Comment 11 for bug 1853830

Here is the test case I've used; I'm using glmark2 as "the game".

    sudo apt install gamemode glmark2

Reboot.

Log in and check that gamemode is not running by default:

    ps -efH | grep gamemode | grep -v grep

Check what CPU `scaling_governor` is enabled by default, it should report `powersave`

    cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
    powersave
    powersave
    powersave
    powersave

Invoke gamemode.

    gamemoderun glmark2

This should have activated `gamemoded`, check the process has been started:

    ps -efH | grep gamemode | grep -v grep

While the game is running check what CPU `scaling_governor` is active, it should report `performance`.

    cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
    performance
    performance
    performance
    performance

Quit the game and check the CPU `scaling_governor` again, it should now report `powersave`.

    cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
    powersave
    powersave
    powersave
    powersave

I have also used the GameMode extension for GNOME and it correctly reports when gamemode has been activated.

  * https://github.com/gicmo/gamemode-extension