Hi,
I got a custom LCD (480x1920) and it works. But I want to get Xrandr work to make some rotation stuff.
But here starts the problem with the message
volumio@volumio:~$ xrandr --addmode HDMI-1 myTFT
xrandr: Failed to get size of gamma for output default
xrandr: cannot find output “HDMI-1”
My config.txt looks like this:
initramfs volumio.initrd
gpu_mem=32
max_usb_current=1
dtparam=audio=o
audio_pwm_mode=2
dtparam=i2c_arm=on
disable_splash=1
hdmi_force_hotplug=1
hdmi_cvt=480 1920 60
hdmi_drive=1
hdmi_mode=87
hdmi_group=2
dtoverlay=vc4-fkms-v3d
include userconfig.txt
It works on RaspberryPi OS .
Any ideas?