debootstrap method does not boot

Discussion in 'General Discussion' started by jerrino77, Dec 12, 2013.

  1. jerrino77

    jerrino77 Member

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    Hello all, I am in troubles... Well, i need an armel image without graphical desktop. I've tried to install Linux, but when I remove DE i break something and i does not work anymore (same thing with Debian). Big troubles with NetworkManager, that i don't need and don't want. So i decide to create my own Debian armel "minimal" image with debootstrap method. Followed the guide EXACTLY step by step, but Udoo does not boot. Can you help me to find the reason? Thanks
     
  2. matthias

    matthias New Member

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    hi,

    stupid question - why don't you use the debian-image from this thread: viewtopic.php?f=19&t=251

    anyway... if you connect to it via serial during boot, you should see some messages - including why it isn't booting.
    or is there no message at all?
     
  3. jerrino77

    jerrino77 Member

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    thanks for the reply, Mathias. Well, i've tried the image you suggest me, but the one without DE is an armhf one, which doesn't work for me (maybe due to a libusb error) so i want a "server edition" armel. By the way, i did not try to connect with serial, i will try soon. Thanks again

    EDIT: with serial don't see nothing (black screen...)
     
  4. jerrino77

    jerrino77 Member

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    Is there a way to check if U-Boot has been written correctly on The SD card?
     
  5. jerrino77

    jerrino77 Member

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    no way, it does not boot.. But i have one doubt now.. I have partition my SD with a huge 16Gb ext3 one, this is what fdisk tells me

    Code:
    Disk /dev/sdc: 15.7 GB, 15719727104 bytes
    255 testine, 63 settori/tracce, 1911 cilindri, totale 30702592 settori
    Unità = settori di 1 * 512 = 512 byte
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Identificativo disco: 0x000c5093
    
    Dispositivo Boot      Start         End      Blocks   Id  System
    /dev/sdc1            4096    30701567    15348736   83  Linux
    So, the command described in the guide
    Code:
     (Replace u-boot-q.bin with the name of the U-Boot file you downloaded)
       dd if=u-boot-q.bin of=/dev/sdb bs=512 seek=2 skip=2
       NOTE: We are using /dev/sdb here, NOT sdb1, Also, be sure sdb is the sd card
    is good for me or i have to specific some other parameters? I've read somewhere that u-boot MUST BE at 1024, but my partition starts at 4096.
    is it writed anyway even if space 0-4095 is "not allocated"?
    Thanks
     
  6. Lifeboat_Jim

    Lifeboat_Jim New Member

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    offset of 1024 sounds right to me.
     
  7. jerrino77

    jerrino77 Member

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    Hello Lifeboat_Jim, but that command does not work (not booting at all, serial console don't show anything) BTW i have no problems with precompiled images. So what's the clue? I have to format my SD card in other way?
     
  8. EBrown

    EBrown New Member

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    Everything I've read says the MicroSD card should be formatted as FAT32.

    Thanks,
    EBrown
     
  9. jerrino77

    jerrino77 Member

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    Well, no, The tutorial from eLinux says to format sdcard with ext3
     
  10. matthias

    matthias New Member

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    ext3 is fine for it - but how much space did you leave in front of the ext3-partition?

    you have to keep in mind to leave space for uboot, as it isn't flashed to this partition, but to the sd-card directly (meaning it has to be before this partition)
    if you didn't leave enough space (I'm using 10MB atm), you will overwrite the first part of your partition, which might cause your partition not to boot correctly.

    another thing i just noticed - in the post above you have sdc1 as your sd-card... but the dd-command you posted uses of=/dev/sdb - which would not write uboot to the sd-card, but to "something" else... whatever sdb is.
     
  11. jerrino77

    jerrino77 Member

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    Hello mathias, in effect i was suspecting that there no will be enough space at start of SDcard, i left 2047 blocks, maybe is too small?
    Now i will try with 10mega
    PS. of course i have adapted the example above to my correct path.. :D
     
  12. Flamenawer

    Flamenawer Member

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    I have the same problem.Uformated 10mb,and 15gb in ext3. I follow 3 tutorials,no errors,but black screen at boot
     
  13. jerrino77

    jerrino77 Member

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    Got it!!!!!!! this is the command:

    Code:
    dd if=u-boot.imx of=/dev/<your-sd-card> bs=1k seek=1
    and it works... No wait, i can see uboot output messages, like this
    Code:
    mmc0 is current device
    Failed to mount ext2 filesystem...
    ext2? why? Obiviously system don't start...
     
  14. Flamenawer

    Flamenawer Member

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    Success!! i unmount all partitions of /Dev/sdx ,(look sdx with fdisk -l)
    I install ubuntu 13.04 armhf core, for de moment no gui, i will install unity, if no work, gnome.
     
  15. jerrino77

    jerrino77 Member

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    well, weird things with u-boot...
    1. i have changed some bootenv parameters, but even i reflash "fresh" u-boot on sdcard, i will not reset the custom commands. Where "config files" are stored in? BTW, i erase whole SD card (dd if=/dev/zero) then reflash u-boot and then it restarts. but..
    2. I have this error:
    Code:
    ## Booting kernel from Legacy Image at 12000000 ...
       Image Name:   Linux-3.0.35
       Image Type:   ARM Linux Kernel Image (uncompressed)
       Data Size:    4372604 Bytes = 4.2 MiB
       Load Address: 10008000
       Entry Point:  10008000
       Verifying Checksum ... Bad Data CRC
    So, u-boot finds the uImage but won't load it? Why? (sha-1 is correct)
     
  16. jerrino77

    jerrino77 Member

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    Up for me.. Anybody had The same issue? FYI i have reflashed a precompiled image (debian armhf) and all worked..
     

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