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How to modify the default HDMI output to 1280 * 1080 and modify the default audio output to HDMI?

Ken
in Beginners

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I want the default resolution of my board to be 1280x1080 after power on, and by default my sound output is through HDMI.

Please give me some advice, Thanks.

  • Author

board: rockpi4b
image: Armbian_21.08.1_Rockpi-4b_focal_current_5.10.60_budgie_desktop.img
1.modify file /boot/boot.cmd
add in the end
    setenv video-mode rockchip:1280x720-24@60,monitor=hdmi,hpd=0,edid=0
    saveenv
and run
    $ mkimage -C none -A arm -T script -d /boot/boot.cmd /boot/boot.scr
*** The monitor displays normally and the resolution has not changed ***

2.modify file /boot/armbianEnv.txt

add this line
extraargs=drm_kms_helper.edid_firmware=HDMI-A-1:edid/1280x720.bin video=HDMI-A-1:1280x720@60

*** The monitor displays normally and the resolution has not changed ***

 

Is there anyone can give me some advice?

  • Author

I want to disable edid scan function and make the resolution in 1920x1080 when system running.

Can someone help me? THK!

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