Wifi suddenly stopped working

Ask Fedora
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1

As of yesterday, I left my PC on standby, took a nap, and when I woke back up and turned it back on, internet connection stopped working.

I tried verifying whether it was an hardware issue, which it wasn’t.

PC is connected via ethernet straight to the router, it is connected via LAN to the network but it is the only device under the network unable to communicate with WAN. I tried also moving the ethernet cable into a USB adapter and connecting it to a 3.0 port to no avail.

curl returns in 0ms, pinging 8.8.8.8 does nothing, stopping firewalld is useless and trace returns an empty trace.

Curiously enough, connecting the PC to my phone and using it for Tethering works fine.

3

My PC doesn’t have an integrated wifi card, it cannot go in airplane mode.
I have rebooted my PC several times.

The NetworkManager 00-wifi-powersave.conf file didn’t even exist before I opened it with nano, is that normal?
Either way I created it and copied the contents you sent.

4

If rebooting your PC doesn’t help the first time, doing it again is a waste of time. Try traceroute 8.8.8.8 to see how far pinging gets before failing.

5

As I said, traceroute fails on the way to my router, “Network is unreachable” is the error. It cannot even reach the gateway IP.

I noticed that when I reboot my router, my PC connects for around a minute. I tried doing route within that minute works as expected.

Again, my PC is the only device in the network that is having these issues.

6

Hi FallBack…
Try a complete shutdown to power off and then unplug the machine from the network and the power supply, wait about 30 seconds, plug everything back in and power up. Some network cards do not behave well when the machine returns from sleep or hibernate mode.

Once the machine is back up:

  1. open a terminal
  2. ifconfig — do you see an interface with an IP address? (usually in the 192.168.xx.xx or 10.xx.xx.xx range) – IF NOT you are not getting an IP address from your router/gateway, bad cable/connection between computer and router or router is having an issue
  3. ip route show default — can you ping the address after “via”? — YES, connection between router and computer is good
  4. nslookup google.com — did this return and address? – NO, you have a DNS problem, check the configuration on the router
  5. ping the address returned by nslookup for google.com — ping returning good response? — NO, check with your ISP … (you should also be able to ping 8.8.8.8)
7

The issue happens with motherboard Ethernet and a separate USB Ethernet adapter?

I might recommend checking the cable and also switching the LAN port it’s in on the router.

8

Then you should update the title, as this doesn’t have anything to do with WiFi.

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