Subject: Re: 3.0.0rc6: ethtool not working without a cable

From: Ben Hutchings <[email-masked]>
Date: Wed, 06 Jul 2011 15:28:04 +0100

On Wed, 2011-07-06 at 13:38 +0200, Arkadiusz Miskiewicz wrote:
> 3.0.0rc6, thinkpad t400 notebook.
> 
> If there is no cable then ethtool reports no device. It wasn't that before 
> AFAIK.
> 
> ethtool version 2.6.36
> 
> 
> cable disconnected:
> 
> [root@t400 ~]# ethtool eth0
> Settings for eth0:
> Cannot get device settings: No such device
> Cannot get wake-on-lan settings: No such device
> Cannot get message level: No such device
> Cannot get link status: No such device
> No data available
> zsh: exit 75    ethtool eth0
> [root@t400 ~]# ethtool -i eth0
> Cannot get driver information: No such device
> zsh: exit 71    ethtool -i eth0
[...]

Then there really isn't a device under that name.  Maybe the driver is
getting a bogus MAC address, so that the device is renamed by udev.

Check which devices do exist, and the MAC addresses they have, using 'ip
link'.

Ben.

-- 
Ben Hutchings, Senior Software Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.