a133 连接 4G 模块时断时续

[liangzhicheng]

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

[liangzhicheng]

更改内核的同时将文件系统更改为了 ubuntu18.04，将文件系统改回 sdk 提供的就正常了，也能拨号上网。。。

问题出在 ubuntu

[liangzhicheng]

问题已确认，ubuntu有个modem管理，/usr/sbin/ModemManager 会去管理4G模块，grep 发现里面有 option1 的操作，赶时间简单粗暴直接删除就可以了