[mythtv-users] Mythtv-frontend operation with 4K TV?

Erik Merkle mythtv at emerkle.net
Wed Sep 9 13:46:13 UTC 2020

I'm not an expert, but the only advantage of using a lower resolution
would be to reduce the workload on the video card. But as you said,
the 1030 can handle 4k content just fine. I have a 1030 GT myself
with a 4K display and I've had it set to 4k for a while now. I did have
it set to 1080 initially, but that was because my MythTV system seemed
to struggle keeping up. The problem was that I didn't have my Nvidia
settings correct for Xorg, and it was actually doing software rendering.
Once I fixed the config, it's been just fine at 4k.

My vote, leave it at 4k.


On Wed, Sep 9, 2020 at 8:12 AM Jim Abernathy <jfabernathy at gmail.com> wrote:

> I know that mythfrontend on an x86_64 Linux PC works at 4KP60 resolution
> on a UHD TV and seems to perform well. However, is that really the best
> way to run it.  Is there any advantage to forcing the PC to
> 1920x1080 at 60Hz before launching mythfrontend?
> The reason I ask is that I've been fighting a problem with having
> multiple source devices connected to my 4K UHD Samsung TV.  My current
> solution is to use a 5x1 HDMI 2.0 4Kp60 switch with all devices plugged
> into the switch and the switch connected to one of the TV's HDMI input
> and the Samsung's setting set to HDMI 2.0 so all the modes will work for
> my input devices, like the Raspberry Pi. Nvidia Shield TV and Nvidia
> GT1030 video card in a PC.
> I have 2 choices with my PC setup when using it from across the room
> because I need to set the resolution bigger than 4K yields. I can do
> that with either 1080P mode in the Display settings app or using the
> native 4KP60 mode with the Appearance app set to 2x on the scaling of
> the desktop.
> Since the HDMI switch moves the connections from the different input
> devices, the PC seems to be sensitive to that and switches back to 4K
> mode if I had it set to 1080P mode. So my current choice is to leave the
> PC setting for display at 4Kp60 so the switch has no affect on the
> display as long as I keep the scaling at 2x for view usability.
> So that leaves me wondering about my original question, is there any
> advantage to forcing the PC to 1080P mode before launching mythfrontend
> vs. leaving it in native 4K mode. The Nvidia GT1030 seems to not care as
> the picture looks fine either way.
> Jim A
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