Arch Linux

IgorSabadini

Member

Registered: 2025-11-22

Posts: 3

[SOLVED] Limited cabled internet speed

sudo ethtool eno1

Settings for eno1:
        Supported ports: [ TP ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Supported pause frame use: Symmetric Receive-only
        Supports auto-negotiation: Yes
        Supported FEC modes: Not reported
        Advertised link modes:  10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Advertised pause frame use: Symmetric Receive-only
        Advertised auto-negotiation: Yes
        Advertised FEC modes: Not reported
        Link partner advertised link modes:  10baseT/Half 10baseT/Full
                                             100baseT/Half 100baseT/Full
        Link partner advertised pause frame use: Symmetric Receive-only
        Link partner advertised auto-negotiation: Yes
        Link partner advertised FEC modes: Not reported
        Speed: 100Mb/s
        Duplex: Full
        Auto-negotiation: on
        Port: Twisted Pair
        PHYAD: 1
        Transceiver: internal
        MDI-X: on (auto)
        Supports Wake-on: pumbg
        Wake-on: g
        Current message level: 0x00000007 (7)
                               drv probe link
        Link detected: yes

My internet is of 400 Mb/s and the speed tested is limited at 100 Mb/s that I think have something to do with the "Link partner advertised link modes" been capped. I read that this is related with my internet provider, but the wifi of my Android phone is achieving greater speed than the cabled internet in my pc, which never happened. I have been using the same internet in years in a windows OS, now I changed to Arch and this happens. I really confused about it all. Thanks in advance.

Last edited by IgorSabadini (2025-11-22 06:42:56)

Scimmia

Fellow

Registered: 2012-09-01

Posts: 13,351

Re: [SOLVED] Limited cabled internet speed

Yeah, from that, whatever you're plugging into only supports 100baseT.

IgorSabadini

Member

Registered: 2025-11-22

Posts: 3

Re: [SOLVED] Limited cabled internet speed

I was able to solve it by installing Modem Manager by the steps described in https://wiki.archlinux.org/title/NetworkManager in section 1.3. After I installed the ethtool command generates:

Settings for eno1:
        Supported ports: [ TP ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Supported pause frame use: Symmetric Receive-only
        Supports auto-negotiation: Yes
        Supported FEC modes: Not reported
        Advertised link modes:  10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Advertised pause frame use: Symmetric Receive-only
        Advertised auto-negotiation: Yes
        Advertised FEC modes: Not reported
        Link partner advertised link modes:  10baseT/Half 10baseT/Full
                                             100baseT/Half 100baseT/Full
                                             1000baseT/Half 1000baseT/Full
        Link partner advertised pause frame use: Symmetric Receive-only
        Link partner advertised auto-negotiation: Yes
        Link partner advertised FEC modes: Not reported
        Speed: 1000Mb/s
        Duplex: Full
        Auto-negotiation: on
        Port: Twisted Pair
        PHYAD: 1
        Transceiver: internal
        MDI-X: off (auto)
        Supports Wake-on: pumbg
        Wake-on: g
        Current message level: 0x00000007 (7)
                               drv probe link
        Link detected: yes

And I was able to get full internet connection.

Last edited by IgorSabadini (2025-11-22 06:45:07)

seth

Member

From: Don't DM me only for attention

Registered: 2012-09-03

Posts: 71,538

Re: [SOLVED] Limited cabled internet speed

Get ready for this to be a fluke and/or cable/plug related.
MM devices would start w/ "ww", it's not overly plausible that even iff you have such device the installation of MM would do anything about the modes advertised by a link partner on an ethernet connection…

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IgorSabadini

Member

Registered: 2025-11-22

Posts: 3

Re: [SOLVED] Limited cabled internet speed

Get ready for this to be a fluke and/or cable/plug related.
MM devices would start w/ "ww", it's not overly plausible that even iff you have such device the installation of MM would do anything about the modes advertised by a link partner on an ethernet connection…

Thanks for the answer. I'll be aware, if the problem return I'll open another post with this issue linked.