok bg-acr@ .bg-acr (Should print zero) - Remove battery (Wait 24 hours, you can do whatever you want with the XO) - Boot XO and stop at OFW - ok batman-start - ok bg-acr@ .bg-acr That number will be the amount of capacity lost. -- Richard A. Smith One Laptop per Child _______________________________________________ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
