13

I've had some weird internet issues since upgrading.

First of all, my wifi USB dongle stopped working so I thought it was broken, I replaced it and was getting speeds of under 1 Mbps.

Since then I have had very poor download speeds, and surfing has been a bit hit and miss with some sites loading instantly, and others crawling. everything was fine using the same hardware on 16.04

What can I do to speed things up?

Thanks!

Zanna
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Syteanric
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2 Answers2

25

I just fixed this on ubuntu 18.04 - turns out there is some kind of issue with 802.11n and iwlwifi Intel chips. The solution is to turn it off.
Check if it works first with:

sudo modprobe -r iwlwifi

sudo modprobe iwlwifi 11n_disable=1

Make it permanent with this command:

echo "options iwlwifi 11n_disable=1" | sudo tee /etc/modprobe.d/iwlwifi.conf

I did this and my wifi speeds instantly went back to normal.

Ben Warren
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0

I just fixed this on ubuntu 18.04 - turns out there is some kind of issue with 802.11n and iwlwifi Intel chips.

That's for sure 8-) ! With a Advanced-N 6200 in a computer I just picked up, I was getting freezes (no LEDs so I don't know if the kernel paniced..) within a minute or two once I started rsync'ing some files over. 11n_disable=1 solved this for me.

Update: Actually I had freezes with 11n_disable=1 also; I popped my case open and found the card was not fully seated!

hwertz
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