关闭单个 USB 设备...再次 [英] Turning off a single usb device... again

问题描述

我知道这个话题已经讨论过很多次了，但没有一个答案对我有帮助.作为记录，我正在运行 Debian.

I know that this topic has been discussed many times, but none of the answers helped me. For the record, i'm running Debian.

交易是:我买了一个 USB 供电的 LED 灯，它非常简单，甚至没有开/关开关(它可以工作并且一直亮着).我希望能够通过命令行打开/关闭它.这是我尝试过的:

The deal is: I bought an usb powered led lamp, which is very simple and doesn't even have an on/off switch (it works and is always on). I want to be able to turn it on/off via command line. Here's what i tried:

    echo on > /sys/bus/usb/devices/usb1/power/level       # turn on
    echo suspend > /sys/bus/usb/devices/usb1/power/level  # turn off

这是我在许多论坛上发现的.打开打开"有效，但暂停"产生

which is what i've found on many forums. Turning "on" works, but "suspending" yields

    -su: echo: write error: Invalid argument

适用于每个 USBN.我也试过了

for every usbN. I also tried

    echo "0" > "/sys/bus/usb/devices/usbX/power/autosuspend_delay_ms"

它不会给出错误，但也不会做任何事情(同样，对于每个 usbN)

which doesn't give an error, but also doesn't do anything (again, for every usbN)

尝试

    echo "usb1" > /sys/bus/usb/drivers/usb/unbind

仅适用于更智能"的设备，例如键盘、鼠标或 USB wifi 卡.我的意思是只有tyhose设备被关闭，其他usbN不会出错，但灯永远不会熄灭.

works only for more "inteligent" devices, like the keyboard, the mouse, or the usb wifi card. What i mean is that only tyhose devices are turned off, other usbN don't give an error, but the lamp never goes off.

/sys/bus/usb/devices/的内容是

the contents of /sys/bus/usb/devices/ are

    1-0:1.0 1-1:1.0 1-2:1.0 1-2:1.2 2-0:1.0 4-0:1.0 4-1:1.0 6-0:1.0 8-0:1.0 8-2:1.0 usb2 usb4 usb6 usb8
    1-1 1-2 1-2:1.1 1-2:1.3 3-0:1.0 4-1 5-0:1.0 7-0:1.0 8-2 usb1 usb3 usb5 usb7

我试过了

    echo device_name > /sys/bus/usb/drivers/usb/unbind

对它们中的每一个，但只有设备 usbN 和 N-M 做出反应，形式为 n-m:x.y 的设备产率

with every single one of them, but only the devices usbN and N-M react, the ones of the form n-m:x.y yield

    tee: /sys/bus/usb/drivers/usb/bind: No such device

(例如，我尝试输入1-0:1.0"、1-0:1.0"和1-0:1.0"，都给出了相同的结果).

(i tried putting in, for instance, "1-0:1.0", "1-0:1.0" and "1-0:1.0", all gave the same result).

最后一件事，执行后显示什么

One last thing, what is shown after executing

    lsusb -t

当我插入或拔下灯时不会改变.

does not change when i plug or unplug the lamp.

有什么想法吗?

推荐答案

关闭设备ID 2-1:

Turn off device ID 2-1:

echo '2-1' |sudo tee/sys/bus/usb/drivers/usb/unbind

重新打开设备 ID 2-1:

Turn device ID 2-1 back on:

echo '2-1' |sudo tee/sys/bus/usb/drivers/usb/bind

在我的例子中，使用设备 ID 2-1 控制我的 USB 记忆棒的电源，从而控制灯.

In my case, using device ID 2-1 controls power to my usb stick, and as a consequence controls the light.

• 提示:如果他们在 Debian 中为您工作，请为他们创建一个别名，以便您以后的生活更轻松.

希望这会有所帮助，苏

这篇关于关闭单个 USB 设备...再次的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！