The system works perfectly fine with wired connection. It has problems accessing wifi at my office. However my wifi at my home seems to work fine.
I have installed wicd and tried many alternatives but somehow it does not help.
Pasted below is dump from lshw for wireless.
*-network description: Wireless interface product: AR9485 Wireless Network Adapter vendor: Qualcomm Atheros physical id: 0 bus info: pci@0000:03:00.0 logical name: wlan0 version: 01 serial: 94:db:c9:49:63:68 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list rom ethernet physical wireless configuration: broadcast=yes driver=ath9k driverversion=3.12.0-7-generic firmware=N/A ip=192.168.0.4 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn resources: irq:17 memory:f7900000-f797ffff memory:f7980000-f798ffff