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ArchLinux螢幕亮度調節

  安裝好ArchLinux後會出現螢幕變暗的情況,解決方法:

sodo su
echo 100 >/sys/class/backlight/xxxxx/brightness # 螢幕亮度調到100
cat /sys/class/backlight/xxxxx/max_brightness # 檢視螢幕亮度最大值

  xxxxx為backlight目錄下的檔名字

1 、手動寫一個rc-local.service 檔案

nano /usr/lib/systemd/system/rc-local.service
[Unit]
Description="/etc/rc.local Compatibility" 

[Service]
Type=forking
ExecStart=/etc/rc.local start
TimeoutSec=0
StandardInput=tty
RemainAfterExit=yes
SysVStartPriority=99

[Install]
WantedBy=multi-user.target

  寫完後Ctrl+o儲存

2、啟動指令碼

systemctl enable rc-local.service

 3、建立啟動檔案rc.local:

chmod +x /etc/rc.local
vim /etc/rc.local 

  輸入開機執行的操作: 

#!/bin/sh
echo 100 > /sys/class/backlight/radeon_bl0/brightness
exit 0