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So I play Helldivers 2 and I noticed a bit of stutter when my refresh rate and fps cap is different. I already use display port cable, I have set kde adaptive sync to auto and turned on my monitor’s freesync. I also have added --adaptive-sync to the game’s launch option with gamescope on, but if my monitor’s refresh rate is 100hz and the game’s capped fps is 60 I could see the micro stutter.
The stutter would only be gone if I match the fps cap with the monitor’s refresh rate. I don’t mind lowering my refresh rate because I play at 60 fps anyway, but isn’t adaptive sync supposed to fix that? What’s weird is I tested with vrrtest and when I lower the bar test’s fps to 60 it’s still smooth unlike in the game
dwouu 2
For whatever reason I can’t cap my fps without enabling mangohud.
This is the command I use for Just Cause 3:
LD_PRELOAD="" PROTON_ENABLE_NVAPI=1 gamescope -w 1920 -h 1080 -r 120 --adaptive-sync --force-grab-cursor -- env MANGOHUD_CONFIG="fps_limit=120,fps_limit_method=early" MANGOHUD=1 %command%
Stripping out LD_PRELOAD, PROTON_ENABLE_NVAPI=1, fps_limit_method=early, while still capping fps I get:
gamescope -w 1920 -h 1080 -r 120 --adaptive-sync --force-grab-cursor -- env MANGOHUD_CONFIG="fps_limit=120" MANGOHUD=1 %command%
rshift+f12 to disable the overlay
Dylas 3
I don’t really get what you’re trying to show. Are you saying mangohud might be interfering with the adaptive sync?
dwouu 4
I had to enable mangohud to get fps capping to work. If you don’t have it enabled then that could be it 
specifying fps cap twice
Edit: forgot to mention I use GNOME
Dylas 5
Well I cap the game with its in game setting, and when I check with mangohud it runs at 60 so I assume the cap works, but I’ll try doing it like you said
Dylas 6
Ookay nevermind. I just got back home and now the adaptive sync works again. Turns out you just gotta restart the PC I guess.
Edit: but after playing for a while it stutters again because the refrrsh rate jumps back and forth between 100 and 60
mafdk 7
Adaptive sync on kde is a problematic thing. In some games when I move my mouse (or generally camera when I play with contoller) the refresh rate is bumped to max refresh rate of the monitor (165hz) what is causing flickering. In some games it’s working flawlessly in some not. It is lottery.
Dylas 8
Oh yeah I actually noticed mine does this too. When I first open Helldivers after restart the monitor’s refresh rate is stable at 60hz, but then after playing for a while it fluctuates between 100hz and 60hz creating stutter. I haven’t really checked if other game is like this too though
Is there a fix to this? Like maybe force it through driver/terminal or something rather than just from kde display setting?
Hey there currently suffering from a similar issue on my end. Have you found a fix yet?