我无法通过 Dell Inspiron 5520. Ubuntu 12.04 上的 USB 3.0 建立移动宽带连接（我在 NW 中创建了新连接）。lsusb：
Bus 003 Device 005: ID 12d1:1446 Huawei Technologies Co., Ltd. E1552/E1800 (HSPA modem)
插入后记录：
USB_ModeSwitch log from Fri Aug 17 00:12:39 2012
Using global config file: /etc/usb_modeswitch.conf
Raw args from udev: /3-4:1.0
Bus ID for device not given by udev.
Trying to determine it from kernel name (3-4:1.0) ...
Using top device dir /sys/bus/usb/devices/3-4
USB dir exists: /sys/bus/usb/devices/3-4
Warning: USB attribute "serial" not readable.
SCSI dir exists: /sys/bus/usb/devices/3-4 …