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How to change HDMI resolution output on BeagleBoneBlack after kernel boot up?

YONG ZOU
Intellectual 380 points

Hi,

I am doing some experiments on BeagleBoneBlack board to evaluate AM335x. I have got latest SDK-Sitara 7.0.0, and ported u-boot and kernel to my own build platform which has my own root filesystem. So far, I can boot the board successfully. Now I want to change HDMI output resolution from 1028x720p-60 to 1024x768@60 after kernel boot up, does anyone know how to do it?

Regards,

Yong

  • 0
    TI__Expert 3010 points

    Hello Yong,

    If you are using fbdev driver (default driver in the kernel for SDK 7.0), then you can use fbset to change the resolution; it will allow you to set the xres and yres, among many other things.

    If you have modified the kernel to use DRM, then you will have to build and use DRM specific tools to accomplish resolution change while linux is running.

    By the way, check out this wiki page for more information on the Linux support available for LCD Controller on AM335x : http://processors.wiki.ti.com/index.php/Sitara_SDK_Linux_LCDC

    Regards,

    Josh