From: Andrew Lunn <andrew@lunn.ch>
To: Paul Menzel <pmenzel@molgen.mpg.de>
Cc: Realtek linux nic maintainers <nic_swsd@realtek.com>,
"David S. Miller" <davem@davemloft.net>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
Heiner Kallweit <hkallweit1@gmail.com>
Subject: Re: Realtek NIC uses over 1 Watt with no traffic
Date: Tue, 20 Nov 2018 15:45:56 +0100 [thread overview]
Message-ID: <20181120144556.GC18335@lunn.ch> (raw)
In-Reply-To: <081beaeb-be22-55b3-2927-fec04e9f714a@molgen.mpg.de>
On Tue, Nov 20, 2018 at 09:40:25AM +0100, Paul Menzel wrote:
> Dear Linux folks,
>
>
> 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?
Hi Paul
This sounds like Energy Efficient Ethernet, EEE, is not enabled.
What does ethtool --show-eee ethX say?
Andrew
next prev parent reply other threads:[~2018-11-20 14:45 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-20 8:40 Realtek NIC uses over 1 Watt with no traffic Paul Menzel
2018-11-20 14:45 ` Andrew Lunn [this message]
2018-11-20 20:14 ` Heiner Kallweit
2018-11-20 20:31 ` Paul Menzel
2018-11-20 21:06 ` Heiner Kallweit
2018-11-20 22:25 ` Paul Menzel
2018-11-20 22:29 ` Heiner Kallweit
2018-11-20 20:20 ` Paul Menzel
2018-11-20 20:37 ` Andrew Lunn
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