well it happened when I pluged the elgato hd60x from my pc to my monitorThe way you said that makes no sense to me, but it's enough that a screenshot might clear it up. But that screenshot is not OBS. What are you asking???
I wonder though, if it's a Windows problem or a hardware problem, and not OBS at all, because the Windows welcome screen doesn't fill the monitor either.
There's some communication that happens in the video cord, more than just the video itself, so that the computer can know what the monitor is capable of, set its default to what the monitor wants, and only give you a set of options that the monitor can support.well it happened when I pluged the elgato hd60x from my pc to my monitor
Thanks for your time it appears that my monitor (3440x1440) is not compatible with the Elgato hd60x so I guess I have to use my second monitor as my mainThere's some communication that happens in the video cord, more than just the video itself, so that the computer can know what the monitor is capable of, set its default to what the monitor wants, and only give you a set of options that the monitor can support.
If you put something in between, then that something probably took over that communication, and gave its own default and set of options. The monitor then, doesn't have a say anymore, and has to just take what it gets.
You *might* still be able to go into Windows' Display Settings (log in, right-click the desktop, towards the bottom of that menu) and choose a resolution from the list that the capture device provided, that also makes the monitor more happy.