laptop-mode无法激活

[anonymity]

察看error.log的时候发现如下错误：

代码： 全选

Laptop mode 
enabled, not active

强行激活laptop-mode的时候发现如下错误发生：

代码： 全选

[mza@mza ~]$ sudo laptop_mode force
Password: 
Laptop mode 
enabled, not active
Error for wireless request "Set Power Management" (8B2C) :
    SET failed on device eth0 ; Operation not supported.
Error for wireless request "Set Power Management" (8B2C) :
    SET failed on device lo ; Operation not supported.
Error for wireless request "Set Power Management" (8B2C) :
    SET failed on device eth0 ; Operation not supported.
Failed.

估计是将无线网卡错误的认为是eth0（这是我的有线网卡），但是我根据wiki的说法，没有发现有什么不对的地方。

附无线网卡信息如下：

代码： 全选

00:19.0 Ethernet controller: Intel Corporation 82577LM Gigabit Network Connection (rev 06)
	Subsystem: Lenovo Device 2153
	Flags: bus master, fast devsel, latency 0, IRQ 43
	Memory at f2500000 (32-bit, non-prefetchable) [size=128K]
	Memory at f2525000 (32-bit, non-prefetchable) [size=4K]
	I/O ports at 1820 [size=32]
	Capabilities: <access denied>
	Kernel driver in use: e1000e
	Kernel modules: e1000e