Add some gamemode optimization configs to Wiki page

[PhoenixEmik]

It's good to make an optimization while running osu! in windowed mode on KDE, which can be added to https://github.com/NelloKudo/osu-winello/wiki/(Possibly)-optimize-your-game:-Gamemode
Adding the following configs to /etc/gamemode.ini will disable compositing automatically when launching osu! (or any other programs) via gamemode. And it will enable compositing after exiting osu!.

[custom]
start=kdialog --title 'Gamemode' --passivepopup 'Started' 2
start=qdbus org.kde.KWin /Compositor org.kde.kwin.Compositing.suspend
end=kdialog --title 'Gamemode' --passivepopup 'Stopped' 2
end=qdbus org.kde.KWin /Compositor org.kde.kwin.Compositing.resume

On some distros (eg. openSUSE Tumbleweed), use qdbus-qt5 instead of qdbus.

[custom]
start=kdialog --title 'Gamemode' --passivepopup 'Started' 2
start=qdbus-qt5 org.kde.KWin /Compositor org.kde.kwin.Compositing.suspend
end=kdialog --title 'Gamemode' --passivepopup 'Stopped' 2
end=qdbus-qt5 org.kde.KWin /Compositor org.kde.kwin.Compositing.resume

[NelloKudo]

I guess I could but I provide the same instructions for KDE at least in the Compositing page of the wiki, installing Autocomposer should do the same job.

Still providing more info for gamemode sounds good, I guess I’ll do it when I’m free ;)

[PhoenixEmik]

Autocomposer only works when a fullscreen application is running, it does nothing with windowed mode osu!. That's the reason that I use gamemode.
BTW disable desktop effects option in Lutris is broken so that doesn't help. lutris/lutris#2596

[tloc241]

omg, this post actually fixing my suttering issue while using gamemode 0_0
(didn't expect it to work bcs my DE is lxqt not kde)

[PhoenixEmik]

The qdbus method has been removed in KDE Plasma 6. And the popular KWin script Autocomposer is also broken now.
The hotkey for toggling compositing still works instead:

xdotool key shift+alt+F12   # the F has to be uppercase

[PhoenixEmik]

The qdbus method has been removed in KDE Plasma 6. And the popular KWin script Autocomposer is also broken now. The hotkey for toggling compositing still works instead:

xdotool key shift+alt+F12   # the F has to be uppercase

According to https://www.pling.com/p/1502826 , Autocomposer has been updated and works again now.

[whrvt]

newer builds of proton-osu should automatically set sensible niceness on osu! threads and rtprio for wineserver, if the user has the relevant permissions, negating the need for gamemode
composition is a different issue though, im not sure how that behaves by default

[PhoenixEmik]

The compositing causes cursor movement input lag even in full screen mode, which is similar to dwm.exe causing input lag in windowed mode on Windows OS.
This is not related to threads or rtprio but a window manager thing. I use gamemode to help me disable compositing automatically only.

[NelloKudo]

Well now that the new Autocomposer is finally out (and it now works on all X11 DEs) I'll just add a section for it in the wiki, along with the ones for niceness 🏃🏻