自从从 17.10 升级到 Ubuntu 18.04 以来，我的 USB 以太网适配器一直断开连接。它曾经与 17.10 完美配合。
dmesg 在连接断开时显示以下输出：
[ 273.462732] usb 4-1.4: usb_reset_and_verify_device Failed to disable LTM
.
[ 273.643622] usb 4-1.4: USB disconnect, device number 11
[ 273.795468] usb 4-1.4: new SuperSpeed USB device number 12 using xhci_hcd
[ 273.816520] usb 4-1.4: New USB device found, idVendor=0bda, idProduct=8153
[ 273.816522] usb 4-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=6
[ 273.816523] usb 4-1.4: Product: USB 10/100/1000 LAN
[ 273.816524] usb 4-1.4: Manufacturer: Realtek
[ 273.816525] …