Raspberry Pi service to switch to ondemand cpu governor (unless shift key is pressed) during boot up.
apt install triggerhappy
wget -O /etc/init.d/cpu-governor https://github.com/Re4son/RPi-Tweaks/raw/master/cpu-governor/cpu-governor
chmod +x /etc/init.d/cpu-governor
wget -O /lib/systemd/system/cpu-govenor.service https://github.com/Re4son/RPi-Tweaks/raw/master/cpu-governor/cpu-governor.service
systemctl enable cpu-govenor && systemctl start cpu-governor
I'll write a tool similar to raspi-config, which can be used to change the cpu governor parameters