1. 先执行GRUB禁用intel_pstate的配置：脚本依赖 acpi-cpufreq 驱动，所以重装系统后，必须先执行GRUB配置，禁用intel_pstate，重启系统后，再执行这个脚本，否则驱动不对，脚本不生效

cat > /etc/default/grub << 'EOF'
GRUB_DEFAULT=0
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="iStoreNextD"
GRUB_CMDLINE_LINUX_DEFAULT="console=ttyS0 intel_pstate=disable"
GRUB_CMDLINE_LINUX=""
EOF

update-grub
reboot

2.重启系统后，再执行下面的 schedutil 一键脚本，才算完整流程。(功率根据自己cpu改，当前CPU 1265LV3)

# 清理旧服务

systemctl stop cpu-powersave.service

systemctl disable cpu-powersave.service

rm -f /etc/systemd/system/cpu-powersave.service

systemctl daemon-reload

# 创建schedutil守护脚本

cat > /usr/local/bin/cpu-schedutil-lock.sh << 'EOF'
#!/bin/bash
while true; do
    for cpu in /sys/devices/system/cpu/cpu[0-9]*; do
        echo "schedutil" > "$cpu/cpufreq/scaling_governor"
        echo 800000 > "$cpu/cpufreq/scaling_min_freq"
        echo 2500000 > "$cpu/cpufreq/scaling_max_freq"
    done
    sleep 10
done
EOF

chmod +x /usr/local/bin/cpu-schedutil-lock.sh

# 创建服务

cat > /etc/systemd/system/cpu-schedutil.service << 'EOF'
[Unit]
Description=CPU Schedutil Governor Lock (Dynamic Power Saving)
After=local-fs.target multi-user.target

[Service]
Type=simple
ExecStart=/usr/local/bin/cpu-schedutil-lock.sh
Restart=always
RestartSec=5
Nice=-20
IOSchedulingClass=realtime
User=root
Group=root
TimeoutStartSec=30

[Install]
WantedBy=multi-user.target
EOF

# 启用服务

systemctl daemon-reload

systemctl enable --now cpu-schedutil.service

# 验证

echo "当前CPU调度器："
cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
echo "当前CPU频率（待机）："
cat /proc/cpuinfo | grep "cpu MHz"

3.安装stress（可选，用于满载测试）：

重装系统后， stress 工具会被清除，如需测试满载性能用stress工具给CPU加满载（如果没装，先执行 apt install -y stress）

stress --cpu $(nproc) --timeout 60

然后用另一个终端观察:

echo "当前CPU频率（待机)"
cat /proc/cpuinfo | grep "cpu MHz"