[mythtv-users] Nvida card choice for mythtv and gaming

[Jim Abernathy]

Now that I have the GT 1030 working in Xubuntu 20.04 with the Nvidia-440 
driver, most things like Mythtv are working great.

However, I can't seem to keep the display at 1920x1080 at 60hz. It wants to 
switch back to 4K which is the EDID or automatic choice by default.

So on boot it uses the /etc/X11/xorg.conf file that the Nvidia X server 
setting program created to force it to 1080p. But if I switch the AV 
Receiver away for some period of time from the computer port to DVD 
player or anything else and then switch back to the computer it comes 
back as 4K like it forgot how it booted. If I switch away for a short 
time like 3-5 minutes it comes back in 1080p as I want.

I'm thinking Ubuntu is getting an event triggered by the switching back 
to computer port of the AVR and using auto settings for the display. If 
I run Nvidia X server app at this point the configuration settings are 
in auto instead of 1920x1080 at 60. I can either change it again or reboot.

Or, the display power management mode is getting in the way.  I had it 
in Presentation mode and Display power management off.  I'm running a 
test now where Presentation mode is off, but I turned on the Display 
power management but set the timer settings to 'never'. I see if that works?

Anyone know what's happening?

Jim A