# Sway 电源自动管理配置

## 功能说明

实现 Sway 环境下根据电源状态自动切换性能模式：
- **插电源**：`throughput-performance` (高性能)
- **用电池**：`laptop-battery-powersave` (节能降频)

仅在 Sway 会话生效，不影响 Plasma 的电源管理。

## 实现方式

### 1. 自动切换脚本
`/usr/local/bin/tuned-auto-switch.sh`
```bash
#!/bin/bash
# Only run if Sway is running
pgrep -x sway > /dev/null || exit 0

if [ "$(cat /sys/class/power_supply/AC*/online)" = "1" ]; then
    tuned-adm profile throughput-performance
else
    tuned-adm profile laptop-battery-powersave
fi
```

### 2. Systemd 服务
`/etc/systemd/system/tuned-power-switch@.service`
```ini
[Unit]
Description=Switch tuned profile on power change

[Service]
Type=oneshot
ExecStart=/usr/local/bin/tuned-auto-switch.sh
```

### 3. Udev 规则
`/etc/udev/rules.d/99-tuned-power.rules`
```
SUBSYSTEM=="power_supply", ENV{POWER_SUPPLY_ONLINE}=="0", TAG+="systemd", ENV{SYSTEMD_WANTS}="tuned-power-switch@$kernel.service"
SUBSYSTEM=="power_supply", ENV{POWER_SUPPLY_ONLINE}=="1", TAG+="systemd", ENV{SYSTEMD_WANTS}="tuned-power-switch@$kernel.service"
```

## 验证

查看当前配置：
```bash
tuned-adm active
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
```

监控切换日志：
```bash
journalctl -f
```