HDMI issue when changing games/from 60hz to 120hz

Yes only happens in cod games any other game I play no problem I’ve tryed changing from 4K to 1080p to 120hz to 60hz I’ve tried two different tvs with different hdmi cords

The HDMI 2.0 may only be good for 4k @60hz. The HDMI 2.1 is much better for 4k @120hz.

Have you tried to set or change those settings from your console? How about factory reset?

From the support page:

• Your display must support 120Hz over HDMI. While some monitors support 120Hz over DisplayPort, they may not support it over HDMI.
• 120Hz is only available for 1080p and 1440p. If you change your resolution to 4K UHD or 720p, the refresh rate will be set to 60Hz by default.
• If your console is set for 4K UHD and you change your refresh rate to 120Hz, your resolution will be downgraded to the highest resolution available for your display.

I don't have enough info to confirm if the Series X will be able to run 144hz on a monitor such as the one you have purchased but feel fairly confident that 120hz will be possible since it will be using HDMI 2.1

From what i've read 'HDMI to displayport' adapters are usually limited to 60hz at this point in time as most displays are using HDMI 2.0 so it wouldn't really be worth bothering with as you would still be running 60hz at 1440p as the Xbox One X uses
HDMI 2.0 which will only allow 60hz maximum for 4K or 1440p (1080p/120hz yes, but not 1440p/120hz). Even if your monitor uses HDMI 2.1 it still has to connect to HDMI 2.0 on the console so 120hz would not be possible at 1440p.

Since HDMI 2.0 is what current gen uses 60hz is the optimum setting for 4K and all games are
capped at 30-60fps on the console (also due to the fact that most console users will be connecting to TVs and 60hz is pretty much what most HD/4K TVs are capable of). This should change with the Series X which will have HDMI 2.1 (capable of 120hz)
but seems unlikely that 144hz will be possible on the console. I think the best you could expect is to be able to get 4K/120hz with HDMI 2.1 on the Series X although it is said that it will support up to 8K on TVs/Monitors that are capable.

My recommendation would be to get a monitor that's 4K HDR 120hz as this should be able to get the best of current gen (1440/60hz) and Series X (120hz) without paying extra for 144hz which, as stated in my last reply, would only be useful for Gaming PCs and
not consoles.

Hope this info helps you decide which monitor to go with and has helped in any way to make things a little clearer in regards to why the settings may be working the way they are.

Stay safe and Happy Gaming!

XBA

HDMI is not limited to 60hz though. It can do 120hz 4K.