Seeing nothing after first time turning on Udoo

Discussion in 'UDOO 101' started by zhunping, Mar 14, 2015.

  1. zhunping

    zhunping New Member

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    Hi, I got Udoo and followed the get-started instructions (http://www.udoo.org/getting-started/#tab2) to step 3:
    After I turned on the Udoo (the lights on the board lighted up), I saw nothing on the monitor. Is there anything I can do to debug it?

    I'm connecting it to a Apple 27' thunderbolt display through a HDMI-MDV adapter. I installed Linux Quad version on the SD card. By the way Mac does not recognize the SD card after I installed the OS on it.

    Wonder if there is anything I did wrong? Thanks a lot!!!
     
  2. ivan

    ivan Member

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    I dus encouter the same probleem.
    i geve several monitors, and a fresh installation Works inkt with Ine monitor, an a tv with HDMI input.
    From there i hope hou can adjust via udoo config the proper monitor.

    It is normaal that hou os grom Apple cant read the udoo os, totaly defferent os.
     
  3. Andrea Rovai

    Andrea Rovai Well-Known Member

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    Hello all,
    1) @zhunping, have you tried also other HDMI monitor to exclude other problems?
    2) @ivan: try to verify the sha1 of the image you downloaded. Anyway, try to reflash the OS and verify if now it works.
    Cheers!
     
  4. zhunping

    zhunping New Member

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    @Andrea Roval. thanks for the reply. I have not tried any other HDMI monitors, I'm thinking about ordering an Udoo monitor.

    By the way, I followed the trouble-shooting post (http://www.udoo.org/faq-items/why-my-udoo-wont-boot/) and connected Udoo to Mac using serial port. It returned nothing which falls into the 4-th category. It says it means the image was not correctly flashed. I tried a few times always got the same problem. I think the SD card is ok because the first time I plugged it into the Mac I can read the content on it.

    I wonder if buying an Udoo monitor sounds like the best way to try to solve it at this point? Thanks!
     
  5. zhunping

    zhunping New Member

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    @Andrea, never mind, just ordered a 7" touch, will see if it works
     
  6. Andrea Rovai

    Andrea Rovai Well-Known Member

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    Hi zhunping,
    any news regarding your problem?
     
  7. zhunping

    zhunping New Member

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    Hi Andrea,

    I've got the screen and I plug it in, it still shows nothing. So what did is:

    1. flushed Ubuntu onto a 8gb microSD following the instructions in the getting started area.
    2. connected power and the 7' screen to Udoo

    nothing shows up. I haven't tried to connect keyboard / mouse / network to it yet, but I guess it should already boot up and show something. Do you think I need to put more than just the microSD card + power + monitor to see the system booting?

    Thanks.
     
  8. TomFreudenberg

    TomFreudenberg Member

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    Hi, if you use a serial/usb connection from your UDOO to your MAC and e.g. the MAC SerialTools App, you should be able to connect to the very first boot prompt. So please use setting of 115200-N-8-1 and connect BEFORE powering. The SerialPort for the device should be SLAP_USBtoUART

    http://www.w7ay.net/site/Applications/Serial%20Tools/

    If you plug-in POWER you should IMMEDIATLY see the boot process

    If this does not happen, your SD-CARD ist NOT FLASHED correctly.

    ----

    Most of the time, the BOOTLOADER is wrong. Please check wether you have a DUAL or a QUAD board and reflash at least the bootloader.

    Download appropriate U-BOOT from

    http://www.udoo.org/downloads/#tab2

    Follow guide to update U-BOOT:

    see paragraph "Install the U-Boot" near end of the page

    http://www.elinux.org/UDOO_creating_a_b ... d_binaries

    -----

    Whatever OS you want to start, your SD-Card must begin with the BOOTLOADER and the debug output.

    Good luck
    Tom
     
  9. TomFreudenberg

    TomFreudenberg Member

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    Attention: Jumper J1 has be closed for the debugging output
     
  10. team_udoo

    team_udoo Administrator Staff Member

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    You must configure the u-boot to work with LVDS screens, as the default video output is set to HDMI.
    Since in your case it fails, my advice is to configure it via SSH:

    - Connect UDOO via ethernet to your router
    - Discover your UDOO's IP like shown in this tutorial http://udoo.org/tutorial/find-ip-address/
    - Connect via SSH, like in this tutorial http://udoo.org/tutorial/connecting-via-ssh/ (user root, password ubuntu)
    - Set LVDS output, with UDOO's configuration tool from command line:

    udoo-config boot_video ldb LDB-WVGA

    - Then reboot and enjoy your 7'' panel!

    Let me know how it goes
     
  11. zhunping

    zhunping New Member

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    Hi Tom and Team_udoo,

    Thanks for your replies! Let me try it again
     
  12. zindhu

    zindhu New Member

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    Hi andrea,
    I have problem with him, but i these case i make with windows. Can help me to solve it?

    Sent from my SM-N900 using Tapatalk
     
  13. Andrea Rovai

    Andrea Rovai Well-Known Member

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    Hi zindhu,
    could you better specify your problem? What do you make with windows?
    Cheers
     

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