Unable to access/talk to BBB after netinstalling Ubuntu

SriRam Chadalavada

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Apr 26, 2016, 6:11:42 PM4/26/16

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I am unable to access/talk to my Beaglebone Black after doing a fresh netinstall with the following command:

sudo ./mk_mmc.sh --mmc /dev/mmcblk0 --firmware --serial-mode --dtb am335x-boneblack --distro trusty

It neither shows up connected with ethernet on my network nor does the serial console connectivity display anything. And I had tried this precise method earlier and both ways to access the device were working just fine.

Please find a screenshot of the files on the programmed microSD card attached. Any help to resolve will be much appreciated!

bbb_microsd_image.jpg

William Hermans

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Apr 26, 2016, 7:10:05 PM4/26/16

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Maybe you aught to buy a serial debug cable, and see why it doesn't work. There are probably 100's of reason why this could have failed, for which a single person could probably make a different guess a day, for the next 6 months, and still guess wrong.

Passed that, only one person on this group could really start guessing, as he wrote that script, and knows how it works.

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Robert Nelson

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Apr 26, 2016, 7:51:12 PM4/26/16

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On Tue, Apr 26, 2016 at 5:11 PM, SriRam Chadalavada <chsr...@gmail.com> wrote:

I am unable to access/talk to my Beaglebone Black after doing a fresh netinstall with the following command:
sudo ./mk_mmc.sh --mmc /dev/mmcblk0 --firmware --serial-mode --dtb am335x-boneblack --distro trusty

"--serial-mode" implies connecting a physical serial port to the debug header on the black. ;)

Regards,

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https://rcn-ee.com/

Sriram Chadalavada

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Apr 27, 2016, 2:49:50 PM4/27/16

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I did have a serial debug cable connected :). Turned out the right angle serial connector between the cable and the J1 went bad.

But the BBB seems to be booting into the default debian in the eMMC rather than the Ubuntu programmed into the microSD card using netinstall.

Here's the output:

U-Boot 2015.01-00001-gb2412df (Jan 29 2015 - 15:01:06), Build: jenkins-github_B5

Watchdog enabled

I2C: ready

DRAM: 512 MiB

MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1

Using default environment

Net: <ethaddr> not set. Validating first E-fuse MAC

cpsw

Is the SD card being recognized correctly by uboot?

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Robert Nelson

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Apr 27, 2016, 2:56:07 PM4/27/16

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On Wed, Apr 27, 2016 at 1:49 PM, Sriram Chadalavada <chsr...@gmail.com> wrote:

I did have a serial debug cable connected :). Turned out the right angle serial connector between the cable and the J1 went bad.

But the BBB seems to be booting into the default debian in the eMMC rather than the Ubuntu programmed into the microSD card using netinstall.

Here's the output:

U-Boot 2015.01-00001-gb2412df (Jan 29 2015 - 15:01:06), Build: jenkins-github_B5

Watchdog enabled
I2C: ready
DRAM: 512 MiB
MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1
Using default environment
Net: <ethaddr> not set. Validating first E-fuse MAC
cpsw

Is the SD card being recognized correctly by uboot?

boot into the eMMC and:

sudo dd if=/dev/zero of=/dev/mmcblk0 bs=1M count=10

u-boot gone from the eMMC ;)

Regards,

Sriram Chadalavada

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Apr 27, 2016, 3:04:35 PM4/27/16

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u-boot gone from the eMMC ;)

I could do that but if it truly isn't recognizing the microSD, wouldn't formatting eMMC render it non-usable? I'm not that familiar with BBB, have not played around with U-boot off late nor have JTAG etc , so would rather not take a chance. Did the output indicate that the microSD is NOT being recognized? Thanks!

Regards,

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https://rcn-ee.com/

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Robert Nelson

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Apr 27, 2016, 3:08:09 PM4/27/16

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On Wed, Apr 27, 2016 at 2:04 PM, Sriram Chadalavada <chsr...@gmail.com> wrote:

On Wed, Apr 27, 2016 at 1:55 PM, Robert Nelson <robert...@gmail.com> wrote:

On Wed, Apr 27, 2016 at 1:49 PM, Sriram Chadalavada <chsr...@gmail.com> wrote:
I did have a serial debug cable connected :). Turned out the right angle serial connector between the cable and the J1 went bad.

But the BBB seems to be booting into the default debian in the eMMC rather than the Ubuntu programmed into the microSD card using netinstall.

Here's the output:

U-Boot 2015.01-00001-gb2412df (Jan 29 2015 - 15:01:06), Build: jenkins-github_B5

Watchdog enabled
I2C: ready
DRAM: 512 MiB
MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1
Using default environment
Net: <ethaddr> not set. Validating first E-fuse MAC
cpsw

Is the SD card being recognized correctly by uboot?

boot into the eMMC and:

sudo dd if=/dev/zero of=/dev/mmcblk0 bs=1M count=1

u-boot gone from the eMMC ;)

I could do that but if it truly isn't recognizing the microSD, wouldn't formatting eMMC render it non-usable? I'm not that familiar with BBB, have not played around with U-boot off late nor have JTAG etc , so would rather not take a chance. Did the output indicate that the microSD is NOT being recognized? Thanks!

Nope, you cut it off too early..

Regards,

Sriram Chadalavada

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Apr 27, 2016, 3:15:19 PM4/27/16

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Here's more output. Thanks!

U-Boot SPL 2015.01-00001-gb2412df (Jan 29 2015 - 15:01:06)

U-Boot 2015.01-00001-gb2412df (Jan 29 2015 - 15:01:06), Build: jenkins-github_B5

Watchdog enabled

I2C: ready

DRAM: 512 MiB

MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1

Using default environment

Net: <ethaddr> not set. Validating first E-fuse MAC

cpsw

Hit any key to stop autoboot: 0

gpio: pin 53 (gpio 53) value is 1

Card did not respond to voltage select!

gpio: pin 56 (gpio 56) value is 0

gpio: pin 55 (gpio 55) value is 0

gpio: pin 54 (gpio 54) value is 0

switch to partitions #0, OK

mmc1(part 0) is current device

gpio: pin 54 (gpio 54) value is 1