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Please understand the problem before blindly flagging this question as a duplicate

I installed Ubuntu a few months ago and network connection speed was at full bandwidth. However, I have been experiencing very strange network speed drops recently.

Problem Description

Let's say network's bandwith is 20Mb/s. When I first boot up the computer, network is at full bandwidth. After a few minutes of usage, the network speed starts to decrease gradually until it reaches < 0.5Mb/s... Also the decrease is not constant, but the speed keeps spiking and falling back again.

Some weird things I noticed

  • The network speed doesn't start decreasing at a fixed moment nor for a fixed period of time.
  • If I turn Wifi Off and On, network speed gets better a little bit (not full bandwidth) then it continues to decrease again after a few minutes.

Some assumptions based on the problem description

  • My hardware is not damaged because I can dual boot with windows where network speed is perfect
  • The issue is most likely caused by a faulty program or misconfiguration (probably with network adapter since the problem doesnt occur with usb connection) because I was not experiencing this issue before on the same machine and on the same ubuntu version.

HOWEVER I could not investigate more in the issue. It seems too vague and weird that I didn't know where to start troubleshooting. Feel free to ask me for any logs.

Some logs sudo journalctl -b 0 -u NetworkManager

May 05 21:08:10 LAPTOP-HP NetworkManager[14226]: <warn>  [1651781290.6156] sup-iface[0x562aba313a00,wlo1]: connection disconnected (reason -4)
May 05 21:08:10 LAPTOP-HP NetworkManager[14226]: <info>  [1651781290.6443] device (wlo1): supplicant interface state: completed -> disconnect>
May 05 21:08:11 LAPTOP-HP NetworkManager[14226]: <info>  [1651781291.2362] device (wlo1): supplicant interface state: disconnected -> scanning
May 05 21:08:15 LAPTOP-HP NetworkManager[14226]: <info>  [1651781295.7832] device (wlo1): supplicant interface state: scanning -> authenticat>
May 05 21:08:15 LAPTOP-HP NetworkManager[14226]: <info>  [1651781295.7976] device (wlo1): supplicant interface state: authenticating -> assoc>
May 05 21:08:15 LAPTOP-HP NetworkManager[14226]: <info>  [1651781295.8087] device (wlo1): supplicant interface state: associating -> associat>
May 05 21:08:15 LAPTOP-HP NetworkManager[14226]: <info>  [1651781295.8187] device (wlo1): supplicant interface state: associated -> 4-way han>
May 05 21:08:15 LAPTOP-HP NetworkManager[14226]: <info>  [1651781295.8714] device (wlo1): supplicant interface state: 4-way handshake -> comp>

These logs are gettings repeated every 1~2 minutes

Amin Guermazi
  • 113

0 Answers0