HDMI wrong resolution with default armbian kernel


hcac
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Armbianmonitor:

Hello. I've tried a kernel I build using the tool orange pi provides, that kernel boots with a good HDMI resolution. However, when I use the default kernel that comes with my fresh armbian installation, I can't get the HDMI resolution to 480p. I set the resolution in boot parameters.

I'd appreciate any help.

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Armbian is a community driven open source project. Do you like to contribute your code?

My guess (without looking) is that their tool uses legacy kernel.  You might have better experience with Armbian Legacy branch/kernel (like theirs, but maybe with some improvements usually).  As a workaround in the meantime.

 

I don't know much about graphical stuff, sorry.  Maybe someone comes along who does.

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On 7/11/2021 at 7:55 PM, hcac said:

I set the resolution in boot parameters.

disp_mode trick doesn't work with mainline kernels.

 

There are two ways that I know, both via kernel boot arguments:

1. Specify preferred video mode:  "video=HDMI-A-1:800x480"

2. override EDID data, like described here.

 

Note that I tested only second approach on different distro. First one should work, but maybe syntax is not completely correct (google is your friend here). Another note, if resolution you want to set is not reported by your monitor, only second approach will work.

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