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lspci -nnk | grep 0280 -A2

04:00.0 Network controller [0280]: Intel Corporation Centrino Wireless-N 2230 [8086:0888] (rev c4)
    Subsystem: Intel Corporation Centrino Wireless-N 2230 BGN [8086:4262]
    Kernel driver in use: iwlwifi

 sudo lshw -class network

  *-network               
       description: Wireless interface
       product: Centrino Wireless-N 2230
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:04:00.0
       logical name: wlp4s0
       version: c4
       serial: 68:17:29:49:a9:8a
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwlwifi driverversion=4.9.4-040904-generic firmware=18.168.6.1 ip=192.168.43.42 latency=0 link=yes multicast=yes wireless=IEEE 802.11
       resources: irq:30 memory:f2500000-f2501fff
  *-network
       description: Ethernet interface
       product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:05:00.0
       logical name: enp5s0
       version: 07
       serial: 28:d2:44:15:f7:93
       size: 10Mbit/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=half firmware=rtl8168e-3_0.0.4 03/27/12 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
       resources: irq:26 ioport:2000(size=256) memory:f1404000-f1404fff memory:f1400000-f1403fff

I have already tried solutions from below thread but they are not working for me.

Wifi doesn't work after suspend after 16.04 upgrade

16.04 LTS wifi connection issues

https://ubuntuforums.org/showthread.php?t=2004690

Please, advice. Thanks.

Community
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Tauqeer
  • 11
  • 1

1 Answers1

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In my case with a lenovo E540 whenever a usb port was used on wakeup the wifi would not work but when no USB was plugged in the wifi was waking up fine

You might want to try unplugging usb ports on wakeup and plug them in a few seconds

I realize this is just a workaround or it can be used to find the source of the problem.

GiorgosK
  • 1,066