On Tue, Feb 14, 2017 at 7:02 PM, mzimmers <[email protected]> wrote:

>
> William: I do in fact own a debug cable. I'll try plugging it in and see
> if I can see anything. I've never worked with boot arguments; can you tell
> me where they're kept?
>
> mz
>

root@beaglebone:~# lsblk
NAME         MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
mmcblk1boot0 179:16   0    2M  1 disk
mmcblk1boot1 179:24   0    2M  1 disk
mmcblk0      179:0    0 14.7G  0 disk
`-mmcblk0p1  179:1    0  1.7G  0 part /
mmcblk1      179:8    0  3.6G  0 disk
`-mmcblk1p1  179:9    0  3.6G  0 part

root@beaglebone:~# mkdir a

root@beaglebone:~# mount /dev/mmcblk1p1 /root/a/

root@beaglebone:~# cd a/

root@beaglebone:~/a# nano boot/uEnv.txt

You're looking for( Whichever line has this and is not commented out)
-> cmdline=coherent_pool=1M
quiet

Remove the "quiet" off the end, then save / exit the file then reboot -
>From the emmc of course. Observe the serial debug output. Also, at least
one person I can remember reported issues with booting without the quiet
option. So perhaps you may want to put it back after you're done getting
your verbose information ? Up to you.

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