Hdmi not working

[s.stucchi]

Hi,

I am still struggling in understanding what you  want to explain. Each new post I am getting more and more information from you but more confused than before


1. I have never tried a hdmi to vga adapter ... so I cannot give you any information if this type of adapter works the same as a standard direct hdmi to hdmi cable. The latter case is the only connection I used since 6 years with netPI only.

2. You say something about xfe desktop. How do you get it activated? Are you using netPIs original SD card and OS or are you using a different OS with you own SD card? Or are you using a Docker container example we made years ago here https://hub.docker.com/r/hilschernetpi/n...sktop-hdmi ?

3. Can you confirm that you see console outputs ALWAYS after you powered your netPI or not. I mean ALWAYS until netPI starts activating the desktop? Because console outputs is a MUST HAVE and tells me your netPI is working correctly on HDMI.

4. What happens if you are trying to connect your netPI via HDMI to a HDMI monitor? Is netPI then operating normal?

5. Just in case you are using the docker desktop example from here https://hub.docker.com/r/hilschernetpi/n...sktop-hdmi that we made public as a template to users I would say that I am not sure if I have ever started and used it without keyboard and mouse ... since this is in my eyes a setup a Desktop is made for. Since it is an open source code example located here https://github.com/HilscherAutomation/ne...sktop-hdmi, everybody is invited to copy it and make his own modifications to create his own Desktop and setup. What I also can definitively say is that during starting the desktop container via the https://github.com/HilscherAutomation/ne...rypoint.sh start script, this script maps all input devices from /dev/input into the container so that keyboard and mouse can get reachable in the container. 

Thx
Armin

Ok, here the is what i've done, i've installed the https://hub.docker.com/r/hilschernetpi/n...esktop-hdmi, connect a usb mouse, keyboard and a hdmi to vga adapter.
In these condiction all works well i can view the desktop of the netpi-desktop-hdmi image. The problem are some artifact (some strange lines appears on the monitor), and if i disconnect the mouse or keyboard the monitor show nothing.

I retry with a single hdmi - hdmi cable, and this works perfect, just like you said. Even without have attach mouse or keyboard i can see the monitor, and if i start with the mouse and keyboard attached and after i detach, the monitor still show without any problem.

Maybe the problem is the hdmi - vga adaptor that create some problem, but for my test i can use the hdmi-hdmi adapter.

Only one thing, is there a way to recognize a mouse or keyboard after the start of the netpi-desktop-hdmi image? If the mouse/keyboard are not present at start the sistem don't recognize it until you restart all the system.

Thanks