VIM2 4.9kernel xrandr: Failed to get size of gamma for output default

VIM2
1

I used Debian_4.9_lxde image, the system only one display resolution 1920x1080. When use xrandr command,output error:

khadas@Khadas:~/Desktop$ xrandr
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 1920 x 1080, current 1920 x 1080, maximum 1920 x 1080
default connected 1920x1080+0+0 0mm x 0mm
1920x1080 0.00*

How fix this error------xrandr: Failed to get size of gamma for output default

2

Yes, you can’t use xrandr under 4.9 kernel.

If you want to change the resolution, you can check this doc.

https://docs.khadas.com/vim2/HowToSetupHDMI.html

1 Like
3

Yes, I changed file: /boot/env.txt.

hdmi_autodetect=yes --> hdmi_autodetect=no
hdmi=720p60hz

It looks fine. But where is HDMI Resolution application, in ubuntu gnome desktop only? Can’t find in lxde. and in lxde desktop no /sys/class/amhdmitx/amhmditx0/