Hi all. I tested on os11, with all power-management disabled. 0. Insert a pen-drive. a) Inserted modem in another slot; the modem is detected. b) Reboot. c) Modem is NOT detected. d) Remove modem. e) Insert modem; the modem is detected. I tried the above steps 5 times; and the results were same. Also, please find attached a sample python script, which lists all the detected network-devices. When this script is run as "python nm_test.py" in step c), the modem-device is not detected by this script as well; whereas in other cases, this script detects the device. ================================================================================ Another sequence :: 0. Ensure that there is no pen-drive inserted in any of the USB slots. a) Inserted modem; the modem is detected. b) Reboot. c) Modem is detected. d) Remove modem. e) Insert modem; the modem is detected. I tried the above steps 5 times; and the results were same. =============================================================================================== I will try the same steps with os12, once I am finished downloading it. =============================================================================================== I don't have a XO-1.5; so can't try on it :-\ <div class="gmail_quote">On Wed, Nov 21, 2012 at 3:18 PM, Richard A. Smith <<a href="mailto:richard@laptop.org" target="_blank">richard@laptop.org</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">On 11/21/2012 01:07 AM, Jerry Vonau wrote: </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im"> Dropping the power to the usb bus is making the modem play peek-a-boo with the kernel: <a href="http://dev.laptop.org/ticket/10708" target="_blank">http://dev.laptop.org/ticket/10708</a>. </div> <<a href="http://dev.laptop.org/ticket/10708" target="_blank">http://dev.laptop.org/ticket/10708</a>> </blockquote> And just to be clear its more than just a power dropping problem. Both 1.75 and XO-4 both have the ability to keep the USB bus powered during suspend (with an EC firmware change) but on resume the kernel resets the USB bus. I don't know if the kernel has an option not to do that.<div class="im HOEnZb"> -- Richard A. Smith <<a href="mailto:richard@laptop.org" target="_blank">richard@laptop.org</a>> One Laptop per Child </div><div class="HOEnZb"><div class="h5"> _______________________________________________ Devel mailing list <a href="mailto:Devel@lists.laptop.org" target="_blank">Devel@lists.laptop.org</a> <a href="http://lists.laptop.org/listinfo/devel" target="_blank">http://lists.laptop.org/listinfo/devel</a> </div></div></blockquote></div> Regards, Ajay