I recently upgraded from Ubuntu 14.04 LTS to Ubuntu 16.04 LTS. Had a few issues with phpmyadmin and MySQL-Server that I rectified. But whenever I restart the system, I lose internet connection. Although, WiFi is showing to be enabled, when seen in System Settings > Networks, it shows that all routers are out of range.
I tried stopping and then restarting WiFi using the WiFi button on my laptop. But it didn't work.
I also tried doing it from terminal as given in this answer. It also didn't work. Command as follows:
sudo service network-manager restart
Also, tried this answer. It didn't work either. Command as follows:
sudo systemctl restart NetworkManager.service
sudo lshw -class network is as follows:
*-network description: Ethernet interface product: RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:08:00.0 logical name: eth0 version: 07 serial: 14:58:d0:c1:1e:d0 size: 10Mbit/s capacity: 100Mbit/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 autonegotiation configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8106e-1_0.0.1 06/29/12 latency=0 link=no multicast=yes port=MII speed=10Mbit/s resources: irq:58 ioport:3000(size=256) memory:b2600000-b2600fff memory:b2400000-b2403fff *-network description: Wireless interface product: RT3290 Wireless 802.11n 1T/1R PCIe vendor: Ralink corp. physical id: 0 bus info: pci@0000:09:00.0 logical name: wlan0 version: 00 serial: b0:10:41:7f:5c:b5 width: 32 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=rt2800pci driverversion=3.13.0-77-generic firmware=0.37 ip=192.168.1.102 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn resources: irq:16 memory:b2510000-b251ffff