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

[Erik Merkle]

I've not run into that situation before. I have my xorg set to pin the
resolution with this line in my Screen Section:

Option         "metamodes" "1920x1080 +0+0 {
ForceFullCompositionPipeline=On }"

The only issue I have is when I reboot my machine, if the TV is not on and
connected to the machine, my display is blank. I think this is because it
can't get the EDID info from the TV, so it doesn't know how to initialize
the output. At one time I had extracted the EDID and used my xorg.conf to
specify it, but I lost that bit along the way. For me, it isn't that big an
inconvenience as I don't reboot often and it's easy to just ensure the TV
is on when I do.

I believe you can pin the output resolution to 60Hz refresh with a line
like this:

Option         "metamodes" "1920x1080_60 +0+0 {
ForceFullCompositionPipeline=On }"

I don't do that myself because I watch different content that have
different FPS (some 24, some 30, some 60) and I want the TV to switch to
whatever the content is using. Also, I want to say that I had some issues
with some content being detected as 59.XXX FPS and my TV/1030 can switch to
that output. So I opted for just pinning the resolution and letting the
refresh rate change with the content.

Hope that helps,
Erik

On Mon, May 11, 2020 at 6:00 AM Jim Abernathy <jfabernathy at gmail.com> wrote:

> 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
>
>
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://lists.mythtv.org/mailman/listinfo/mythtv-users
> http://wiki.mythtv.org/Mailing_List_etiquette
> MythTV Forums: https://forum.mythtv.org
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mythtv.org/pipermail/mythtv-users/attachments/20200511/699d84fe/attachment.htm>