Hey! I got a USB to serial adapter and tried getting text on screen, but I get random symbols - like brackets, @, # and <?>. I don't get whats wrong ( I followed this site http://nullr0ute.com/2013/10/serial-console-options-on-the-beagle-bone-black/ )
Also how would modifying the uEnv.txt on the SD card help? What will make the BBB look for the SD card in the first place (Given that I'm not pressing the boot button) regds, Deepak On Tue, Jan 28, 2014 at 8:33 PM, Robert Nelson <robertcnel...@gmail.com>wrote: > On Tue, Jan 28, 2014 at 9:00 AM, deepak karki <deepa...@gmail.com> wrote: > > I'm posting after reading similar topics on this Google group, none of > the > > solutions worked. [also my problem is a bit different than the ones > before, > > I have been struggling for about a month to get my BBB working!] > > > > Here is the sequence of problems-failed solutions I have been through > with > > my board : > > 1. About a month back I bought a BBB from a local retailer. Worked > perfectly > > for first two days, I was able to ssh, install pyBBIO etc. > > 2. The next time I booted (tried to) my board, it failed. Only power > button > > was on, other LED's didn't even start blinking. I plugged out the power, > > tried 5 minutes later, it worked! ssh-ed again and shut it down (sudo > > shutdown 0) > > 3. Next time while booting, I had the same problems, removing powering > and > > starting again did not help. > > 4. I downloaded Arch Linux on a microSD card, put it into the BBB powered > > the board holding the boot button, within half a minute I was able to SSH > > again! Arch worked. > > 5. I wasn't that happy with the Arch distribution, even though it > worked. So > > I got an Ubuntu image on my microSD. Tried booting the Black the same way > > holding the boot button, but all that happened was all 4 LED's were on > for > > ~15 minutes [ I still don't know why this happens! ] Then the led's > started > > to blink, I was able to SSH. Sadly this happens every time I boot with > > Ubuntu (via microSD). > > 6. Later I thought I would re-flash Angstrom, and got the emmc-flasher > image > > on my microSD. Booted the board with the boot button pressed. According > to > > the manual the lights should have started flashing, and once the image is > > written all 4 LED's should turn on > > [http://derekmolloy.ie/write-a-new-image-to-the-beaglebone-black/ ]. > But for > > me all the 4 LED's were switched on from the power on stage, for ~5 min, > > later they started to blink, but after 10 min or so, all 4 LED's abruptly > > went off. (In the instructions it says that all 4 LED's will go on when > > writing is complete) > > 7. But anyway hoping that writing to the eMMC was complete, I booted the > > board normally. USR0 switches on first followed by USR1, USR2. Then it > > freezes here. I'm STUCK!! > > You could grab a usb-serial adapter and find out.. > > > What should I do now? > > also a couple more questions : > > - What does holding down the boot button do if the img in the SD card in > not > > a emmc-flasher? Does it just boot from the SD card or does it also get > > written to emmc? > > Holding the button guarntees it'll try to load MLO/u-boot.img from the > SD card first. > > > - Is there some setting by which I can boot via the SD card without > having > > to press the boot button every time and also not having to burn the > image on > > the emmc? > > A proper uEnv.txt in your sd card will guarntee it.. Otherwise just > "dd if=/dev/zero of=/dev/mmcblk1" bootloader gone from eMMC... > > Regards, > > -- > Robert Nelson > http://www.rcn-ee.com/ > > -- > 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/rWx-pr5CFoc/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > beagleboard+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/groups/opt_out. > -- 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 beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
