CPU frequency selector by dmenu on Ubuntu

由於目前改用 awesome window manager 取代了 GNOME Desktop , 所以很多"好用"的 Panel Applets 不能使用了.

尤其是 cpufreq-selector 這個對 Laptop 很常用的 applet 不能用, 實在很可惜.
所以, 利用 dmenu (part of dwm-tools) 來刻一個簡單的 cpufreq-selector.


ScreenShot:

安裝 dmenu:

sudo apt-get install dwm-tools

撰寫 cpufreq script:
或可以由此下載.

#!/bin/sh                                                                                       
cur_governor=`cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor`
avail_governors=`cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors`

# using dmenu to select cpu governor
cpu_governor=$(for i in $avail_governors ;do

    if [ $cur_governor = $i ]; then
       echo "[$i]"
    else
       echo $i
    fi
done | dmenu -p "Select CPU Governor: "| sed "s/\[\([a-z|A-Z]*\)\]/\1/g")

if [ -n "$cpu_governor" ]; then
    for cpu in `ls -d /sys/devices/system/cpu/cpu?` ; do
        cpu_num=`basename $cpu | sed "s/cpu//"`
        cpufreq-selector -c $cpu_num -g $cpu_governor
    done
fi

關閉 cpufreq-selector 每次必需輸入密碼(如果你覺得煩):
修改 /usr/share/polkit-1/actions/org.gnome.cpufreqselector.policy

gksudo gedit /usr/share/polkit-1/actions/org.gnome.cpufreqselector.policy

找到原始:

    <defaults> 
      <allow_inactive>no</allow_inactive> 
      <allow_active>auth_admin_keep</allow_active> 
    </defaults> 

修改成:

    <defaults> 
      <allow_inactive>no</allow_inactive> 
      <allow_active>yes</allow_active> 
    </defaults>