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Re: Re: atl1c not reaching 1000mbps



On Fri, 2014-02-07 at 13:52 +0000, echo083 wrote:
> false config ? so that's not a bug ?

There is a longstanding bug in ethtool that when auto-negotiation is
enabled you have to specify both speed and duplex to change the
advertised modes.

> i tried forcing autoneg but it didn't change the speed :
> ethtool -s eth0 speed 1000 duplex full autoneg on

That ought to work.

> full output of ethtool eth0 :
> ethtool eth0
> Settings for eth1:

Is it eth0 or eth1?  Sure you're not getting ports confused?  ethtool -p
may be helpful if you have multiple Ethernet ports.

>         Supported ports: [ TP ]
>         Supported link modes:   10baseT/Half 10baseT/Full 
>                                 100baseT/Half 100baseT/Full 
>                                 1000baseT/Full 
>         Supports auto-negotiation: Yes
>         Advertised link modes:  Not reported

This line is weird and is surely a driver bug.

>         Advertised pause frame use: No
>         Advertised auto-negotiation: Yes
>         Speed: 100Mb/s
>         Duplex: Full
[...]

I seem to remember that some systems pair an Atheros gigabit controller
with a 100M PHY, so they don't support gigabit Ethernet.  However the
driver should be able to detect and report the actual capabilities.  Can
you re-check the specifications for your system or network card, to see
whether it is supposed to support gigabit Ethernet?

Ben.

-- 
Ben Hutchings
It is a miracle that curiosity survives formal education. - Albert Einstein

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