Sorry. I had connected the device to a second (newer hardware) notebook computer with same Lubuntu to check, whether it is a problem of just this particular machine or a common problem.
xrandr2 attached.
The Lubuntu monitor settings tool names the HDMI screen „BMD HDMI”, (BMD seems to mean Blackmagic Design) and thus seems to recognize the device.
Sorry. I had connected the device to a second (newer hardware) notebook computer with same Lubuntu to check, whether it is a problem of just this particular machine or a common problem.
xrandr2 attached.
The Lubuntu monitor settings tool names the HDMI screen „BMD HDMI”, (BMD seems to mean Blackmagic Design) and thus seems to recognize the device.