I have upgraded my ubuntu to 12.04 from 10.04. On my ubuntu 10.04 I was successfully using wifi but in latest version its disabled.
umair@umair-desktop:~$ rfkill list
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
1: ideapad_wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
2: ideapad_bluetooth: Bluetooth
Soft blocked: no
Hard blocked: no
3: phy0: Wireless LAN
Soft blocked: no
Hard blocked: yes
I have checked fn+f5 , its on at this moment and when i press it again following state changes
3: phy0: Wireless LAN`
Soft blocked: yes
Some more details
umair@umair-desktop:~$ sudo lshw -class network
[sudo] password for umair:
*-network DISABLED
description: Wireless interface
product: AR9285 Wireless Network Adapter (PCI-Express)
vendor: Atheros Communications Inc.
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlan0
version: 01
serial: 44:6d:57:9f:61:19
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=ath9k driverversion=3.2.0-29-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11bgn
resources: irq:17 memory:d0500000-d050ffff
*-network
description: Ethernet interface
product: RTL8111/8168B PCI Express Gigabit Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:03:00.0
logical name: eth0
version: 06
serial: f0:de:f1:f1:34:9f
size: 100Mbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl_nic/rtl8168e-2.fw ip=192.168.1.3 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s
resources: irq:41 ioport:2000(size=256) memory:d0404000-d0404fff memory:d0400000-d0403fff
