Run as root
cat <<EOF> /etc/dconf/profile/user
user-db:user
system-db:local
EOF
mkdir -p /etc/dconf/db/local.d/
cat <<EOF> /etc/dconf/db/local.d/00-hidpi
[org/gnome/mutter]
experimental-features=['scale-monitor-framebuffer']
EOF
mkdir -p /etc/dconf/db/locks
cat <<EOF> /etc/dconf/db/locks/hidpi
/org/gnome/mutter/experimental-features
EOF
dconf update && reboot