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tildearrow / kwin-lowlatency

archived - X11 full-screen unredirection and lots'a settings for KWin
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FF scrolling : smooth at 144 Hz / slightly jerky at 120 Hz ? #43

Open bidinou opened 5 years ago

bidinou commented 5 years ago

Hi !

I own a 144 Hz monitor with an NVIDIA card (Neon distro), 435.x drivers. I noticed that, when switching to 120 Hz (which I thought was relevant for instance for some emulators that are smooth at a multiple of 60 Hz and not at 144 Hz...), the FF scrolling was turning slightly jerky while it's absolutely butter smooth at 144 Hz.

Is that expected ? I find it a little surprising but there might be an explanation ? Well, most people would find it acceptable as it's a little subtle.

(OT : I noticed also that when switching my monitor manually to a different frequency -- not through the control panel but with the monitor buttons --, the screen turned black -- it doesn't happen under Mutter / Muffin for instance. I'm not sure under the vanilla kwin, I should try. Same when enabling Freesync).

tildearrow commented 5 years ago

If typing "xrandr" or restarting the compositor works around the issue, then this is related to/duplicate of #34.