几天前，我曾尝试将冷却风扇插入我的一个 USB 端口。令我沮丧的是，它没有工作。我拔下鼠标并将冷却风扇的插头插入那里，它工作正常，但在另一个端口上却没有任何变化。因此，出于困惑和好奇，我用鼠标的接收器替换了现在空的端口。它没有工作。令我沮丧的是，在将其放回其常用端口并使用我的 Xbox 360 为冷却风扇供电后，现在两个端口都不起作用。我将在下面粘贴 dmesg 的输出，其中两个端口都是空的，然后将鼠标插入一个端口，将 USB 键盘插入另一个端口。如果我的 dmesg 输出错误，请通知我。
空端口的 Dmesg 输出：
[ 1.520468] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 1.520476] ehci-pci: EHCI PCI platform driver
[ 1.520772] ehci-pci 0000:00:12.2: EHCI Host Controller
[ 1.520787] ehci-pci 0000:00:12.2: new USB bus registered, assigned bus number 1
[ 1.520796] ehci-pci 0000:00:12.2: applying AMD SB700/SB800/Hudson-2/3 EHCI dummy qh workaround
[ 1.520811] ehci-pci 0000:00:12.2: debug port 1
[ 1.520876] ehci-pci 0000:00:12.2: irq 17, io mem 0xd2306400
[ 1.532066] ehci-pci 0000:00:12.2: USB 2.0 started, EHCI 1.00
[ 1.532154] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[ 1.532158] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 1.532161] usb usb1: Product: EHCI Host Controller
[ 1.532164] usb usb1: Manufacturer: Linux 3.16.0-45-generic ehci_hcd
[ 1.532167] usb usb1: SerialNumber: 0000:00:12.2
[ 1.532396] hub 1-0:1.0: USB hub found
[ 1.532409] hub 1-0:1.0: 6 ports detected
[ 1.532849] ehci-platform: EHCI generic platform driver
[ 1.532877] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 1.532885] ohci-pci: OHCI PCI platform driver
[ 1.533105] ohci-pci 0000:00:12.0: OHCI PCI host controller
[ 1.533115] ohci-pci 0000:00:12.0: new USB bus registered, assigned bus number 2
[ 1.533156] ohci-pci 0000:00:12.0: irq 16, io mem 0xd2305000
[ 1.592118] usb usb2: New USB device found, idVendor=1d6b, idProduct=0001
[ 1.592122] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
插入鼠标后 Dmesg 输出：
[ 1.520468] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 1.520476] ehci-pci: EHCI PCI platform driver
[ 1.520772] ehci-pci 0000:00:12.2: EHCI Host Controller
[ 1.520787] ehci-pci 0000:00:12.2: new USB bus registered, assigned bus number 1
[ 1.520796] ehci-pci 0000:00:12.2: applying AMD SB700/SB800/Hudson-2/3 EHCI dummy qh workaround
[ 1.520811] ehci-pci 0000:00:12.2: debug port 1
[ 1.520876] ehci-pci 0000:00:12.2: irq 17, io mem 0xd2306400
[ 1.532066] ehci-pci 0000:00:12.2: USB 2.0 started, EHCI 1.00
[ 1.532154] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[ 1.532158] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 1.532161] usb usb1: Product: EHCI Host Controller
[ 1.532164] usb usb1: Manufacturer: Linux 3.16.0-45-generic ehci_hcd
[ 1.532167] usb usb1: SerialNumber: 0000:00:12.2
[ 1.532396] hub 1-0:1.0: USB hub found
[ 1.532409] hub 1-0:1.0: 6 ports detected
[ 1.532849] ehci-platform: EHCI generic platform driver
[ 1.532877] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 1.532885] ohci-pci: OHCI PCI platform driver
[ 1.533105] ohci-pci 0000:00:12.0: OHCI PCI host controller
[ 1.533115] ohci-pci 0000:00:12.0: new USB bus registered, assigned bus number 2
[ 1.533156] ohci-pci 0000:00:12.0: irq 16, io mem 0xd2305000
[ 1.592118] usb usb2: New USB device found, idVendor=1d6b, idProduct=0001
[ 1.592122] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
插入 USB 键盘和鼠标后的 Dmesg 输出：
[ 1.520468] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 1.520476] ehci-pci: EHCI PCI platform driver
[ 1.520772] ehci-pci 0000:00:12.2: EHCI Host Controller
[ 1.520787] ehci-pci 0000:00:12.2: new USB bus registered, assigned bus number 1
[ 1.520796] ehci-pci 0000:00:12.2: applying AMD SB700/SB800/Hudson-2/3 EHCI dummy qh workaround
[ 1.520811] ehci-pci 0000:00:12.2: debug port 1
[ 1.520876] ehci-pci 0000:00:12.2: irq 17, io mem 0xd2306400
[ 1.532066] ehci-pci 0000:00:12.2: USB 2.0 started, EHCI 1.00
[ 1.532154] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[ 1.532158] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 1.532161] usb usb1: Product: EHCI Host Controller
[ 1.532164] usb usb1: Manufacturer: Linux 3.16.0-45-generic ehci_hcd
[ 1.532167] usb usb1: SerialNumber: 0000:00:12.2
[ 1.532396] hub 1-0:1.0: USB hub found
[ 1.532409] hub 1-0:1.0: 6 ports detected
[ 1.532849] ehci-platform: EHCI generic platform driver
[ 1.532877] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 1.532885] ohci-pci: OHCI PCI platform driver
[ 1.533105] ohci-pci 0000:00:12.0: OHCI PCI host controller
[ 1.533115] ohci-pci 0000:00:12.0: new USB bus registered, assigned bus number 2
[ 1.533156] ohci-pci 0000:00:12.0: irq 16, io mem 0xd2305000
[ 1.592118] usb usb2: New USB device found, idVendor=1d6b, idProduct=0001
[ 1.592122] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
现在...有人能帮我吗？端口出了什么问题？是端口物理上有问题吗？还是硬件问题？请帮忙！
答案1
最有可能的是，主板上的线路被烧毁或熔断了。端口本身非常耐用，但您不能将这些端口用于风扇等大电流设备。
这是硬件问题。软件从未见过冷却风扇，冷却风扇也从未见过软件。它所做的只是从 USB 端口拉出 5VDC。