我最近刚收到一个 Das Keyboard，我想把它用在我的联想笔记本电脑上。当我第一次插入它时，它工作正常。几天前我不得不重新启动，从那以后我就没法让它工作了。当我执行 lsusb 时它甚至不会显示，所以当我执行 dmesg 时，它显示了以下内容（截断）：
[ 123.174691] usb 1-3: new full-speed USB device number 14 using xhci_hcd
[ 123.302592] usb 1-3: device descriptor read/64, error -71
[ 123.538221] usb 1-3: device descriptor read/64, error -71
[ 123.773988] usb 1-3: new full-speed USB device number 15 using xhci_hcd
[ 123.902039] usb 1-3: device descriptor read/64, error -71
[ 124.138200] usb 1-3: device descriptor read/64, error -71
[ 124.246144] usb usb1-port3: attempt power cycle
[ 124.897060] usb 1-3: new full-speed USB device number 16 using xhci_hcd
[ 124.897265] usb 1-3: Device not responding to setup address.
[ 125.105047] usb 1-3: Device not responding to setup address.
[ 125.312629] usb 1-3: device not accepting address 16, error -71
[ 125.440659] usb 1-3: new full-speed USB device number 17 using xhci_hcd
[ 125.440872] usb 1-3: Device not responding to setup address.
[ 125.649011] usb 1-3: Device not responding to setup address.
[ 125.856604] usb 1-3: device not accepting address 17, error -71
[ 125.856738] usb usb1-port3: unable to enumerate USB device
我做了一些显而易见的事情，即关闭电脑，拔掉所有电源，然后让它静置（甚至一整夜）。我更改了自动挂起功能（使用“autosuspend”而不是“autosuspend_delay_ms”，因为前者在我重建启动文件时占用了。）我不记得还有什么其他操作。到目前为止，什么都没起作用，除非我操作不正确。
我问了两个问题：a.) 我可以做一些不同的事情来在 Ubuntu 18 中发挥作用吗？b.) “错误 -71”具体是什么意思？
谢谢。
答案1
我发现一些信息表明较新的 Gigabyte 主板存在错误。请查看：https://unix.stackexchange.com/questions/72625/why-is-usb-not-working-in-linux-when-it-works-in-uefi-bios
编辑：基本上，您可能还需要IOMMU Controller在 BIOS 中启用该选项XHCI（EHCI如果可用）。