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Thread: Ubuntu 20.04 Wired Slow Connection

  1. #1
    Join Date
    May 2020
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    2

    Ubuntu 20.04 Wired Slow Connection

    I have just installed Ubuntu 20.04 and I am facing a pretty big issue. My download speeds are really low compared to the Windows 10 that I have installed on dual-boot setup. Here you can see the difference: [Pictures].

    My network adapter is Lenovo RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller.

    I have tried changing the DNS options but that doesn't help.
    Also I've installed "r8168-dkms_8.048.02-1_all.deb" instead of r8169 which I've added into blacklist.conf. Still the same issues.
    Any suggestions?
    Thank you!

    Device is a Lenovo Y700-15ISK Laptop.


    [lshw output]


    Also, the ifconfig shows a lot of dropped RX packages that are increasing as we speak: [Evidence]

  2. #2
    Join Date
    Feb 2017
    Beans
    11

    Re: Ubuntu 20.04 Wired Slow Connection

    Not sure if this will hep you but it did fix my problem.

    sudo sed -i 's/wifi.powersave = 3/wifi.powersave = 2/' /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf
    systemctl restart network-manager.service

  3. #3
    Join Date
    May 2013
    Location
    Galiza
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    2,660
    Distro
    Ubuntu

    Re: Ubuntu 20.04 Wired Slow Connection

    Quote Originally Posted by gary.allan.garibaldi View Post
    Not sure if this will hep you but it did fix my problem.

    sudo sed -i 's/wifi.powersave = 3/wifi.powersave = 2/' /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf
    systemctl restart network-manager.service
    No, it won't help at all.
    Why do you think something to change the power saving profile of a WiFi would help with Ethernet?

  4. #4
    Join Date
    May 2020
    Beans
    2

    Re: Ubuntu 20.04 Wired Slow Connection

    Yeah, on Wi-Fi the speeds are even slower than that, but that's kinda normal. The router only support 100Mbits/s on Wi-Fi. I still think that it's a driver issue because I can see that RX packets drop increase as we speak. It's the same behavior on r8169 also. Maybe no driver yet compatible witb 20.04?

  5. #5
    Join Date
    Feb 2017
    Beans
    11

    Re: Ubuntu 20.04 Wired Slow Connection

    Sorry. Miss read your post.

  6. #6
    Join Date
    Aug 2011
    Location
    Berlin, Germany
    Beans
    7,861
    Distro
    Ubuntu Mate 16.04 Xenial Xerus

    Re: Ubuntu 20.04 Wired Slow Connection

    Change the mtu-value in your network profile to a number instead of "Automatic". Check your ISPs info for that

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