Ok so setting it to limited range appears to have been a fluke because my log of further troubleshooting makes it evident.
Below i am pasting a text log of further troubleshooting tests i did, it does seem to suggest a faulty HDMI cable, Maybe the second HDMI cable i used to test twice also was faulty
i’m going to try and see if i can find another HDMI cable to test to see if that gives me any more information
but I’m wondering why disabling the monitor in device manager stops the issue if it is a faulty HDMI cable
<span style="color:#323232;">Monitor resolution test:
</span><span style="color:#323232;">
</span><span style="color:#323232;">PC Resolutions:
</span><span style="color:#323232;">
</span><span style="color:#323232;">800x600:
</span><span style="color:#323232;">
</span><span style="color:#323232;">144hz, 8bpc, Full Dynamic Range: Working at current time
</span><span style="color:#323232;">*does not scale to full screen size and has black borders
</span><span style="color:#323232;">60HZ, 8bpc, Full Dynamic Range: Working at current time
</span><span style="color:#323232;">*With this one monitor or windows or gpu scales to the full screen size
</span><span style="color:#323232;">60HZ, 10bpc, Full Dynamic Range: Working at current time
</span><span style="color:#323232;">*monitor or windows or gpu scales to the full screen size
</span><span style="color:#323232;">60HZ, 12bpc, Full Dynamic Range: Working at current timr
</span><span style="color:#323232;">*monitor or windows scales to the full screen size
</span><span style="color:#323232;">
</span><span style="color:#323232;">1024x768:
</span><span style="color:#323232;">
</span><span style="color:#323232;">144hz, 8bpc, Full Dynamic Range: Working at current time
</span><span style="color:#323232;">*Does not scale to full screen size
</span><span style="color:#323232;">
</span><span style="color:#323232;">60Hz, 12bpc, Full Dynamic Range: Working at current time
</span><span style="color:#323232;">* Scales to full screen size
</span><span style="color:#323232;">
</span><span style="color:#323232;">1152x864:
</span><span style="color:#323232;">
</span><span style="color:#323232;">144hz, 8bpc, Full Dyanimc Range: Working at current time
</span><span style="color:#323232;">*Does not scale to full screen size
</span><span style="color:#323232;">
</span><span style="color:#323232;">========
</span><span style="color:#323232;">
</span><span style="color:#323232;">Later Steps:
</span><span style="color:#323232;">
</span><span style="color:#323232;">2560x1440 at 12bpc 60hz full dynamic range works, so does 144hz 8bpc but this is after going through various resolutions in increasing length as documented in this text document
</span><span style="color:#323232;">
</span><span style="color:#323232;">turning monitor off and on at this point in time does not reintroduce issue
</span><span style="color:#323232;">
</span><span style="color:#323232;">next step is unplugging and re-plugging hdmi cable
</span><span style="color:#323232;">
</span><span style="color:#323232;">re-plugging hdmi cable after approximatly 30 seconds, this reintroduces issue, changing to limited in nvidia control panel does not fix this
</span><span style="color:#323232;">
</span><span style="color:#323232;">changing to 800x600 pc resolution after unplugging and replugging hdmi cable with nvidia control panel set at 144hz, 8bpc and limited dynamic range does not fix issue
</span><span style="color:#323232;">
</span><span style="color:#323232;">then changing refresh rate to 60hz does not fix issue
</span><span style="color:#323232;">
</span><span style="color:#323232;">setting to 1440x2560 before rebooting to see if rebooting does something
</span><span style="color:#323232;">
</span><span style="color:#323232;">after laptop the nvidia control panel resolution was at 800x600 and the issue wasnt there but changed to 1440x2560 at 144hz 8bpc and issue started
</span><span style="color:#323232;">
</span><span style="color:#323232;">disabling the monitor at this point in time in the device manager still fixes the problem (but breaks windows nightlight from working on external monitor as i have personally noticed when first trying to use windows nightlight after disabling the monitor in the device manager)
</span><span style="color:#323232;">
</span><span style="color:#323232;">setting to 60hz, 8bpc 800x600 resolution
</span><span style="color:#323232;">
</span><span style="color:#323232;">enabled in device manager, monitor blanks once but issue goes away
</span><span style="color:#323232;">
</span><span style="color:#323232;">going to unplug and re-plug cable
</span><span style="color:#323232;">
</span><span style="color:#323232;">re-plugged hdmi cable after 30 seconds, monitor blanks once but is stable and issue is gone
</span><span style="color:#323232;">
</span><span style="color:#323232;">noted that output dynamic range in nvidia control panel is still set to limited
</span><span style="color:#323232;">
</span><span style="color:#323232;">going to set to full dynamic range
</span><span style="color:#323232;">
</span><span style="color:#323232;">at 8bpc, 60hz 800x600 at full dynamic resolution issue does not present itself
</span><span style="color:#323232;">
</span><span style="color:#323232;">going to unplug and re-plug cable while the display resolution settings remain the same in nvidia control panel
</span><span style="color:#323232;">
</span><span style="color:#323232;">plugging in cable after aproximatly 30 seconds, monitor blanks once but issue does not present itself
</span>