RPi4 - signal hdmi0 and hdmi1

Hello,

I’m trying to get signal both from hdmi0 and hdmi1. A 7" touchscreen and a Samsung 48" works well on hdmi0, but connecting to hdmi1 shows a black screen only. The configuration “framebuffer_priority=7” (hdmi1-port) in the config.txt file shows that cables and hdmi1 works also fine.
Well the problem is that either hdmi0 or hdmi1 is working at the same time. Is there a opportunity to fix it?
This is the config.txt file:

initramfs volumio.initrd
gpu_mem=64
max_usb_current=1
dtparam=audio=on
audio_pwm_mode=2
dtparam=i2c_arm=on
disable_splash=1
7inch Touchdisplay
[HDMI:0]
hdmi_group=2
hdmi_mode=87
hdmi_cvt 1024 600 60 3 0 0 0
hdmi_force_hotplug=1
Samsung TV
[HDMI:1]

  • for the samsung tv are different solution settings possible, which work well -

Thank you for your help and excuse my bad english :blush: