[Bug 110659] pageflipping seems to cause jittering on mouse input when running Hitman 2 in Wine/DXVK with amdgpu.dc=1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110659

--- Comment #81 from Andrew Eikum <aeikum at codeweavers.com> ---
(In reply to Nicholas Kazlauskas from comment #74)
> (In reply to Michel Dänzer from comment #73)
> > Looks like some client repeatedly calls XForceScreenSaver (probably to
> > prevent the monitors from blanking), which results in the DPMS property
> > getting re-set over and over. Nicholas, maybe the kernel could ignore such
> > no-op property "updates"?
> 
> Even if it's no-op update it's still going to be locking the connector and
> potentially blocking other commits from occurring so ideally the client
> userspace wouldn't be dong this.
> 

I've submitted a patch to Wine to throttle our calls to XResetScreenSaver to
once every five seconds: https://source.winehq.org/patches/data/169958

However, I'd argue our previous behavior isn't obviously wrong. What we were
doing was calling XResetScreenSaver each time we received user input on a
joystick in order to delay the screensaver coming up despite no keyboard/mouse
input. It's not obvious that this behavior was incorrect. Are you sure you
shouldn't be able to handle this behavior from a client?

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