Hello.
No hdmi output while connecting to :
a) TV ( on hdmi port )
b) laptop ( with hdmi to usb converter – (hdmi video capture))
first laptop is ASUS g731gv withNVIDIA TU106M – RTX2060 mobile plus Intel UHD 630 (driver i915)
nvidia driver nouveau
second laptop is ASUS g75vw with NVIDIA GF114M – GeForce GTX 670M
driver nouveau
following is output of command echo “xrandr -q”, “xrandr --listproviders”, “xrandr --listmonitors”, “zypper se xf86”, “lsmod | grep nouveau”, “lspci -nnk | grep -i -E ‘VGA|3D|Display’ -A 5”, "lspci -nnk | grep -i -E ‘VGA|3D’ -A 3"“cat /proc/acpi/bbswitch”, “inxi -Gxxx” as normal user, and using sudo.
I found where my problem come from.
On opensuse leap 15.4, you must first make all the connections. Then power on the computer which receive the hdmi signal then power up the computer which send the hdmi signal.
You can also logout then login the computer which receive the hdmi signal.
It seems that the hdmi port which send the signal must found a device connected to the port before activing it.
On windows 10, you can start your browser, connect to netflix, start the film, then connect the hdmi cable to the monitor.
With leap you must at least logout, then login.
That is my conclusion from the test I have done these days.