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I am on a BeagleBone Black with Debian Jessie 8.5 , so the BBB boots from the eMMc.

My goal is to use SPI, but the cape manager was not available so according to RobertCNelson , I have set the linux image 3.8.13.

Everything boots fine, but when I follow the steps to use the SPI0 described on elinux that enables spidev, it doesn't boot anymore :

mount : can't find /root in /etc/fstab
Target filesystem doesn't have requested /sbin/init
mount : mounting /dev on /root/dev failed : No such file or directory
No init found. Try passing init= bootarg

With Busybox and the (initramfs) prompt, I have manually mounted the /dev/mmcblk0p1 partition on /mnt. Fstab is ok, but the /mnt/boot/uboot directory is empty.

Can anyone please tell me how to fix it ?

EDIT : Here is my /boot/uEnv.txt file : 

    #Docs: http://elinux.org/Beagleboard:U-boot_partitioning_layout_2.0

    uname_r=3.8.13-bone68
    ##uuid=
    #dtb=

    ##BeagleBone Black/Green dtb's for v4.1.x (BeagleBone White just works..)

    ##BeagleBone Black: HDMI (Audio/Video) disabled:
    #dtb=am335x-boneblack-emmc-overlay.dtb

    ##BeagleBone Black: eMMC disabled:
    #dtb=am335x-boneblack-hdmi-overlay.dtb

    ##BeagleBone Black: HDMI Audio/eMMC disabled:
    #dtb=am335x-boneblack-nhdmi-overlay.dtb

    ##BeagleBone Black: HDMI (Audio/Video)/eMMC disabled:
    #dtb=am335x-boneblack-overlay.dtb

    ##BeagleBone Black: wl1835
    #dtb=am335x-boneblack-wl1835mod.dtb

    ##BeagleBone Green: eMMC disabled
    #dtb=am335x-bonegreen-overlay.dtb

    cmdline=coherent_pool=1M quiet cape_universal=enable

    #In the event of edid real failures, uncomment this next line:
    #cmdline=coherent_pool=1M quiet cape_universal=enable video=HDMI-A-1:1024x768@60e

   ##Example v3.8.x
   #cape_disable=capemgr.disable_partno=
   #cape_enable=capemgr.enable_partno=

   ##Example v4.1.x
   #cape_disable=bone_capemgr.disable_partno=
   #cape_enable=bone_capemgr.enable_partno=

   ##enable Generic eMMC Flasher:
   #cmdline=init=/opt/scripts/tools/eMMC/init-eMMC-flasher-v3.sh

   #Load SPI
   optargs=quiet drm.debug=7 capemgr.enable_partno=BB-SPI0-01

   uuid=29dc1724-e732-4f02-91d1-7b206a4cb317
RebeCca
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  • Sounds like by editing the uEnv you have broken the kernel cmdline. Double check what you did, it might be a linebreak in the wrong spot or spurious quotation marks. – TBR Aug 10 '16 at 17:17
  • Thank you for your answer. I have added my `/boot/uEnv.txt` file, the only thing that I have added are : `#Load SPI` `optargs=quiet drm.debug=7 capemgr.enable_partno=BB-SPI0-01` but I don't see anything wrong – RebeCca Aug 11 '16 at 13:51
  • Note that in this case you need to see what /etc/fstab says in the initramfs and not the one on the eMMC as that's what is not finding "/root". – Tom Rini Aug 11 '16 at 14:10
  • I have copied `/mnt/etc/fstab` to `/etc/fstab`, but after reboot the file disappeared :/ – RebeCca Aug 11 '16 at 14:54

0 Answers0