Hi Meino, Thank you very much for taking your time and writing the answer. I have tried to access the board via LAN, but could not figure out how to do it. Could you please guide me? Meanwhile, I will download and boot the board with the SD Card as you have suggested.
Regards Anirudh On Tue, Dec 16, 2014 at 11:24 PM, <[email protected]> wrote: > 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 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.
