15" screen problems.

Discussion in 'Troubleshooting' started by tadpole1, Feb 7, 2014.

  1. tadpole1

    tadpole1 New Member

    Joined:
    Feb 7, 2014
    Messages:
    2
    Likes Received:
    0
    Hello everyone!
    I've spent several days and many hours on this, and can't seem to find a solution. So here I am..
    My problem:
    I'm unable to get my 15" screen to work with a udoo dual. I have followed the tutorials but no luck. The screen's backlight is on, but nothing appears on the screen. I have *updated* the bootloader (I think it is the bootloader at least) as per the tutorial.
    I have a serial connection to the device, and enter the parameters as follows for a debian installation:

    setenv mmcargs setenv bootargs console=${console},${baudrate} root=${mmcroot} ${hdmi_patch} fbmem=24M video=mxcfb0:dev=ldb,LDB-WXGA,if=RGB24,bpp=32

    saveenv

    I have also tried using 1366x768M@60 instead of the LDB-WXGA, but that didn't help either.

    In all cases it write to MCC(0) but upon boot, I get the following:




    and then after reboot this:



    From what I can see, the screen isn't being identified, but I am not sure why. It is plugged in properly and the USB is attatched to the 3rd USB connector (it is a touch 15").

    The power supply is a 2A@12V.

    Lastly, I am able to successfully revert it back to HDMI output with the corosponding commands, so I am 99.9% sure that my syntax with the attempt to get LBD-output is correct, unless there is a typo in the tutorial.
    Any help or suggestions would be appreciated. Thank you in advance to whomever is gracious enough to answer.

    -Jay
     

    Attached Files:

  2. delba

    delba Administrator Staff Member

    Joined:
    May 8, 2013
    Messages:
    1,064
    Likes Received:
    9
    Hi, a couple of questions first:

    i assume you're using Debian is that right?

    You bought the 15" in our shop?

    Your syntax is right but i'm not 100% sure it works in Debian. I'll give it a try as soon as i can. In the meanwhile try your LVDS with Ubuntu 12.04.
     
  3. tadpole1

    tadpole1 New Member

    Joined:
    Feb 7, 2014
    Messages:
    2
    Likes Received:
    0
    Hello and thank you for the Response!
    Yes, I am using Debian, and I did purchase the Screen in your shop. I'll give your Suggestion a go, and again, I do appreciate you looking into this.
    Many thanks!

    Jay
     
  4. delba

    delba Administrator Staff Member

    Joined:
    May 8, 2013
    Messages:
    1,064
    Likes Received:
    9
    I tried the LVDS 15" with Debian (last release from http://www.udoo.org/downloads/) and it works! I paste the env below just to be sure:

    setenv mmcargs setenv bootargs console=${console},${baudrate} root=${mmcroot} ${hdmi_patch} fbmem=24M video=mxcfb0:dev=ldb,LDB-WXGA,if=RGB24,bpp=32

    The only thing i can suggest you is to reflash your SD card with a brand new Debian and try again.

    Let me know.
     
  5. miousername

    miousername New Member

    Joined:
    Jun 23, 2013
    Messages:
    73
    Likes Received:
    0
    Hi,

    Which is the result of this command?

    root@debian#cat /proc/cmdline
     

Share This Page