Steam Deck

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Screen Tearing and PWM? (self.steamdeck)

submitted 1 year ago by cianmor to c/[email protected]

12 comments fedilink hide all child comments

Does the Steam Deck use PWM for the screen? Does the screen flicker?
While gaming, is there some kind of screen tearing or is there some kind of VRR/Freesync being used? Otherwise, what settings do you use to avoid screen tearing (FPS locking, etc.)?

Thanks!

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[–] [email protected] 3 points 1 year ago* (last edited 1 year ago) (1 children)

Yes it flickers, more noticeable when setting lower frequencies, it personally doesn't bothers me at all, but I never had that problem with other devices neither. I think some people couldn't handle it. Ad of course apart from personal sensitivity there is always the brightness and illumination of the place you are that would affect how visible it is

About the tearing, first of all due the screen being a vertical one any tearing would be vertical. Then if using SteamOS due to using Wayland until recently it was impossible as that forced always VSync. But now there is a new option to allow tearing, I haven't test it. There isn't VRR, well for the device screen, I think VRR worked for monitors supporting it connected to it but not 100% sure.

[–] cianmor 1 points 1 year ago (2 children)

Thanks. Does it also flicker at 100% brightness?

So, vsync should eliminate screen tearing m, at the cost of performance (lower fps when enabled)?

[–] scutiger 2 points 1 year ago

Vsync synchronizes the framerate with the refresh rate, no matter how fast your GPU can render them. The GPU can typically render the frames much faster than the 60 FPS that the screen allows, so instead of loading a frame that just happened, your screen may be loading a frame that happened 1/60th of a second ago. The advantage is that the screen always receives a full frame so you don't get any tearing. The downside is that your inputs may appear delayed by a frame or two.

[–] [email protected] 1 points 1 year ago* (last edited 1 year ago)

I do not know for me is not noticeable...but maybe is there and I do not see it.

And the VSync the most annoying thing usually is that well, it adds input lag. Lower fps I do not think so.... I mean of course it will be capped to the screen frequency, so 60 max.