Hi Anirudh, thanks for checking that! 8)
This may have been caused by either: A hardware defect, which has affected the USB interface, so the "outside world" (we are all somehow "inside beaglebone" aren't we??? :) has no chance to recognize, that there is a beaglebone plugged to the USB port. Or: Something is wrong with the software or the devicetree blob, which configures the hardware, so the hardware is not acting like something, which the "outside world" would recognize as USB... The first problem can be the result of a production failure or a discharge of static alectricity while packaging or unboxing. The second problem can be the result of...I dont know, since you haven't changed anything. Before asking for a RMA and sending it back for change, you can try the following: Download the debian image and the boot stuff and prepare a SD-card with it (be sure that the rootfs and /boot are populated). If done correctly, your beaglebone will recognize the presence of the sdcard and boot from it instead of the emmc (internal flash). Advantage here is: You have access to the sdcard even if you have no access to the beaglebone. After booting, waiting and somehow shutting down the beaglebone (dont know whether this is supported by the bottons on the beaglebone) you may have access to some logfiles under /var/log, which may give you some more informations. If the emmc was damaged either hardware related or logically (image wasn't written correctly), you may be able to boot from sdcard and get access to you beaglebone. If so, you can fsck the emmc and if ok reflash it (if you want). On the other hand: Flash memory has a limited amount of write cycles. While exclusively using a sdcard, you can swap it easily if worn...(I never touched the emmc for that reason). If the USB hardware or something related to it is damaged, you also won't be able to access the beaglebone after booting the sdcard. If USB wont run: Try to get access to the board via LAN / ethernet. Last way out: Buy a serial to USB adaptor which is recommended for being used with the beaglebone and attach this to the debug header. May be you will be able to gain access to your board. Good Luck! :)) Best Meino Anirudh Jonnadula <[email protected]> [14-12-16 18:28]: > Hi Meino, > > Thanks for the suggestion. > I have tried this, but there is no difference in the output of lsusb. > > Regards > Anirudh > > > On Tue, Dec 16, 2014 at 7:21 PM, <[email protected]> wrote: > > ZZAnirudh Jonnadula <[email protected]> [14-12-16 14:32]: > >> Hi Meino, > >> > >> Thanks for the reply. I have tested it on both Windows 7 and Ubuntu 14.04. > >> > >> Regards > >> Anirudh > >> > >> -- > >> For more options, visit http://beagleboard.org/discuss > >> --- > >> You received this message because you are subscribed to the Google Groups > >> "BeagleBoard" group. > >> To unsubscribe from this group and stop receiving emails from it, send an > >> email to [email protected]. > >> For more options, visit https://groups.google.com/d/optout. > > > > > > Hi Anirudh, > > > > ok...seems to be something with the Beaglebone... > > > > I am more familiar with UNIX and Linux, so if it is > > ok for you, I would like to suggest to use your > > Ubuntu system for checking whats going on... > > > > If not available please install > > > > usbutils > > > > (which homepage is here http://linux-usb.sourceforge.net/) > > > > Unplug the beaglebone, if not already done, then do > > a > > > > lsusb > /tmp/withoutbbb.txt > > > > then plug it in, wait a couple of seconds (only to get sure) > > and do a > > > > lsusb > /tmp/withbbb.txt; diff /tmp/withoutbbb.txt /tmp/withbbb.txt > > > > > > . If there is a difference, then you Beablebone black has been > > recognized on a low level basis. > > I recently had a Wifi USB dongle which was listed via lsusb and > > as soon as I tried to use the wlan0 interface, a message pops > > up saying, that there was no such device....hrmmmpffff...the firmware > > was missing...the usb enumeration has worked and the device was still > > sleeping. > > > > May be there is only some software missing (kernel modules) or not > > loaded. > > > > Please mail me, what the test results in :) > > > > Best regards, > > Meino > > > > > > > > > > -- > > For more options, visit http://beagleboard.org/discuss > > --- > > You received this message because you are subscribed to a topic in the > > Google Groups "BeagleBoard" group. > > To unsubscribe from this topic, visit > > https://groups.google.com/d/topic/beagleboard/N219O3AdvSc/unsubscribe. > > To unsubscribe from this group and all its topics, send an email to > > [email protected]. > > For more options, visit https://groups.google.com/d/optout. > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
