Re: Battery - small irritation
On Sat, Nov 26, 2011 at 7:03 PM, Richard Smith rich...@laptop.org wrote: On Sat, Nov 26, 2011 at 11:24 AM, Kevin Gordon kgordon...@gmail.com wrote: Hi: I have received a new XO 1.5, shipped with a battery S/N starting with 008. Over the past few days, I've noticed something a tad strange. No matter how long it's plugged in, the little charging LED stays yellow. However, the frame battery indicator says 100% The full stop condition for battery charged is when the constant voltage taper current drops below .12. I suspect you have some sort of cell defect that keeping the taper current above that. Next time you are using the machine stop powerd and run olpc-pwr-log in a terminal (you can use it normally) and let it run down until it powers off. Then remove the battery, power back up, run olpc-pwr-log again and then re-insert the battery. Let it charge until you see the got to 100 and the 3rd and 4th column of numbers reach some sort of steady state where they don't change much. Ctrl-C and then send me the file. FYI. Col 3 is voltage in uV and col 4 is amperage in uA. Darn, I did something else first. Yesterday, before I left for the day, I figured what the heck, let me try and load batman.fth and run the bat-recover command. That started off cranking about 30-35 uA, and the uAh was increasing by about 1uAh per minute. But when I left after about 90 minutes, the uA was seemingly decreasing and was averaging about 17-20 uA, and the uAh was now only increasing by about 1uAh every 3 minutes. When I returned this morning, it was running at about 1.2 uA, and the uAh had stagnated at 98.75. (The routine was running in total for about 14 hours) The indicator was still yellow. I removed the battery ( to get the keyboard back ) when I reinserted the battery and the led turned GREEN. I then went to my email, and alas then saw your procedure. Sorry. So, I have put a little tape indicator on the battery, and if it misbehaves again, I will instead run what you sent me. (Unless you think it still instructive to perform that test, but I fear my dabbling may have trumped the evidence.) Thanks for your quick reply, sorry I didn't get to it first to provide a better analysis. Cheers KG Thanks. -- Richard A. Smith One Laptop per Child ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Battery - small irritation
On 11/27/2011 07:16 AM, Kevin Gordon wrote: GREEN. I then went to my email, and alas then saw your procedure. Sorry. So, I have put a little tape indicator on the battery, and if it misbehaves again, I will instead run what you sent me. (Unless you think it still instructive to perform that test, but I fear my dabbling may have trumped the evidence.) Thanks for your quick reply, sorry I didn't get to it first to provide a better analysis. No worries. That suggests that your cells were out of balance. How long was the longest you ever let it sit before running bat-recover? In theory just sitting there (yellow LED) waiting for the taper current should be able to balance as well. If you are experiencing balance issues I wonder if you have any reduced capacity to go along with that. You can check that with olpc-pwr-log. The procedure would be to stop powerd; insert the battery on ext power and make sure its full; run olpc-pwr-log and then remove external power right when you see the first line of output. Then you just want to let the laptop sit there idle until it shuts off. Unless you have an old build olpc-pwr-log tracks the net ACR in the 8th column. Its in uAh. The range I use for good is 280-320 uAh. If your olpc-pwr-log is old enough that it doesn't have a net ACR column then you can compute the value by subtracting the Full ACR value in 6th column on the 1st line by the value in the last line in the log file. -- Richard A. Smith rich...@laptop.org One Laptop per Child ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
laptop.org #09371 OLPC Contributors Program Mtg (on #olpc-meeting, Fri Sep 28, 11:15AM EDT)
Dear Mr. Leonard, Mr. Holt, Mr. Battley, Catalyst for Hope Project - Sri Lanka - UPDATE Answers to questions brought up via e-mail and Sep 28 LiveChat: 1) *Sinhala translation of Sugar UI*: We have found a great volunteer, Pahan Charithanga in Sri Lanka to help with that. This is what he said regarding the e-mail from Mr. Leonard. I contributed OLPC during my internship period and I am ready to contribute again. We conducted some teachers workshops and provided technical assistance for them. I can talk to people who worked with me and get their involvement as well. For the translation of the UI we can get sinhala blogging community, and university student's contributions. All we have to do is make aware about the project. Pahan's contact: *pahan...@gmail.com* 2. Dr. Jayantha has talked in depth with the local school staff: here are her comments - -- We can get the maximum support from the school staff. One or two dedicated teachers are possible to get trained. -- Internet access is also possible. -- Graders 8 and 9 (12-14 years old) are better suited for the project - for now. 3. Electricity is available at school. We are eager to move forward with this. Please let us know what the next step is to get OLPC laptops to Sri Lanka. Thanks Yohan On Sun, Oct 30, 2011 at 5:44 PM, Chris Leonard cjlhomeaddr...@gmail.comwrote: If you or your friends could help complete the translation of the Sugar UI that runs on the XO laptop into: Tamil: http://translate.sugarlabs.org/ta/ or Sinhala: http://translate.sugarlabs.org/si/ It would be a very nice way of giving back in a manner that would help both your kids and others in Sri Lanka. cjl Sugar Labs Translation Team Coordinator ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Raspberry Pi as development platform for XO-1.75
On Sat, Nov 26, 2011 at 3:55 PM, Sridhar Dhanapalan srid...@laptop.org.au wrote: How useful could a Raspberry Pi be as a development platform for the XO-1.75? It looks like the Pi is ARM11 based (v6 arch) and the XO has a v7 arch. The current 11.3.0 release is based on Fedora 14 armv5tel which runs already on the Raspberry Pi and it'll happily run sugar. The 12.1.0 and later releases will run the Fedora 17 hardfp based release which isn't binary compatible. Its as compatible as any other device that is capable of running Fedora (arm or x86 based) so not completely useless but at the same time not the best. The specs in terms of speed and memory are actually not that different to the specs (processor architecture aside) in the original XO-1 as the more expensive board has the same amount of RAM. Peter ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Android on XO-1.75
On Nov 24, 2011, at 8:22 PM, Rafael Ortiz wrote: Thanks Noise your reply is very appreciated, Although I was expecting news from the OLPC team about it. There are products based on the Armada 610 running Android 2.2 on the market.There is no intent by Marvell to support Android 3 on the Armada 610. We would all like to see Android 4 running on the XO-1.75/XO-3. At this time, however, OLPC just doesn't have any resources to dedicate to the task. We have been concentrating on Fedora Linux support. Cheers, wad On 2011.11.23. 21:57, Rafael Ortiz wrote: Hi Devs I'm just wondering what's the actual state of Android on the XO-1.75?. Are there any docs or info about how to install it ?. Are there any plans for it on the near future?. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
