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But yeah, this is an odd one, back when I was using an Nvidia card (GTX 1060) with its proprietary driver, I would limit my framerate and turn off vsync, just to shave off a little input lag when playing games. The perceived frame pacing would be smooth and everything was fine. Tearing doesn't really bother me all that much.
When I later switched to an AMD GPU (RX 6700 XT), I noticed that whenever I'm not using vsync in games, I will get periodic microstutters. Doesn't matter if I'm limiting my framerate, or whether I'm logged into the X11 or Wayland session; the latter which has (some sort of?) forced vsync, I'm aware.
But anyway, they both get that stutter anyway, it's disabling vsync inside of the games that make it happen, regardless whether the game is a native or Windows build.
This was obviously not the case on my Nvidia hardware, so what gives? Anyone know what's different and if I can make it work the way I used to have it? That is, disabling vsync in games while keeping the frame-pacing smooth in conjunction with a framerate limiter.
Cheers!
Edit: Just tried gamescope, no dice :S In fact, it adds input lag.
Edit 2: 60hz, framerate itself doesn't drop, and it happens with both limited (66 is my usual limit) and unlimited framerates. Will be experimenting with Mesa's different present modes soon 😊
Last edited by ridge on 31 October 2022 at 6:17 am UTC
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switched to Rx 6750xt no screen tearing no issues so far. Performance is also high with all desktop effects are on. Ultra settings @1080p 60 stable fps at most games. ofc amdgpu opensource drivers are in use.
could you use gpu cpu info tools for debug. heat speed etc. so we can figure it out. have fun
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But that's on the GPU side of things, but what about their CPUs? Have you noticed anything suspicious? Do you put your PC in the sleep mode? Do you use VMware, is it working with AMD CPU? I'm asking because I was thinking about buying theirs since it cost less than Intel, but performance seems to be the same.
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Yeah of course, my bad :)
I've done some monitoring while playing before and nothing crazy, temps are fine (always under 60C on both CPU and GPU), usually set my GPU profile to "3D_FULL_SCREEN" when playing games, but they still stutter in the default boot state. Again, only with vsync set to off inside games.
With vsync, the GPU is absolutely fantastic. 1080p screen here as well, playing most of my games with high settings, a lot of them supersampled. Battlefield 5 at ultra with 200% resolution scale is absurdly good.
Other than that I'm not entirely sure what else you need to know, CPU and GPU usage is also fine, not too low and not maxed out (as expected from the older titles I play).
Nothing but happy with my AMD CPUs throughout the years! Though, and sorry, but I can't compare much to Intel since my last Intel processor was an i5-760 hahah.
I don't use sleep mode, I just turn my PC off when I go to sleep for the night. Sleep mode works fine though, I tested it once or twice, no issues.
VMware works swimmingly with my AMD CPU, both the Ryzen 7 7700X and Ryzen 5 5600H on my laptop. Always use VMware for Paint.net and Vegas Pro. If you're looking to go for one of the Ryzen 5000 CPUs (assuming that because of cost); go for it! If you're thinking about a Ryzen 7000 processor, I say wait a bit, the cost of entry when buying all new parts is way too high. Fantastic CPU though, and I don't regret getting it, I'm even aircooling it just fine. Was a fantastic upgrade from the Ryzen 5 2600.
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why a company reduces own cpus power while not loosing any money by that way ?? İ switched to amd 939 socket cpus and my journay has begun. these days amd cpu more efficient than intel in any way. Virtualizations+processing+rendering multitusking.
And back to point; it seems driver related issue. could you downgrade your open source drivers ? or install properiatary drivers ? and try
if they stutters too ?
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Aye, another one I missed, just gotten so used to it running with all my game shortcuts. I also set the GPU profile to 3D_FULL_SCREEN next to that. Gamemode doesn't do that for me, but I know that's an issue with RDNA2 that AMD needs to figure out.
Good catch, will experiment with this when I find the time.
Last edited by ridge on 30 October 2022 at 7:56 pm UTC
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I'm using RX 6800 XT and haven't noticed such kind of issue (KDE Wayland session), i.e. GPU is usually fully loaded with something like Cyberpunk 2077.
I also usually disable vsync in games and limit framerate (with libstrangle if game doesn't have a built in limiter) to monitor refresh rate - 1 (179 in my case).
I also have adaptive sync with LFC though, so that helps avoid tearing.
I don't enable any GPU overclocking settings - all defaults.
If you have some strange behavior you can reproduce consistently with something, you can report a bug I suppose to AMD drm bug tracker.
Last edited by Shmerl on 31 October 2022 at 5:47 am UTC
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The frame rate itself doesn't drop, oddly enough, it's just like it's an issue with the delivery of them. Extremely tiny stutters that are just big enough to notice, the pacing of the frames end up feeling weird, even if a frametime graph suggests otherwise. Even in X11 without compositing.
Normally I'd shrug this off with "well, vsync is off so I guess that's why frames are being delivered weird", but I'm so curious as to how my Nvidia card managed to deliver smooth, non-stuttery presentation without vsync 😁
Edit: In my case, just a good old 60hz monitor, no freesync
Last edited by ridge on 31 October 2022 at 5:49 am UTC
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You can use some HUD graph like Mesa Vulkan overlay to observe the value of framerate and frametime and log the above and then look into some patterns.
Also, with 60 Hz, make sure you don't limit it to 60 fps but to 59. Unlike vsync logic, limiting on the edge of refresh rate will cause some breaking. So limit it to minus one.
Last edited by Shmerl on 31 October 2022 at 5:53 am UTC
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Is Mesa's vulkan overlay any different than MangoHud's graphs? I'll put it on my todo, cheers.