James Cameron | 1 Apr 08:54 2010

Re: XO-1.5 network disconnection button testing

Thanks to the testers, this change has been merged and included in Sugar
0.84.15 and can be found in os117 (which is not yet announced).  I've
tested it again, and it works.  I'd like to know if people with secured
access points also find it to work.

--

-- 
James Cameron
http://quozl.linux.org.au/
Chris Ball | 1 Apr 20:10 2010

New XO-1.5 10.2.0 build 117

http://wiki.laptop.org/go/F11_for_1.5
http://build.laptop.org/10.2.0/os117

Compressed image size: 678.40mb (+0.03mb since build 116)

Description of changes in this build:
 * sugar: fix "discard network history" and AP disconnection (#9788)
 * sugar: fix AP association failure after removing encryption (#9977)
 * rfkill: more fixes (#9899, still needs newer olpc-utils)
 * kernel: add USB webcam drivers
 * Pull F11 updates.
 * powerd: inhibit suspend when camera or audio are active, and at a lower
           CPU busyness threshold; change trace file format; suppress wake
           on wlan when screen is blanked, by default.

Package changes since build 116:

-GConf2-2.26.2-1.fc11.1.i586
+GConf2-2.26.2-1.fc11.2.i586
-GConf2-gtk-2.26.2-1.fc11.1.i586
+GConf2-gtk-2.26.2-1.fc11.2.i586
+SDL-1.2.13-9.1.fc11.i586
-SDL-1.2.13-9.fc11.i586
-acl-2.2.49-2.fc11.i586
+acl-2.2.49-3.fc11.i586
-bind-libs-9.6.2-2.P1.fc11.i586
+bind-libs-9.6.2-3.P1.fc11.i586
-bind-utils-9.6.2-2.P1.fc11.i586
+bind-utils-9.6.2-3.P1.fc11.i586
-curl-7.19.7-5.fc11.i586
(Continue reading)

James Cameron | 2 Apr 00:04 2010

Re: New XO-1.5 10.2.0 build 117

On Thu, Apr 01, 2010 at 02:10:04PM -0400, Chris Ball wrote:
> http://build.laptop.org/10.2.0/os117
>  * sugar: fix AP association failure after removing encryption (#9977)

Oops, sorry, the fix included in the build only makes the workaround
work properly.  I don't believe it reprompts if the passphrase on an AP
is changed.

--

-- 
James Cameron
http://quozl.linux.org.au/
Holt | 2 Apr 08:13 2010

OLPC Talk: Hand Crank Tiring? It's a Solar Project! (Sunday April 4th, 4PM in Boston)

Expert Discussion:

    Powering OLPC's XO Laptops using Solar Electricity

Please come in person this (Easter) Sunday April 4th, 4PM Boston Time,
to Kendall Square in Cambridge, Massachusetts, armed with your most
thoughtful questions on Solar practicalities -- as they relate to OLPC
deployment around our fragile planet's rural/developing expanses.

A warm welcome to our guest speakers:

  * Richard Smith, OLPC lead power engineer
     http://wiki.laptop.org/go/Battery_and_power
  * Robert Pilawa, MIT solar researcher
     http://www.linkedin.com/pub/robert-pilawa/2/40/470
  * Kim Quirk, NH solar engineer and vendor (attendance tentative)
     http://EnergyEmp.com

RICHARD SMITH: I'm going to give a summary of whats going on past and
present with the XO-1 and XO-1.5 with respect to solar, and then mention
what the current options are for the simple case of a XO and a [solar] 
panel.

I'll talk about the 10 Watt panel and the voltage limiter option, and 
briefly
mention a project in the works with RCAL [Arkansas/California Company]
for a single charger that can be powered from solar panel or a 12V supply.

ROBERT PILAWA: What I would like to talk about is a low-cost solar charger
that we are designing for the developing world. It is compatible with the
(Continue reading)

Holt | 4 Apr 23:17 2010

slides from solar talk (ongoing now)

Low-Cost Solar Charge Controller with the Maximum Power Point Tracking 
for the Developing World

by Robert Pilawa, MIT Solar Researcher & PhD Student
http://www.slideshare.net/metasj/olpc-apr-4-2010
Kim Quirk | 5 Apr 01:58 2010
Picon

Re: slides from solar talk (ongoing now)

Sorry I missed today's discussion -- Easter celebrations went on quite a bit longer than I expected. 


The charge controller looks like a great project. I know there would be a number of markets for that even outside of the OLPC projects. I'm always looking for inexpensive charge controllers since the way we charge batteries has a lot to do with how long they will last and how many cycles they can undergo. An affordable MPPT controller is a great idea!

The refrigeration project I am working on requires a solar panel, charge controller and battery. Pretty simple design... and I would like to specify and MPPT controller, but I'm not sure they can afford it. PWM (pulse width modulation) is better than no controller.

Thanks for inviting me, Adam. Don't hesitate to send questions on renewable energy projects -- not sure if I can help, but I'd give it a try.

Regards,
Kim Quirk



On Sun, Apr 4, 2010 at 5:17 PM, Holt <holt <at> laptop.org> wrote:
Low-Cost Solar Charge Controller with the Maximum Power Point Tracking for the Developing World

by Robert Pilawa, MIT Solar Researcher & PhD Student
http://www.slideshare.net/metasj/olpc-apr-4-2010



--
Energy Emporium
60 Main St, PO Box 351
Enfield, NH 03748
603.632.1263
http://www.energyemp.com
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mabente | 5 Apr 22:34 2010

Re: [OLPC/Paraguay] Debugging NetworkManager-0.7.2.995 + Power Management

Very sorry for the late response, here is the messages log and gdb
backtrace log!

Hopefully it will be helpful :)

Attachment (gdb.txt): text/x-c, 4660 bytes
Attachment (log): text/x-pascal, 36 KiB
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Richard A. Smith | 5 Apr 23:37 2010

firmware Q3a35e

I have an 1.5 pre-release firmware I'd like some wider testing on. 
Please install this on your 1.5 and run some charge/discharge cycles on 
your battery.

http://dev.laptop.org/~rsmith/q3a35e.rom

There's a few minor changes in OFW from this and q3a35 mostly the 
addition of some commands that let you enable and disable EC MPPT and 
observe whats going on.

The real changes are in the EC code.  The introduction of MPPT [1] into 
the firmware required deep structural changes to the battery & 1-wire code.

While I was ripping everything apart I also implemented some of the more 
invasive changes I had planned.

If I got everything right you should see zero difference between battery 
operation on a35 and a35e except that some bugs are fixed.

I've been running this code on all of my test machines for the past 2 
weeks churning through lots of charge/discharge cycles with no problems, 
but I won't be surprised if there's still a few regressions waiting to 
surface.

Although this firmware has the ability to do MPPT when connected to a 
solar panel its disabled by default.  The reasons for that are:

1) I'm the only person who as a XO properly modified for MPPT to work.
2) Its not quite ready yet.  It backs off the power sometimes when it 
should not.

The point of this pre-release is to get some wider testing of the new 
battery code and not MPPT.  I'll announce when the MPPT stuff is ready.

[1] http://en.wikipedia.org/wiki/Mppt

Thanks.

--

-- 
Richard A. Smith  <richard <at> laptop.org>
One Laptop per Child
John Watlington | 6 Apr 08:00 2010

USB keyboard replacement


I have been installing USB keyboards in a few XO-1.5s, and took
a recent opportunity to document the process:

http://wiki.laptop.org/go/XO_1.5_USB_Keyboard

Cheers,
wad
Dan Williams | 6 Apr 09:28 2010
Picon

Re: [OLPC/Paraguay] Debugging NetworkManager-0.7.2.995 + Power Management

On Mon, 2010-04-05 at 17:34 -0300, mabente wrote:
> Very sorry for the late response, here is the messages log and gdb
> backtrace log!
> 
> Hopefully it will be helpful :)

Yes, quite.  Please try:

https://admin.fedoraproject.org/updates/NetworkManager-0.7.2.996-1.fc11,NetworkManager-vpnc-0.7.2.996-1.fc11,NetworkManager-openconnect-0.7.2.996-1.fc11,NetworkManager-pptp-0.7.2.996-1.fc11,NetworkManager-openvpn-0.7.2.996-1.fc11

and let me know if that fixes the problem.  The upstream fix for the
issue is:

0.7.x: http://cgit.freedesktop.org/NetworkManager/NetworkManager/commit/?h=NETWORKMANAGER_0_7&id=e44e908747edc8eb61506bb29e7ac24292f7565c
0.8.x: http://cgit.freedesktop.org/NetworkManager/NetworkManager/commit/?id=a7e3d2acc29d3e7c267298df9a19a514ca628b37

Thanks!
Dan

Gmane