So I have a steamlink that always worked perfectly full screen on my TV (HD). before I wanted to start, he did a steamlink update and when opening steamlink everything was still fine, but from the moment you start the stream, he only uses part of the screen.

I ve checked the internet, but none of the issues seemed the exact same.

it is not about borders, margins or overscan

I feel like steam is sending a bigger image (blue + blackish area), but only using part of it? since the rest is not pitch black (if i put my TV on 4:3, I see actual black on the sides, same with some other modes like zoom)

when i change the resolution (eg to match to client) he s making everything bigger inside the blue area.

I enabled the detailed debug overlay, and that renders at the bottom, left to right (in the gray area) confirming the image coming from the host is big, but only a small portion of the actual image is used for rendering steam or games..

any ideas?

Link to old fashioned screenshot (aka photo of a screen) [1drv.ms]
Link to logs [1drv.ms]