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#1 2018-11-03 10:32:17

aliyuchang33
Member
Registered: 2018-11-03
Posts: 6

Killer E2400 nego 100mbps under arch but 1000mbps under livecd and win

I got a laptop with E2400. Os are `Archlinux` and `Windows`.
It performs 100 mbps speed under Arch.
The interesting thing is it can perform 1000mbps under Archlinix livecd(Release about 2018-10-1) and Windows 10.
ethtool output:

```
Settings for enp109s0:
        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:  Not reported
        Advertised pause frame use: No
        Advertised auto-negotiation: No
        Advertised FEC modes: Not reported
        Speed: 100Mb/s
        Duplex: Half
        Port: Twisted Pair
        PHYAD: 0
        Transceiver: internal
        Auto-negotiation: off
        MDI-X: Unknown
        Current message level: 0x000060e4 (24804)
                               link ifup rx_err tx_err hw wol
        Link detected: yes
```

dmesg:
```
[ 1776.595770] alx 0000:6d:00.0 enp109s0: Link Down
[ 1776.799791] userif-3: sent link down event.
[ 1776.799797] userif-3: sent link up event.
[ 1778.798669] alx 0000:6d:00.0 enp109s0: NIC Up: 100 Mbps Half
[ 1778.999267] userif-3: sent link down event.
[ 1778.999273] userif-3: sent link up event.
```

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#2 2018-11-03 13:10:06

seth
Member
Registered: 2012-09-03
Posts: 50,008

Re: Killer E2400 nego 100mbps under arch but 1000mbps under livecd and win

Advertised auto-negotiation: No
...
Speed: 100Mb/s
Duplex: Half
...
Auto-negotiation: off
ethtool enp109s0 autoneg on
ethtool -s enp109s0 duplex full
man ethtool

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#3 2018-11-04 03:54:01

aliyuchang33
Member
Registered: 2018-11-03
Posts: 6

Re: Killer E2400 nego 100mbps under arch but 1000mbps under livecd and win

Tried. Invalid argument. Had added -s in ethtool parameter.

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#4 2018-11-04 05:22:43

aliyuchang33
Member
Registered: 2018-11-03
Posts: 6

Re: Killer E2400 nego 100mbps under arch but 1000mbps under livecd and win

Solved. By changing to cat6e wire. Cat5e cant nego to 1000mbps.

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#5 2018-11-04 07:54:40

seth
Member
Registered: 2012-09-03
Posts: 50,008

Re: Killer E2400 nego 100mbps under arch but 1000mbps under livecd and win

Please always remember to mark resolved threads by editing your initial posts subject - so others will know that there's no task left, but maybe a solution to find.
Thanks.

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