Unstable HDMI signal

[deHakkelaar]

(20th Apr, 2017 05:10 PM)MichaelRu Wrote:  Unfortunately in Raspbian I didn't see what display settings it used in detail. It just used "Monitor defaults".
In Kodi I tried 1080p with 24, 30 and 60fps and 720p with 50fps. But they all showed the problem.

If you want to see current resolution displayed and some other useful info, below tool might be useful:

Terminal

$ tvservice -s
state 0x12000a [HDMI DMT (9) RGB full 4:3], 800x600 @ 60.00Hz, progressive

To see available resolutions:

Code:

tvservice -m DMT

and

Code:

tvservice -m CEA

You could also try to set a fixed resolution, instead of auto detecting, for XBian, AVR and beamer (all 3) so no cropping or other processing occurs.
Try to figure out the native resolution + framerate (Hz or fps) for the beamer and set fixed resolution for all devices accordingly.