Author Topic: GPD XD Plus - Screen Refresh Issue?  (Read 1406 times)

philexile (OP)

  • Posts: 63
GPD XD Plus - Screen Refresh Issue?
« on: August 29, 2018, 01:33:19 pm »
Hello,

I was browsing through the Libretro forum and came across this thread, which Skeleton posted in:

https://forums.libretro.com/t/question-about-vulkan-performance/15456/5

Skeleton said: "XD plus has a problem with screen refresh which IS essential in android And retroarch. In old XD IS perfect."

Does anyone know what the issue is exactly and if it has been addressed?

Thank you!

skelton

  • Posts: 6857
Re: GPD XD Plus - Screen Refresh Issue?
« Reply #1 on: August 29, 2018, 03:30:00 pm »
Screen refresh is not static at 59.94 hz like old xd. It sometimes go down under that, so emus that need 59.94hz for a correct play of ntsc roms can suffer some slight video&audio stuttering. It has not been adressed. Some people doesn't notice it though, but I personally (and some other people) do notice it, so makes some emulation quite useless in comparision to old xd where it was buttery smooth. But again, not all people notice it
Retired

Downsider

  • Posts: 39
Re: GPD XD Plus - Screen Refresh Issue?
« Reply #2 on: August 30, 2018, 06:08:09 am »
Just want to point out that in emulators with threaded video and the ability to disable vsync, this isn't as big of a deal as it seems. You'll get missing frames every now and then, but there won't be slowdown or anything too egregious.

philexile (OP)

  • Posts: 63
Re: GPD XD Plus - Screen Refresh Issue?
« Reply #3 on: August 30, 2018, 02:26:11 pm »
Quote
so emus that need 59.94hz for a correct play of ntsc roms can suffer some slight video&audio stuttering. It has not been adressed.

Can this be addressed or is it a limitation of the hardware?

Quote
but I personally (and some other people) do notice it,

I noticed it too. When scrolling in games, I could see a sort of judder when playing NES games.

Quote
emulators with threaded video and the ability to disable vsync, this isn't as big of a deal as it seems. You'll get missing frames every now and then, but there won't be slowdown or anything too egregious.

It is distracting though. I had threaded video on and disabled vsync and still didn't get smooth scrolling.

skelton

  • Posts: 6857
Re: GPD XD Plus - Screen Refresh Issue?
« Reply #4 on: August 30, 2018, 07:12:51 pm »
threaded video is not a solution at all, it's the best that can de done, but far from perfect.

About if can be addressed, probably, if GPD decides to do it (I suggested them a couple of things) or if someone can develop a ROM that fix it.
Retired

nex86

  • Posts: 247
Re: GPD XD Plus - Screen Refresh Issue?
« Reply #5 on: September 03, 2018, 10:01:34 pm »
I really hope they fix this. Otherwise I will get a normal XD again.
Even though its limited to 4.4 ....

 

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