On 10/07/2012 10:21 PM, Mikus Grinbergs wrote:
IIRC, Richard warned about connecting an XO's USB socket to any USB device where that devices's USB socket can emit power (that sets up a condition where a non-XO device can try to send power to the XO -- which is a no_no).
The details are fuzzy but in Kevin's case I believe he was trying to use a external CDROM that drew a lot of juice tying to spin up and fail. To compensate he was connecting one of those rechargeable batteries with a 5V USB output via a Y cable. So now you have 2 power sources fighting it out on the USB bus and the XO-1.5 would lose.
So when i plug one usb device into the xo be it an ipod or a cell phone while running on battery the screen goes white and the laptop reboots. It works fine when plugged in charging though. I just wanted to let you all know what im experiencing. I believe the devices are drawing too much current from the laptop and forcing a reboot. It doesnt matter which usb port i plug it into.
What production rev model is your 1.5? Did you get it from the developer program? I have a vague recollection that some of our earlier runs of 1.5 had a USB issue like that.
-- Richard A. Smith <rich...@laptop.org> One Laptop per Child _______________________________________________ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
