Well . . .more details are needed. But if you're wanting to troubleshoot *why* the board wont boot from the sdcard, you really need to get a serial debug cable.
The beaglebone black *will* load the first stage bootloader from eMMC first, Then it will try to load either uboot from eMMC or sdcard next. Which way around I do not recall offhand, Anyway, if you want to "boot" from sdcard first, then press and hold the boot switch at power up, and continue to hold until all 4 USR LEDs light up, then go out. IF that does not work, then there is very likely a problem with your image. Get a USB serial debug cable. On Fri, Jun 19, 2015 at 10:36 AM, Raph <[email protected]> wrote: > Hi, > > I currently have an OS flashed on the eMMC from which I can boot whithout > any issues. However, I am trying to boot another OS from an sd card but it > does not seem to work. I think that the BBB usually uses uboot from the > eMMC to boot the sd card. Perhaps the fact that I have debian flashed on > eMMC prevents me from booting from sd card? > > Any help would be greatly appreciated. > Thank you. > > -- > 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.
