networking - Ubuntu 16.04 - cannot re-connect the WiFi network after connection changes - Ask Ubuntu


say ubuntu laptop connected wifi network. reason had restart wireless router. after router rebooted successfully, wifi network list not update , when log out , in system again, network can set automatically. same thing happen when turn off network function on ubuntu , try reconnect. does. 1 can help?

the system x64_86 , run on asus - k550l laptop. think problem arose when installed system ( cleared disk ubuntu :) ) it's not unacceptable annoying me sometimes.. appreciated!

after running

lspci -nn

gives following information:

00:00.0 host bridge [0600]: intel corporation haswell-ult dram controller [8086:0a04] (rev 09) 00:02.0 vga compatible controller [0300]: intel corporation haswell-ult integrated graphics controller [8086:0a16] (rev 09) 00:03.0 audio device [0403]: intel corporation haswell-ult hd audio controller [8086:0a0c] (rev 09) 00:04.0 signal processing controller [1180]: intel corporation device [8086:0a03] (rev 09) 00:14.0 usb controller [0c03]: intel corporation 8 series usb xhci hc [8086:9c31] (rev 04) 00:16.0 communication controller [0780]: intel corporation 8 series heci #0 [8086:9c3a] (rev 04) 00:1b.0 audio device [0403]: intel corporation 8 series hd audio controller [8086:9c20] (rev 04) 00:1c.0 pci bridge [0604]: intel corporation 8 series pci express root port 1 [8086:9c10] (rev e4) 00:1c.2 pci bridge [0604]: intel corporation 8 series pci express root port 3 [8086:9c14] (rev e4) 00:1c.3 pci bridge [0604]: intel corporation 8 series pci express root port 4 [8086:9c16] (rev e4) 00:1c.4 pci bridge [0604]: intel corporation 8 series pci express root port 5 [8086:9c18] (rev e4) 00:1d.0 usb controller [0c03]: intel corporation 8 series usb ehci #1 [8086:9c26] (rev 04) 00:1f.0 isa bridge [0601]: intel corporation 8 series lpc controller [8086:9c43] (rev 04) 00:1f.2 sata controller [0106]: intel corporation 8 series sata controller 1 [ahci mode] [8086:9c03] (rev 04) 00:1f.3 smbus [0c05]: intel corporation 8 series smbus controller [8086:9c22] (rev 04) 00:1f.6 signal processing controller [1180]: intel corporation 8 series thermal [8086:9c24] (rev 04) 02:00.0 unassigned class [ff00]: realtek semiconductor co., ltd. device [10ec:5287] (rev 01) 02:00.1 ethernet controller [0200]: realtek semiconductor co., ltd. rtl8111/8168/8411 pci express gigabit ethernet controller [10ec:8168] (rev 12) 03:00.0 network controller [0280]: qualcomm atheros ar9485 wireless network adapter [168c:0032] (rev 01) 04:00.0 3d controller [0302]: nvidia corporation gf117m [geforce 610m/710m/810m/820m / gt 620m/625m/630m/720m] [10de:1140] (rev a1)


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