Internet disconnects randomly on Ubuntu and Windows

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I've had this issue for a few months now. My desktop PC disconnects randomly up to 4 times a day for about 10 to 90 seconds. Here's a list of things I tried:

  • use a different ethernet cable
  • update network drivers
  • get a new router
  • use a dedicated network card (ethernet controller: Aquantia AQC107)
  • manually set the DNS server (1.1.1.1, 1.0.0.1)
  • update UEFI BIOS
  • numerous other fixes (I can't remember every little thing I tried honestly)

Other information regarding my system and setup:

  • I have an ethernet cable going from the router directly to my PC
  • I dual boot Ubuntu 20.04 and Windows 10, the issue exists on both operating systems.
  • Motherboard ethernet controller: Intel I219-V
  • Old and new routers are different models (old: Technicolor TC7230, new: Sagemcom F@ST3890)
  • My PC is the only device in the household with this issue.
  • Other devices using a lot of bandwidth do not seem to increase the frequency or duration of the disconnects.

I'm at my wits' end. Any help is greatly appreciated!

Best Answer

This is for anyone stumbling across this question with the same problem.

I managed to finally get it fixed!

I swapped my CAT.5e cable for a CAT.6 cable.

I have no idea why this fixed it. I've tried two other CAT.5e cables I had lying around, and both had the same issue. Anyway, I hope this helps someone.

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