我最近购买的 Ralink Technology, Corp. MT7601U 无线适配器 (USB) 无法连接。但是我还有另一个几个月前购买的同名适配器，插入后即可使用。我在 Windows 7 机器上尝试了在 Ubuntu 中无法使用的适配器，结果可以使用。因此，我不确定设备出了什么问题。
我尝试过的命令的输出。
lsusb: Bus 002 Device 086: ID 148f:7601 Ralink Technology, Corp. MT7601U Wireless Adapter Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 016: ID 148f:7601 Ralink Technology, Corp. MT7601U Wireless Adapter
dmesg: [ 2208.272445] mt7601u 2-6:1.0: Error: RX urb failed:-71 [ 2208.272501] mt7601u 2-6:1.0: Error: MCU resp urb failed:-71 [ 2208.272506] mt7601u 2-6:1.0: Error: MCU resp evt:0 seq:5-4! [ 2208.276732] mt7601u 2-6:1.0: Error: RX urb failed:-71 [ 2208.276957] mt7601u 2-6:1.0: Error: MCU resp urb failed:-71 [ 2208.276961] mt7601u 2-6:1.0: Error: MCU resp evt:0 seq:5-4! [ 2208.280919] mt7601u 2-6:1.0: Error: RX urb failed:-71 [ 2208.281165] mt7601u 2-6:1.0: Error: MCU resp urb failed:-71 [ 2208.281170] mt7601u 2-6:1.0: Error: MCU resp evt:0 seq:5-4! [ 2208.285196] mt7601u 2-6:1.0: Error: RX urb failed:-71 [ 2208.285443] mt7601u 2-6:1.0: Error: MCU resp urb failed:-71 [ 2208.285447] mt7601u 2-6:1.0: Error: MCU resp evt:0 seq:5-4! [ 2208.289445] mt7601u 2-6:1.0: Error: RX urb failed:-71 [ 2208.289659] mt7601u 2-6:1.0: Error: MCU resp urb failed:-71 [ 2208.289662] mt7601u 2-6:1.0: Error: MCU resp evt:0 seq:5-4! [ 2208.289665] mt7601u 2-6:1.0: Error: mt7601u_mcu_wait_resp timed out [ 2208.511475] mt7601u 2-6:1.0: Vendor request req:07 off:0080 failed:-71 [ 2208.707474] mt7601u 2-6:1.0: Vendor request req:02 off:0080 failed:-71 [ 2208.907509] mt7601u 2-6:1.0: Vendor request req:02 off:0080 failed:-71