Re: [E1000-devel] False ethtool report on Link Detection

[Anand R. M. <an...@gm...>]

On Tue, Mar 26, 2013 at 12:09 PM, Waskiewicz Jr, Peter P
<pet...@in...> wrote:
> On 3/25/2013 10:56 PM, Anand Raj Manickam wrote:
>>
>> I m using the e1000e driver for Intel 82574L chipset .
>> When the cable is plugged in and Auto Negotiated , It reports as Link
>> Detected as NO. I need to do a ifconfig up eth3 to get the Link
>> Detected as YES .
>
>
> I suspect the PHY is powered down (intentionally) in this case.  My guess is
> the interface isn't enabled to be automatically brought up either by
> NetworkManager or the SysV network init scripts (or by *gasp* systemd).
> Setting the interface to be brought up on boot will solve this for you.
>
> The ethtool output is telling you how the driver is configured.  In the case
> you have below, it's ready to perform autonegotiation, but the PHY hasn't
> been brought online yet (hence no link detection).  It doesn't mean that the
> link has already been established and autonegotiated.
>
> Hope this helps,
> -PJ
>
>> Is this the expected behavior of the new driver -  e1000e: Intel(R)
>> PRO/1000 Network Driver - 2.2.14-NAPI .
>> Is there a work around on the driver for this ?
>>
>> ethtool eth3
>> Settings for eth3:
>>         Supported ports: [ TP ]
>>         Supported link modes:   10baseT/Half 10baseT/Full
>>                                 100baseT/Half 100baseT/Full
>>                                 1000baseT/Full
>>         Supports auto-negotiation: Yes
>>         Advertised link modes:  10baseT/Half 10baseT/Full
>>                                 100baseT/Half 100baseT/Full
>>                                 1000baseT/Full
>>         Advertised auto-negotiation: Yes
>>         Speed: 1000Mb/s
>>         Duplex: Full
>>         Port: Twisted Pair
>>         PHYAD: 1
>>         Transceiver: internal
>>         Auto-negotiation: on
>>         Supports Wake-on: pumbg
>>         Wake-on: g
>>         Current message level: 0x00000007 (7)
>>         Link detected: no

I did try to bring up the Link on Boot but still the same behavior .
I tried this option to bring PHY up

alias eth2 e1000e
options SmartPowerDownEnable=1

still no dice ..