Textures Flickering

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Textures Flickering

Postby ReaperAA » Tue Jan 01, 2019 12:16 am

Hi Devs, I just tried GZdoom 3.7.0 and while I am overall liking the improvements and enhanced performance, I have noticed that in some cases I see texture flickering. I noticed this initially in Extermination Day's Map-13, but it is not limited to extermination day. I also noticed this bug to a lesser extent in Hexen Deathkings. This flicker stops after a 1-2 seconds and doesn't happen again in that area though it can happen again when in a new area of the map.

I am using a laptop with both a dedicated GPU (Radeon 530) and a integrated GPU (intel UHD 620). Texture flickering only happens when using integrated GPU (However i don't want to use AMD dedicated GPU because I get much worse performance with it).

My Specs:
- Dell Inspiron 5570
- Win 10 64-bit (build 17134)
- BIOS 1.0.4
- 4GB ram
- Intel core i5-8250U
- Intel UHD 620 (integrated GPU)
- AMD Radeon 530 (dedicated GPU)
ReaperAA
 
Joined: 19 Oct 2018

Re: Textures Flickering

Postby Graf Zahl » Tue Jan 01, 2019 2:08 am

This sounds more like a driver bug, if it only happens on the Intel GPU? Have you updated to the latest driver version?
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Graf Zahl
Lead GZDoom Developer
 
Joined: 19 Jul 2003
Location: Germany

Re: Textures Flickering

Postby ReaperAA » Tue Jan 01, 2019 4:33 am

It does seem like a intel GPU driver bug. I'll see if there are updates for the driver and then try. I will inform soon
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Joined: 19 Oct 2018

Re: Textures Flickering

Postby ReaperAA » Tue Jan 01, 2019 5:53 am

OK, so it seems like I could be trouble. I went here:
https://www.dell.com/support/home/pk/en ... op/drivers

And found out the latest version of Intel HD drivers supported by Inspiron 5570 is (23.20.16.4973 ,A05) which is already installed in my comp. I hope I am not out of luck here, am I?

And BTW how is Vulkan support coming up (Vulkan would mean I could finally use my AMD card).
ReaperAA
 
Joined: 19 Oct 2018

Re: Textures Flickering

Postby Graf Zahl » Tue Jan 01, 2019 6:33 am

ReaperAA wrote:And BTW how is Vulkan support coming up (Vulkan would mean I could finally use my AMD card).



Not much progress so far. The main problem is that before this becomes an option an alternative render path needs to be created that performs a lot less commands that need to be placed into the command buffer. With how things work currently it'd just be too slow.

Why can't you use OpenGL on your AMD anyway? If it supports Vulkan, OpenGL should be fine, and normally faster than the Intel.
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Graf Zahl
Lead GZDoom Developer
 
Joined: 19 Jul 2003
Location: Germany

Re: Textures Flickering

Postby ReaperAA » Tue Jan 01, 2019 7:14 am

Graf Zahl wrote:Why can't you use OpenGL on your AMD anyway? If it supports Vulkan, OpenGL should be fine, and normally faster than the Intel.


One would assume that the dedicated GPU would always perform better than the integrated GPU, but this is not my case. The AMD card performs better on DirectX/Vulkan games but when it comes to OpenGL, its performance is usually worse than the iGPU.

Its not just GZdoom that performs worse, I also get worse performance with Quakespasm, UT99's OpenGL renderer, EDGE, Yamagi Quake 2 etc.
ReaperAA
 
Joined: 19 Oct 2018

Re: Textures Flickering

Postby Graf Zahl » Tue Jan 01, 2019 7:21 am

That's a bit puzzling. I always assumed that AMD's drivers would be better than Intel's...
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Graf Zahl
Lead GZDoom Developer
 
Joined: 19 Jul 2003
Location: Germany

Re: Textures Flickering

Postby Rachael » Tue Jan 01, 2019 9:28 am

It once was that way.

To be fair, though, the GPU's themselves (sans drivers) are still faster, and not by any short mile either.
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Rachael
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Re: Textures Flickering

Postby ReaperAA » Tue Jan 01, 2019 10:34 am

Rachael wrote:To be fair, though, the GPU's themselves (sans drivers) are still faster, and not by any short mile either.


This. I should've just gone with a laptop with a Nvidia GPU (their opengl drivers are far better than AMD's crap drivers)
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Joined: 19 Oct 2018


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