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TI Home » TI E2E Community » Support Forums » ARM® Processors » Sitara™ ARM® » AM3x Sitara ARM Processors Forum » /dev/fb0 problem on beaglebone
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/dev/fb0 problem on beaglebone

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Mehmet Kurnaz15096
Posted by Mehmet Kurnaz15096
on Jan 12 2012 09:45 AM
Intellectual560 points

Hello,

I bought beaglebone and boot with default sdcard.  I mounted lcd device(800x480) and saw console on lcd.

Then I tried with nfs_boot and couldn't see anything. And at start up I got "Error opening /dev/fb0: No such device" message. There is no /dev/fb0 device. I created t like below but it didn't run.

mknod /dev/fb0 c 29 0

What should I do?

Thanks.

Mehmet

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  • mahanteshwari hiremath
    Posted by mahanteshwari hiremath
    on Feb 07 2012 23:53 PM
    Prodigy10 points

    hi,

    I am also facing the same problem.

    I am using linux 3.1.0-rc8 which comes default with beagle bone board.

    as it is not crating /dev/fb0 device, I tried configuring and compiling the kernel mannually, but still the frame buffer device is not getting created.

    I want to run one small QT application on it.

    Can anyone suggest me how to go ahead......

    Regards,

    mahanteshwari.

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  • Mehmet Kurnaz15096
    Posted by Mehmet Kurnaz15096
    on Feb 08 2012 05:27 AM
    Intellectual560 points

    mahanteshwari,

    If you don't use daughter board, you have to add "lcdc_init" and if you want tsc_init to beaglebone_dev_cfg[] in arch/arm/mach-omap2/boardam335xevm.c file .

    /* Beaglebone Rev A3 and after */
    static struct evm_dev_cfg beaglebone_dev_cfg[] = {
    {mii1_init, DEV_ON_BASEBOARD, PROFILE_NONE},
    {usb0_init, DEV_ON_BASEBOARD, PROFILE_NONE},
    {usb1_init, DEV_ON_BASEBOARD, PROFILE_NONE},
    {mmc0_init, DEV_ON_BASEBOARD, PROFILE_NONE},
    /**
    Mehmet Kurnaz 13/01/12
    enable lcd and ts on beaglebone without daughter board
    */
    {lcdc_init, DEV_ON_BASEBOARD, PROFILE_NONE},
    {tsc_init, DEV_ON_BASEBOARD, PROFILE_NONE},
    {NULL, 0, 0},
    };

    Thanks

    Mehmet Kurnaz

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  • David38506
    Posted by David38506
    on Feb 14 2012 08:51 AM
    Intellectual260 points

    Greetings,

     

    As a linux newbie, this post has been most helpful along with several links to the Graphics SDK GSG and Adding DVI resolutions.

    We wish to add a 320x240 custom panel to the BeagleBone running in portrait vs. landscape orientation.

    I've found the generic_dpi_panels structure in the .../drivers/video/omap2/displays/panel-generic-dpi.c file and the modedb (fb_videomode) structure in drivers/video/modedb.c.

    Should making changes in these two areas along with adding the omap.dvi setting in the bootargs be sufficient to begin running the SDK Matrix demo on our LCD?

    I'm preparing for on the hardware development of an interface board and want to be ready when it's available.

    Dave

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  • Giulio Dalla Vecchia
    Posted by Giulio Dalla Vecchia
    on Aug 07 2012 03:45 AM
    Prodigy10 points

    Hi Mehmet Kurnaz,

    after entering this change:

            {lcdc_init,DEV_ON_BASEBOARD, PROFILE_NONE},
    {tsc_init, DEV_ON_BASEBOARD, PROFILE_NONE},

    we rebuild the
    kernel
    ? I ask because I find the file boardam335xevm.c only after compiling
    the kernel and not on the source
    .

    Thanks
    Giulo Dalla Vecchia
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  • azli fakhri
    Posted by azli fakhri
    on Jan 14 2013 10:44 AM
    Prodigy30 points

    hello... me also..lcd cape 4' no working in my beaglebone a6 using ti sdk.05.06.

    i can remote matrix app but nothing appear in my lcd.when i ssh ti sdk and when ts_calibrate appear no such file / directory.

    dont have /dev/fb0 in root but before compile i can see /dev/fb0 in targetNFS.

    anyone can help me step by step how to display matrix app in lcd cape 4.0.

    sorry for inconvenience for my bad english.

    thanks.

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