h3disp is missing on Ubuntu xenial dev 4.9.4 desktop

[huvi]

Hi all,

 

today I tried ubuntu xenial (dev) with kernel 4.9.4 for OrangePi Plus2.

seems to work fine, but the screen resolution is 3840x2160. That is cool but a smaller resulution would be better.

I tryed to change the screen settings over Settings -> Display, but it is not possible to change the values there.

 

I also tried it with: sudo h3disp, but it is not installed on my system.

 

What is the best way to change the screen res? 

[Igor]

Nothing is missing. https://docs.armbian.com/Hardware_Allwinner/#how-to-reconfigure-video-output

[huvi]

Hi!

I don´t get it done. I can´t reduce the resulution.

 

I modified the /boot/boot.cmd and added the line:

# default values

setenv load_addr "0x44000000"

setenv rootdev "/dev/mmcblk0p1"

setenv verbosity "1"

setenv console "both"

setenv disp_mem_reserves "off"

setenv disp_mode "1920x1080p60"

setenv video-mode sunxi:1920x1080-24@60,monitor=hdmi,hpd=0,edid=0

setenv rootfstype "ext4"

...

 

Then:

$ mkimage -C none -A arm -T script -d /boot/boot.cmd /boot/boot.scr

and reboot

 

But the resulution is still 3840x2160

 

What am I doing wrong?

[Igor]

...
setenv video-mode sunxi:1920x1080-24@60,monitor=hdmi,hpd=0,edid=0
setenv rootfstype "ext4"
saveenv

You need to save uboot environment and it will manifest at second reboot. First saves, second make action. U-boot must have those parameters before reading boot script ...

[huvi]

Ahh, cool!

Now it works! Thank you very much.