Internet access speed drops suddenly

Question

I have been using Ubuntu for six years. Since 20.04 LTS, the internet access (wifi) drops suddenly and randomly from 20Mb/s for download to 1Mb/s or even below! Sometimes it works flawlessly, sometimes I need to reboot twice a day. Unfortunately, the problem persists in Ubuntu 22.04 too.

I tried out most of the tricks recommended here but with no avail: https://blog.rottenwifi.com/ubuntu-slow-internet/

According to some, the standard 5.15 kernel in Ubuntu 22.04 LTS is responsible for bad wifi behaviour. One guy recommends downgrading to 5.13 the other one prefers upgrading to 5.17: wifi issues in ubuntu 22.04LTS

What to do???

Any suggestion will be greatly appreciated

Just want to add that the internet access on a different laptop running under MS Windows works perfectly. — András Szőllős, Oct 04 '22 at 14:26
Perhaps you shoult tell about your kind of internet connection and your network konnection, pe. use DSL or UMTS and use Rthernet or WiFi and so on. — Alfred.37, Oct 04 '22 at 17:31
I am using Wifi. I apologize myself for being an utter layman in IT - I just like Linux. — András Szőllős, Oct 05 '22 at 06:29
Tell about your wifi connection. Name of router, name of your wifi card. — Alfred.37, Oct 05 '22 at 07:59
also, it'd be helpful to know if you are using any VPN service — alfx, Oct 05 '22 at 08:39

Alfred.37 · Answer 1 · 2022-10-05T08:26:26.887

0

Check the configuration of your wifi router and set to follow values if possible:

Place your router on a good place. See follow: https://blog.gl-inet.com/my-wifi-is-slow-where-to-place-my-router/
Set the right country. Depend on law, different country`s have different count and power of wifi channels. So it shouldn't be set different on your router and your pc.
Set your channel selection on you router to auto channel.
If possible, use MiMo supporting devices (thats supportted by a part of wifi5 and all WiFi6 devices). This one have a much better handling in environments with a high count of wifi devices.
Enable DFS support on your router, if possible. That protect you a little bit about wifi issues around airports, which are related on weather radar.
Often you find a menue item on your router like "Do you like to support "b, g, n, ac, ax", if you dont need and if possible, disable "WiFi b and g" on your router.

edited Oct 05 '22 at 08:26

answered Oct 05 '22 at 08:16

Alfred.37

79

Thank you for your valuable input Alfred 37! However, do you really believe it may be a router-issue? When having checked with my wife yesterday after the download speed on my laptop had dropped again from 24Mb/s to 0.5Mb/s, the speedtest on her MS Windows-powered computer gave 13Mb/s for download. Her laptop is using the same router as mine. Is it not rather a Ubuntu-Linux flaw? Just my two cents... – András Szőllős Oct 05 '22 at 12:03
@AndrásSzőllős those additional bits of information would be better placed as an edit in your original question. – graham Oct 05 '22 at 13:05

Internet access speed drops suddenly

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