Comment # 11 on bug 106175 from tempel.julian@gmail.com

I noticed that this issue also exists apart from Xorg compositors.
When I run Serious Sam: Fusion (both OpenGL and Vulkan) in fullscreen (no Xorg
compositor enabled in the background), the mouse cursor (hardware cursor) in
the main menu can be moved without stuttering. But as soon as I enable vsync in
the game, its movement becomes stuttery. Again no problem with amdgpu.dc=0.