Running Archlinux with up-to-date packages (git mesa and xf86-video-ati), I have been experiencing stutters (frame drops *including* the cursor) when running Diablo 3 via wine in a wayland gnome session. If I run the game via classic xorg session, I have no issues. I verified that using modesetting in xorg worked fine as well. Most notable is the fact that I do *not* have these issues on my nouveau-running laptop with the same set of software. I am running wine-staging with Gallium nine patches. I have absolutely no idea how to debug the issue, what information may help, or where exactly the bug should be reported, so ideas are welcome!
Major thing I forgot to mention in the initial report: I verified that sway also had the issue, which I believes eliminates gnome/mutter as the culprit.
Nick reported on IRC that this doesn't happen with weston, so it seems to be gnome-shell/sway compositor issues.
FWIW, I did some more testing, and there does seem to be an issue in Xwayland, see bug 99702. I'm not sure if that explains all the issues you're seeing though.
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