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I have a strange issue about Wifi connectivity. My home has two wifi modems, F1 and F2 for each floor. My Ubuntu version was 18.04 and I want to upgrade to 20.04, but have to upgrade to 19.10 first. Then when I finally upgraded to 20.04, I cannot connect to F2 wifi, it keeps connecting but never success. Connecting to F1 works well.

All I remember is when I was at Ubuntu 19.10, I use the F2 wifi to run command for upgrading to 20.04. Hence, when I unplug the F2 wifi modem and replug, my laptop can connect to it but when I disconnect it or restart the computer, the issue persists.

If you need any information for investigation, just tell me. Thank you.

Trương Minh Triết
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  • Hi! I would add these related links, can hopefully be of help: https://askubuntu.com/questions/425155/my-wireless-wifi-connection-does-not-work-what-information-is-needed-to-diagnos And, https://askubuntu.com/questions/1278694/wifi-connects-but-pages-dont-load/1281120#1281120 //Best wishes – William Martens Oct 10 '20 at 14:10
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    Thank you for your sharing. I may have resolved it by myself or the recent Ubuntu updates has fixed it. I will refer to your link when necessary. – Trương Minh Triết Oct 11 '20 at 16:03
  • I tried all the following solutions, but none worked for me except the one posted here: https://askubuntu.com/a/1277071/35310 I'm using Ubuntu 22.04.2 LTS – Rishi Kulshreshtha Apr 07 '23 at 03:00

2 Answers2

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Network logs should be sent to /var/log/syslog

You can perhaps try monitoring the log using:

tail -f /var/log/syslog

Then attempting to connect again.

Optionally you can also share the log (tail -n40 /var/log/syslog) and perhaps someone can help further.

Ricky Hewitt
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On router settings (go to 192.168.0.1 or your router address):

Go through the setup wizard and also changed authentication method to WPA2-PSK.

Dlink administration SCreen .

On Ubuntu 20.04:

Assume that the wireless network interface is wlp5s0.

Edit file:

sudo vim /etc/network/interfaces

Add following lines:

auto wlp5s0
iface wlan0 inet static

Save and close the file, then:

ifconfig wlp5s0 down
ifconfig wlp5s0 up
Trương Minh Triết
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  • iface wlan0 inet static won't work without setting a static address, etc. And what is wlan0 if the interface is wlp5s0? So it is a crap answer. – Pilot6 Apr 25 '20 at 19:21
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    @Pilot6 the crap maybe was unnecessarily.. It can't be easy all the time to know each little detail, (Just wanted to add that) Not to sound offensive;Sorry If I did: //Regards – William Martens Oct 11 '20 at 17:04