Re: Realtek NIC uses over 1 Watt with no traffic

[Paul Menzel]

Dear Andrew,


Am 20.11.18 um 15:45 schrieb Andrew Lunn:
> On Tue, Nov 20, 2018 at 09:40:25AM +0100, Paul Menzel wrote:

> > Using Ubuntu 18.10, Linux 4.18.0-11-generic, PowerTOP 2.9 shows, the NIC
> > uses 1.77 Watts. A network cable is plugged in, but there is no real traffic
> > according to `iftop`. Only an email program is running.
> >
> >      $ lspci -nn -s 3:00.1
> >      03:00.1 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd.
> > RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev
> > 12)
> >
> > Is that a measurement error, or does the NIC really need that much power?

> This sounds like Energy Efficient Ethernet, EEE, is not enabled.

No, idea if the router from my provider supports that.

> What does ethtool --show-eee ethX say?

    $ sudo ethtool --show-eee enp3s0f1
    Cannot get EEE settings: Operation not supported


Kind regards,

Paul