尝试安装 laptop-mode-tools 时收到以下错误。
Xubuntu 14.10。内核 3.16.0-25-generic。
Setting up laptop-mode-tools (1.64-1ubuntu1) ...
sh: echo: I/O error
sh: echo: I/O error
Error for wireless request "Set Power Management" (8B2C) :
SET failed on device wlan0 ; Operation not supported.
Failed.
* Laptop mode
enabled, active
SETTING OF KERNEL PARAMETER FAILED: echo ondemand \> /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
SETTING OF KERNEL PARAMETER FAILED: echo ondemand \> /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor
我该如何修复这个问题并充分利用笔记本电脑模式工具？