我正在运行一个通过 USB 连接到 Tripp Lite SMART1500LCD 的坚果服务器。设备行为异常，我可以看到这些内核消息：
user@host:~ $ dmesg -T
[Wed Dec 4 13:24:24 2019] usb 1-1.5: USB disconnect, device number 91
[Wed Dec 4 13:24:25 2019] usb 1-1.5: new low-speed USB device number 92 using dwc_otg
[Wed Dec 4 13:24:25 2019] usb 1-1.5: New USB device found, idVendor=09ae, idProduct=2012, bcdDevice= 0.09
[Wed Dec 4 13:24:25 2019] usb 1-1.5: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[Wed Dec 4 13:24:25 2019] usb 1-1.5: Product: Tripp Lite UPS …