Great Experiance with Ubuntu 11.10 and ThinkPad E420
I will share my some experience with Ubuntu 11.10 and ThinkPad E420 (1141 DTQ). Previously I installed Ubuntu 10.04 LTS on my E420. But there were many problems like wifi, Bluetooth connection etc. So I searched some Ubuntu versions which are compatible with ThinkPad E420 series. I got a solution that 11.10 version is certified by Ubuntu for E420 model (http://www.ubuntu.com/certification/hardware/201103-7425 ). Then I installed 11.10 iso version from site and make my pendrive bootable following the steps in: http://www.pendrivelinux.com/universal-usb-installer-easy-as-1-2-3/ . Then I installed on my Laptop.
Everything I experienced OK, except WiFi. I checked the wifi driver version and vendor by the below command:
$ lspci | grep -i wifi
08:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter (rev 01)
08:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter (rev 01)
and realize that it was a Realtek adapter. I lists all the connection using:
$ rfkill list
0: tpacpi_bluetooth_sw: Bluetooth
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: yes
Hard blocked: no
3: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
0: tpacpi_bluetooth_sw: Bluetooth
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: yes
Hard blocked: no
3: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
Then I did:
sudo su echo "blacklist acer-wmi" >> /etc/modprobe.d/blacklist.conf
Now notice the entry at the last line of the file: gedit /etc/rc.local
and
sudo rmmod -f acer-wmi sudo rfkill unblock all rfkill list all
this solved my problem and successfully listed all the wireless network surrounding. This problem was due to blacklisted acer-wmi and had to put it into blacklist.conf
Happy Ubuntu-ing. :~:
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