From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1B4ADC46465 for ; Tue, 20 Nov 2018 20:20:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 76815214E0 for ; Tue, 20 Nov 2018 20:20:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 76815214E0 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=molgen.mpg.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727724AbeKUGvF (ORCPT ); Wed, 21 Nov 2018 01:51:05 -0500 Received: from mx3.molgen.mpg.de ([141.14.17.11]:39665 "EHLO mx1.molgen.mpg.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725865AbeKUGvF (ORCPT ); Wed, 21 Nov 2018 01:51:05 -0500 Received: from [192.168.0.4] (ip5f5bf248.dynamic.kabel-deutschland.de [95.91.242.72]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: pmenzel) by mx.molgen.mpg.de (Postfix) with ESMTPSA id 0B7FB2012BAC06; Tue, 20 Nov 2018 21:20:08 +0100 (CET) Subject: Re: Realtek NIC uses over 1 Watt with no traffic To: Andrew Lunn Cc: Realtek linux nic maintainers , "David S. Miller" , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Heiner Kallweit References: <081beaeb-be22-55b3-2927-fec04e9f714a@molgen.mpg.de> <20181120144556.GC18335@lunn.ch> From: Paul Menzel Message-ID: <7714a7b7-ca22-19ea-499a-e2d60f3c9fb5@molgen.mpg.de> Date: Tue, 20 Nov 2018 21:20:07 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.2.1 MIME-Version: 1.0 In-Reply-To: <20181120144556.GC18335@lunn.ch> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: de-DE Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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