ThinkPad t420 centos Wireless Network Configuration

1) check which wireless network card
. 0 network controller: RealTek semiconduco., Ltd. rtl8188ce 802.11b/G/n WiFi adapter (Rev 01)
Rtl8188ce and rtl8192ce shared the same driver
2) download and install driver
Download compat wirless driver

Http://linuxwireless.org/en/users/Download/stable#compat-wireless_3.3_stable_releases

This version is OK: compat-wireless-3.3-2-n.tar.bz2
$ Tar xjf compat-wireless-3.3-2-n.tar.bz2
$ CD/compat-wireless-3.3-2-n
$ Su
#./Scripts/driver-select rtlwifi
# Make
# Make install

# Reboot
3) need the firmwire
Then find error,
# Dmesg | grep rtl8192ce

Rtl8192ce. 0: firmware: requesting rtlwifi/rtl8192cfw. Bin
Rtl8192ce: rtl92c_init_sw_vars (): <0-0> failed to request firmware!
Rtlwifi: rtl_pci_probe (): <0-0> can't init_sw_vars.

4) download the driver from the vendor

Http://www.realtek.com/downloads/downloadsView.aspx? Langid = 1 & pnid = 48 & pfid = 48 & level = 5 & conn = 4 & downtypeid = 3 & getdown = false & downloads = true # rtl8188

CE

The version: 92ce_se_de_linux_mac80211_0005.1230.2011.tar.gz
$ Tar xzf 92ce_se_de_linux_mac80211_0005.1230.2011.tar.gz
$ CP rtl_92ce_92se_92de_linux_mac80211_0005.1230.2011/firmware/rtlwifi/lib/firmware

# Rmmod rtl8192ce
# Modprobe rtl8192ce
# Dmesg | grep rtl8192ce

5) The driver work, and pop a message said: The wirelees work now !!!

6) ifconfig wlan0 up