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maxwatt
Asked: 2020-04-12 05:24:25 +0800 CST

如何禁用以太网卡省电功能？

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我正在使用 Ubuntu 18.04，我需要完全禁用我的以太网购物车省电功能。

我不需要更改任何其他系统省电设置，只需更改以太网卡之一。

此外，在任何重新启动后保持这个新设置也很棒。

power-management ethernet 18.04

1 个回答

  1. Best Answer

    经过一些研究，我发现了这一点：

    What:       /sys/devices/.../power/control
Date:       January 2009
Contact:    Rafael J. Wysocki <[email protected]>
Description:
        The /sys/devices/.../power/control attribute allows the user
        space to control the run-time power management of the device.

        All devices have one of the following two values for the
        power/control file:

        + "auto\n" to allow the device to be power managed at run time;
        + "on\n" to prevent the device from being power managed;

        The default for all devices is "auto", which means that they may
        be subject to automatic power management, depending on their
        drivers.  Changing this attribute to "on" prevents the driver
        from power managing the device at run time.  Doing that while
        the device is suspended causes it to be woken up.

    源文档来自：内核文档

    所以我找到的最终解决方案如下：

    sudo echo "on" > /sys/class/net/"$(ls /sys/class/net/ | grep -E '^e')"/power/control

    该"$(ls /sys/class/net/ | grep -E '^e')"块用于查找第一个'e'设备（以太网设备卡）。

    更新： 最后，我管理了如何每 5 秒运行一次此脚本root，只需将以下脚本添加为/etc/cron.d/ethernet-control

    SHELL=/bin/bash
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
MAILTO=""

* * * * * root for i in {1..12}; do (echo 'on' > /sys/class/net/"$(ls /sys/class/net/ | grep -E '^e')"/power/control) 2>/dev/null; sleep 5; done;
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