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[Solved] Constant Stuttering?

PostPosted: Wed Aug 07, 2019 8:59 am
by jakob
Hey there, long time no see.

Apologies for the rather anemic bug report -- I don't know if "stuttering" is even the best way to describe this behavior -- I just don't know what kind of diagnostics this would warrant.

I've been able to reproduce this on GZDoom 3.7.2, 4.1.3, and g4.2pre-324-g43041c21d-m. The issue is that the game freezes up every other second. This is most noticeable in the menu if I hold down one of the arrow keys, which I've attempted to record:

https://femto.pw/3p23.webm

I don't believe this is related to OpenGL or audio, as the issue persists with a null audio backend and the Doom software renderer.

I am running GuixSD on x86_64 Linux 5.1.3.

Log:
Spoiler:

Re: Constant Stuttering?

PostPosted: Tue Aug 13, 2019 7:20 am
by Talon1024
Could this be related to the issue you're having?

More importantly, does this only happen with GZDoom, or does it happen with other games as well?

Re: Constant Stuttering?

PostPosted: Tue Aug 13, 2019 7:37 am
by dpJudas
Keep in mind that even when using the software renderer the final result is still presented by OpenGL in GZDoom.

I just tried launching GZDoom here and I don't see any stuttering at all. That's on a Windows system though. Last time I tried GZDoom on Linux is ran quite terribly. It had a very high frame rate yet at the same time it didn't feel remotely smooth. At the time I figured it was probably my Linux distro or the nvidia driver acting up.

Re: Constant Stuttering?

PostPosted: Tue Aug 13, 2019 8:16 am
by drfrag
[Armchair developer mode on]
If only someone experienced on linux would go ahead and make an equivalent version of polybackend for SDL2, it should be pretty easy. :P
[Armchair developer mode off]

Re: Constant Stuttering?

PostPosted: Tue Aug 13, 2019 8:51 am
by dpJudas
You only have to implement 4 functions or so to support that branch on Linux. Nevertheless, it doesn't explain why OpenGL ran so poorly on my Linux machine last I tried it. I would have examined it closer if it was my primary platform for development, but I didn't have any clear indicator of what the problem was for me to fix it using joe.

Re: Constant Stuttering?

PostPosted: Sat Aug 17, 2019 6:06 am
by drfrag
I'd like to do it but i don't even use Linux, and i suspect this time copy-pasta won't cut it (from the old pure software SDL backend). :lol:

Re: Constant Stuttering?

PostPosted: Mon Aug 19, 2019 9:23 am
by jakob
Talon1024 wrote:Could this be related to the issue you're having?


Sadly, no.

Talon1024 wrote:More importantly, does this only happen with GZDoom, or does it happen with other games as well?


My apologies, I just tried running EDuke32 and ioquake3 and found that they have the same issue. I thought the problem would lie in GZDoom as other games were working fine just a few days ago, but that's not the case any longer. I'll mark this as solved, since it's apparent that this is not GZDoom-related.