我正在使用 Gentoo，并且 3g 调制解调器华为 E8231 有问题。据我了解，为了使其工作，我应该切换其模式：
$ lsusb
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 8087:07dc Intel Corp.
Bus 001 Device 004: ID 0bda:572a Realtek Semiconductor Corp.
Bus 001 Device 003: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 001 Device 011: ID 12d1:1f01 Huawei Technologies Co., Ltd. E353/E3131 (Mass storage mode)
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
# usb_modeswitch -v 12d1 -V 12d1 -p 1f01 -P 14db -M "55534243123456780000000000000011062000000101000100000000000000"
$ lsusb
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 8087:07dc Intel Corp.
Bus 001 Device 004: ID 0bda:572a Realtek Semiconductor Corp.
Bus 001 Device 003: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 001 Device 012: ID 12d1:14db Huawei Technologies Co., Ltd. E353/E3131
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
# dmesg
[19469.255798] usb 1-3: new high-speed USB device number 11 using xhci_hcd
[19469.396894] usb 1-3: New USB device found, idVendor=12d1, idProduct=1f01
[19469.396898] usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[19469.396900] usb 1-3: Product: HUAWEI Mobile
[19469.396901] usb 1-3: Manufacturer: HUAWEI
[19469.396903] usb 1-3: SerialNumber: FFFFFFFFFFFFFFFF
[19469.397809] usb-storage 1-3:1.0: USB Mass Storage device detected
[19469.397868] scsi host5: usb-storage 1-3:1.0
[19470.397691] scsi 5:0:0:0: CD-ROM HUAWEI Mass Storage 2.31 PQ: 0 ANSI: 2
[19470.470961] sr 5:0:0:0: [sr0] scsi-1 drive
[19470.471189] sr 5:0:0:0: Attached scsi CD-ROM sr0
[19470.471320] sr 5:0:0:0: Attached scsi generic sg1 type 5
[19591.778652] usb 1-3: USB disconnect, device number 11
[19592.095020] usb 1-3: new high-speed USB device number 12 using xhci_hcd
[19592.238652] usb 1-3: New USB device found, idVendor=12d1, idProduct=14db
[19592.238655] usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[19592.238658] usb 1-3: Product: HUAWEI Mobile
[19592.238659] usb 1-3: Manufacturer: HUAWEI
[19592.311677] cdc_ether 1-3:1.0 eth1: register 'cdc_ether' at usb-0000:00:14.0-3, CDC Ethernet Device, 00:1e:10:1f:00:00
# usb-devices
T: Bus=01 Lev=01 Prnt=01 Port=02 Cnt=01 Dev#= 12 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=02(commc) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=12d1 ProdID=14db Rev=01.02
S: Manufacturer=HUAWEI
S: Product=HUAWEI Mobile
C: #Ifs= 2 Cfg#= 1 Atr=80 MxPwr=500mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=02(commc) Sub=06 Prot=00 Driver=cdc_ether
I: If#= 1 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_ether
看起来一切都很好，但是没有任何新的设备或接口：
$ ls /dev | grep ttyUSB #empty result
$ ifconfig #no usb0
eth0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether c4:54:44:b2:ca:45 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 0 (Local Loopback)
RX packets 9445 bytes 5167034 (4.9 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 9445 bytes 5167034 (4.9 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.0.100 netmask 255.255.255.0 broadcast 192.168.0.255
inet6 fe80::fa16:54ff:fe6e:2940 prefixlen 64 scopeid 0x20<link>
ether f8:16:54:6e:29:40 txqueuelen 1000 (Ethernet)
RX packets 875123 bytes 1243972975 (1.1 GiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 391840 bytes 42394343 (40.4 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
有什么错吗？
注意：我也问过这个问题gentoo论坛
答案1
由于某种原因，该调制解调器的链接位于eth1，因此我设法使用以下命令使其工作：
# ifconfig eth0 down
# ifconfig eth1 up
# dhcpcd