a133 linux4.9 安装驱动
insmod usb_wwan.ko
insmod option.ko
之后能出来 ttyUSB，但是很快 USB 就断了，lsusb查不到设备，然后又连上，就这样断断续续。
同样这块板卡，我在 linux5.4上是正常能拨号上网的！换成 linux4.9 就不行了，我需要用4.9的内核
有大佬知道是怎么回事吗，救救孩子吧...
[ 50.256494] usb 1-1.2: new high-speed USB device number 13 using sunxi-ehci
[ 50.367258] usb 1-1.2: New USB device found, idVendor=1e0e, idProduct=9011
[ 50.367287] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 50.367307] usb 1-1.2: Product: A76XX Series LTE Module
[ 50.367326] usb 1-1.2: Manufacturer: SIMCom Wireless Solution
[ 50.367345] usb 1-1.2: SerialNumber: 200806006809080000
[ 50.392248] option 1-1.2:1.2: GSM modem (1-port) converter detected
[ 50.395694] usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 50.401911] option 1-1.2:1.4: GSM modem (1-port) converter detected
[ 50.407770] usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 50.411814] option 1-1.2:1.5: GSM modem (1-port) converter detected
[ 50.414248] usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 50.418448] option 1-1.2:1.3: GSM modem (1-port) converter detected
[ 50.421087] usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB3
[ 52.121589] usb 1-1.2: USB disconnect, device number 13
[ 52.139186] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 52.140269] option 1-1.2:1.2: device disconnected
[ 52.147192] option1 ttyUSB3: usb_wwan_open: submit read urb 0 failed: -19
[ 52.147213] option1 ttyUSB3: usb_wwan_open: submit read urb 1 failed: -19
[ 52.147227] option1 ttyUSB3: usb_wwan_open: submit read urb 2 failed: -19
[ 52.147241] option1 ttyUSB3: usb_wwan_open: submit read urb 3 failed: -19
[ 52.161659] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 52.162309] option 1-1.2:1.4: device disconnected
[ 52.168233] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 52.168840] option 1-1.2:1.5: device disconnected
[ 52.173536] option1 ttyUSB3: GSM modem (1-port) converter now disconnected from ttyUSB3
[ 52.178163] option 1-1.2:1.3: device disconnected
[ 53.028446] usb 1-1.2: new high-speed USB device number 14 using sunxi-ehci
[ 53.150437] usb 1-1.2: New USB device found, idVendor=2ecc, idProduct=3004
[ 53.150466] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 53.150486] usb 1-1.2: Product: Arom Usb Boot Port
[ 53.150505] usb 1-1.2: Manufacturer: ASR Microelectronics
[ 53.150524] usb 1-1.2: SerialNumber: arom0123456789
[ 53.822783] usb 1-1.2: USB disconnect, device number 14
[ 58.216456] usb 1-1.2: new high-speed USB device number 15 using sunxi-ehci
[ 58.327579] usb 1-1.2: New USB device found, idVendor=1e0e, idProduct=9011
[ 58.327606] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 58.327627] usb 1-1.2: Product: A76XX Series LTE Module
[ 58.327646] usb 1-1.2: Manufacturer: SIMCom Wireless Solution
[ 58.327666] usb 1-1.2: SerialNumber: 200806006809080000
[ 58.347485] option 1-1.2:1.2: GSM modem (1-port) converter detected
[ 58.351275] usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 58.355949] option 1-1.2:1.4: GSM modem (1-port) converter detected
[ 58.359313] usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 58.364524] option 1-1.2:1.5: GSM modem (1-port) converter detected
[ 58.367472] usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 58.374815] option 1-1.2:1.3: GSM modem (1-port) converter detected
[ 58.377069] usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB3
[ 60.090656] usb 1-1.2: USB disconnect, device number 15
[ 60.107607] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 60.108804] option 1-1.2:1.2: device disconnected
[ 60.123590] option1 ttyUSB2: usb_wwan_open: submit int urb failed: -19
[ 60.123612] option1 ttyUSB2: usb_wwan_open: submit read urb 0 failed: -19
[ 60.123627] option1 ttyUSB2: usb_wwan_open: submit read urb 1 failed: -19
[ 60.123642] option1 ttyUSB2: usb_wwan_open: submit read urb 2 failed: -19
[ 60.123656] option1 ttyUSB2: usb_wwan_open: submit read urb 3 failed: -19
[ 60.123702] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 60.124142] option 1-1.2:1.4: device disconnected
[ 60.137440] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 60.139600] option 1-1.2:1.5: device disconnected
[ 60.143168] option1 ttyUSB3: GSM modem (1-port) converter now disconnected from ttyUSB3
[ 60.143309] option 1-1.2:1.3: device disconnected
[ 60.964430] usb 1-1.2: new high-speed USB device number 16 using sunxi-ehci
[ 61.085908] usb 1-1.2: New USB device found, idVendor=2ecc, idProduct=3004
[ 61.085934] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 61.085954] usb 1-1.2: Product: Arom Usb Boot Port
[ 61.085974] usb 1-1.2: Manufacturer: ASR Microelectronics
[ 61.085993] usb 1-1.2: SerialNumber: arom0123456789
[ 61.761205] usb 1-1.2: USB disconnect, device number 16
[ 66.136439] usb 1-1.2: new high-speed USB device number 17 using sunxi-ehci
[ 66.247613] usb 1-1.2: New USB device found, idVendor=1e0e, idProduct=9011
[ 66.247641] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 66.247662] usb 1-1.2: Product: A76XX Series LTE Module
[ 66.247681] usb 1-1.2: Manufacturer: SIMCom Wireless Solution
[ 66.247700] usb 1-1.2: SerialNumber: 200806006809080000
[ 66.270973] option 1-1.2:1.2: GSM modem (1-port) converter detected
[ 66.277002] usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 66.281230] option 1-1.2:1.4: GSM modem (1-port) converter detected
[ 66.284303] usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 66.289263] option 1-1.2:1.5: GSM modem (1-port) converter detected
[ 66.291381] usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 66.295145] option 1-1.2:1.3: GSM modem (1-port) converter detected
[ 66.297627] usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB3
[ 68.037940] usb 1-1.2: USB disconnect, device number 17
[ 68.047733] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 68.056446] option 1-1.2:1.2: device disconnected
[ 68.058173] option1 ttyUSB1: usb_wwan_open: submit int urb failed: -19
[ 68.058204] option1 ttyUSB1
: usb_wwan_open: submit read urb 0 failed: -19
[ 68.058226] option1 ttyUSB1: usb_wwan_open: submit read urb 1 failed: -19
[ 68.058247] option1 ttyUSB1: usb_wwan_open: submit read urb 2 failed: -19
[ 68.058267] option1 ttyUSB1: usb_wwan_open: submit read urb 3 failed: -19
[ 68.066215] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 68.066434] option 1-1.2:1.4: device disconnected
[ 68.071041] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 68.071709] option 1-1.2:1.5: device disconnected
[ 68.077020] option1 ttyUSB3: GSM modem (1-port) converter now disconnected from ttyUSB3
[ 68.078138] option 1-1.2:1.3: device disconnected
[ 68.896437] usb 1-1.2: new high-speed USB device number 18 using sunxi-ehci
[ 69.018565] usb 1-1.2: New USB device found, idVendor=2ecc, idProduct=3004
[ 69.018593] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 69.018613] usb 1-1.2: Product: Arom Usb Boot Port
[ 69.018633] usb 1-1.2: Manufacturer: ASR Microelectronics
[ 69.018651] usb 1-1.2: SerialNumber: arom0123456789