HI 各位大大
目前有一個問題 3G 網卡上網產生流量時例如觀看線上影片
USB裝置會不定時斷線 也就是ttyACM會被Disconnect 在connect
這時ttyACM0 就無法在下ATcommand 了 導致3G網卡就此斷線
kernel 是3.2
Android:4.2
dmesg 訊息為
<3>[ 5978.217895] init: sys_prop: permission denied uid:1001 name:net.interfaces.defaultroute
<4>[ 6373.048767] jason---acm_tty_close
<4>[ 6373.052368] jason----tty_port_close_start
<4>[ 6390.900177] jason---acm_tty_close
<4>[ 6390.903839] jason----tty_port_close_start
<4>[ 6397.593231] jason---acm_tty_close
<4>[ 6397.597381] jason----tty_port_close_start
<4>[ 6397.601684] tty_port_close_start: tty->count = 1 port count = 0.
<4>[ 6397.825378] jason--1
<4>[ 6397.828704] jason---usb_disconnect
<6>[ 6397.832427] usb 1-1.1: USB disconnect, device number 3
<4>[ 6398.081665] jason--1
<6>[ 6398.403045] usb 1-1.1: new high-speed USB device number 4 using musb-hdrc
<6>[ 6398.531768] usb 1-1.1: New USB device found, idVendor=1546, idProduct=1102
<6>[ 6398.539062] usb 1-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
<6>[ 6398.546722] usb 1-1.1: Product: u-blox Wireless Module
<6>[ 6398.552093] usb 1-1.1: Manufacturer: u-blox
<6>[ 6398.556488] usb 1-1.1: SerialNumber: 358901042067626
<3>[ 6398.587341] cdc_acm 1-1.1:1.0: This device cannot do calls on its own. It is not a modem.
<6>[ 6398.596527] cdc_acm 1-1.1:1.0: ttyACM0: USB ACM device
<3>[ 6398.627716] cdc_acm 1-1.1:1.2: This device cannot do calls on its own. It is not a modem.
<6>[ 6398.636871] cdc_acm 1-1.1:1.2: ttyACM1: USB ACM device
<3>[ 6398.646392] cdc_acm 1-1.1:1.4: This device cannot do calls on its own. It is not a modem.
<6>[ 6398.655578] cdc_acm 1-1.1:1.4: ttyACM2: USB ACM device
<3>[ 6398.671508] cdc_acm 1-1.1:1.6: This device cannot do calls on its own. It is not a modem.
<6>[ 6398.680816] cdc_acm 1-1.1:1.6: ttyACM3: USB ACM device
<3>[ 6398.690277] cdc_acm 1-1.1:1.8: This device cannot do calls on its own. It is not a modem.
<6>[ 6398.699493] cdc_acm 1-1.1:1.8: ttyACM4: USB ACM device
<3>[ 6398.721527] cdc_acm 1-1.1:1.10: This device cannot do calls on its own. It is not a modem.
<6>[ 6398.730926] cdc_acm 1-1.1:1.10: ttyACM5: USB ACM device
<3>[ 6398.740844] cdc_acm 1-1.1:1.12: This device cannot do calls on its own. It is not a modem.
<6>[ 6398.750244] cdc_acm 1-1.1:1.12: ttyACM6: USB ACM device
請各位大大 幫忙 謝謝
