--- On Sun, 6/3/12, Richard A. Smith <rich...@laptop.org> wrote: > From: Richard A. Smith <rich...@laptop.org> > Subject: Re: XO battery/performance [Devel Digest, Vol 76, Issue 4] > To: "Yioryos Asprobounitis" <mavrot...@yahoo.com> > Cc: devel@lists.laptop.org > Date: Sunday, June 3, 2012, 8:41 AM > On 06/03/2012 04:43 AM, Yioryos > Asprobounitis wrote: > > >> serial connector loaded. Its > >> the connector under the heat spreader. > > > > There goes my new XO-1.75... > > Think of it a a rite of passage. > > > Just to be sure, is the UART 4, CN23, shown in the > attached picture in blue. Correct? > > Correct. > > > If OK, please advise further actions. > > First upgrade the firmware to the latest version and let it > update the EC code. > > Then just plug up the serial connector and then do a full > power cycle of the unit by removing both external power and > the battery and then plugging in the problem battery. > Send the output. May or may not be anything of > interest in that log. > > Then see if the problem duplicates on the 1.75. You > can get a quick reading from the EC of the battery level by > using the command 'b3'. Type b3 <enter> which turns on > some simple debug info. You can't leave that on > however because it will prevent the EC from going into stop > mode. 'b0' will turn it back off. > > You have to be really quick with the serial commands when > the XO is off. When off and running on battery the EC > will go into stop mode and it does that really fast. > When its in stop mode you can't talk to it on the serial > port. I usually have one hand ready to type b3 > and then wake the EC up by a very short power button > press. Then before it goes back into stop mode type > b3<enter>. Once a second it will output a short > battery stat then type b0 to stop it and allow it to go back > into stop mode. > > So hook up the EC serial port and log the output. Then > charge up the battery. b3 to get some readings. Disconnect > external power and then b0 . You should see it go into > stop mode. In 24 hours wake the EC up do b3 > to get a 2nd set of readings and then send the log output. >
Took some time and a lot of juggling and ended up to a lot of questionmarks in black diamonds so I do not really know if I did it right or wrong, but here is the screen log just the same. A power cycle followed bu the b3-b0, followed by a power cycle. Both the client with the broblem battery and the host were XO-1.75 running os13. Also I had a hard time detaching from the screen. Maybe the wiki page needs some clarification. What "C-a" means? "Capital C, dash, a" 3 consecutive characters? "ctrl+a"? "shift-c-a" keys together? other? Thx > -- Richard A. Smith <rich...@laptop.org> > One Laptop per Child >
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