嘿，
lsusb 无法检测到 TOSHIBA USB 2.0 硬盘，也无法通过 ls /dev/sd* 找到它。
根据保罗问题与 USB 电源有关，但在重新启动笔记本电脑且未连接 USB 设备后，系统日志的输出相同（见下文）。此外，我使用双头 USB 电缆来确保电源供应。
如何让 Ubuntu 枚举/识别我的 DELL LX502x 上的 USB 驱动器？
再见
Feb 18 12:32:32 laptop kernel: [ 166.175281] usb 3-2: new full-speed USB device number 6 using xhci_hcd
Feb 18 12:32:32 laptop kernel: [ 166.175712] usb 3-2: Device not responding to set address.
Feb 18 12:32:33 laptop kernel: [ 166.379229] usb 3-2: Device not responding to set address.
Feb 18 12:32:33 laptop kernel: [ 166.582606] usb 3-2: device not accepting address 6, error -71
Feb 18 12:32:33 laptop kernel: [ 166.694423] usb 3-2: new full-speed USB device number 7 using xhci_hcd
Feb 18 12:32:33 laptop kernel: [ 166.694835] usb 3-2: Device not responding to set address.
Feb 18 12:32:33 laptop kernel: [ 166.898418] usb 3-2: Device not responding to set address.
Feb 18 12:32:33 laptop kernel: [ 167.101839] usb 3-2: device not accepting address 7, error -71
Feb 18 12:32:33 laptop kernel: [ 167.213620] usb 3-2: new full-speed USB device number 8 using xhci_hcd
Feb 18 12:32:33 laptop kernel: [ 167.214055] usb 3-2: Device not responding to set address.
Feb 18 12:32:34 laptop kernel: [ 167.417702] usb 3-2: Device not responding to set address.
Feb 18 12:32:34 laptop kernel: [ 167.621033] usb 3-2: device not accepting address 8, error -71
Feb 18 12:32:34 laptop kernel: [ 167.732798] usb 3-2: new full-speed USB device number 9 using xhci_hcd
Feb 18 12:32:34 laptop kernel: [ 167.733227] usb 3-2: Device not responding to set address.
Feb 18 12:32:34 laptop kernel: [ 167.936909] usb 3-2: Device not responding to set address.
Feb 18 12:32:34 laptop kernel: [ 168.140214] usb 3-2: device not accepting address 9, error -71
Feb 18 12:32:34 laptop kernel: [ 168.140268] hub 3-0:1.0: unable to enumerate USB device on port 2