Feral's GameMode 1.6 Released For Optimizing The Linux Gaming Experience

[F.Ultra]

Are you sure, what is the name of the package?

I cannot find it (on Kubuntu 20.04) and on Github I see instructions only for building it.

just "gamemode".

f.ultra@ubuntu:~$ apt-cache search gamemode
gamemode - Optimise Linux system performance on demand
libgamemode-dev - Optimise Linux system performance on demand (dev files)
libgamemode0 - Optimise Linux system performance on demand (libraries)
libgamemodeauto-dev - Automatically optimise system performance on demand (dev files)
libgamemodeauto0 - Automatically optimise Linux system performance on demand
gnome-shell-extension-gamemode - gnome-shell extension that monitors the current status of gamemode
redeclipse - free, casual arena shooter
f.ultra@ubuntu:~$ apt-cache policy gamemode
gamemode:
Installerad: 1.5.1-0ubuntu3.1
Kandidat: 1.5.1-0ubuntu3.1
Versionstabell:
*** 1.5.1-0ubuntu3.1 500
500 http://se.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages
100 /var/lib/dpkg/status
1.5.1-0ubuntu3 500
500 http://se.archive.ubuntu.com/ubuntu focal/main amd64 Packages
f.ultra@ubuntu:~$