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Why internet download speed is limited in ubuntu 22.04 and 22.10

tj flag

I installed Ubuntu 22.10 after 22.04. In version 22.04 I had an awful experience with the internet connection. The problem may be caused by the Kernel version used by 22.04, and I had to upgrade the Kernel version from 5.15 to 5.17(there are many recommendations about it in forums). But, I decided to install ubuntu 22.10, which uses kernel 5.19. The problem has remained. For example, I got OpenJDK through the terminal by 6 kB/s! I even used my mobile internet, but I got the same result. I had to download Eclipse IDE on my mobile and transfer it to my computer to avoid waiting for 23 hours to download! There is nothing left that I have not done. Please help me!

The things I have done until now :

  1. manipulating /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf and change wifi.powersave from 3 to 2
  2. upgrading the kernel version from 5.15 to 5.19
  3. manipulating /etc/sysctl.conf and add following commands to the end of file : net.core.rmem_default = 32768
    net.core.rmem_max = 32768
    net.core.wmem_default = 32768
    net.core.wmem_max = 32768
    net.ipv4.tcp_wmem = 4096 32768 32768
    net.ipv4.tcp_rmem = 4096 32768 32768
    net.ipv4.tcp_mem = 32768 32768 32768
    net.ipv4.tcp_rfc1337 = 1
    net.ipv4.ip_no_pmtu_disc = 0
    net.ipv4.tcp_sack = 1
    net.ipv4.tcp_fack = 1
    net.ipv4.tcp_window_scaling = 1
    net.ipv4.tcp_timestamps = 1
    net.ipv4.tcp_ecn = 0
    net.ipv4.route.flush = 1

my laptop's specs

Pilot6 avatar
cn flag
Download speed is not limited in Ubuntu. You may have some problem with a piece of hardware or some other problem unrelated to the OS. You didn't provide any hardware information. So the question is not answerable.
mook765 avatar
cn flag
It is impossible to help if there is nothing left that you haven't done.
Hannu avatar
ca flag
https://askubuntu.com/help/how-to-ask - 1) Search and research - and tell *in your post* what you **actually** have done, 3) Be specific, 5) Keep an open mind -- without these one can only guess, and that will not allow anyone to find a suitable answer.
Mojtaba Zamani avatar
tj flag
@Pilot6 I added the hardware info. How come it can be related to hardware? What should I look for?
Pilot6 avatar
cn flag
Are you using a wired or a wireess connection?
Mojtaba Zamani avatar
tj flag
@Pilot6 I have tried both of them.
Pilot6 avatar
cn flag
Try to boot from a LiveUSB and check the speed. If it is OK, then it is some wrong setting.
cc flag
Problem might be upstream. Try a different download mirror, and even a different ISP.
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