Comment # 39
on bug 110659
from Nicholas Kazlauskas
Disabling the compositor doesn't make a difference as far as stuttering goes for Hitman 2's DXVK - I don't see any commits in the log that are lock the connector and all the planes. I don't have Oblivion on my machine to test, but I tried running the DX9 version of Heaven under proton and I don't see stuttering or any gamma/color adjustment commits under that either. No issues with FreeSync when running it either from what I can tell with vsync both on/off. Those commits are definitely what's causing your stuttering, but I'm not sure what's actually creating them. My initial guess was something in the compatibility layer for DX9 games, but I don't see that on my setup. Is it only Oblivion that has this issue for you? I'm not sure how much of this can be a kernel level fix - I think we need to lock all the planes whenever gamma or color adjustments have been made and that probably includes the cursor plane as well. If the cursor plane is included that will block asynchronous cursor updates from occurring until the color adjustments have been done. This is why the cursor causes stuttering. A check could potentially be made to not lock all the planes for redundant color management commits, but I'm not sure if the color adjustments requested are redundant or not. It could be the case that the application is requesting different color adjustments every single time.
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