[Siutsch]

I would try connecting ur htpc directly to the projector, rebooting the computer and see if that works. could try different hdmi cable as well....

But my PS3, who can play 3D Blurays can play them through the HDMI switch and my beamer detects 3D automatically if I use this, so I think, it must work with my HTPC too.

Also part of your problem may be a timing issue, so make sure the projector is on first before your computer reboots or turns on.

Thank you both for these tips, I will try that and report back.

I connected my HTPC directly to my beamer with a 15m HDMI cable and now KODI let me set the Preferred Mode to Hardware based, without a reboot of Windows.

Unfortunately my Ligawo HDMI switch has no EDID Manager build in (newer ones have), so I ordered an additional EDID manager.

Thanks for that fantastic tip.