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Hi. Prolific USB/RS232 adapters have some issues apparently. I also bought three and connected them to three satellite modems. Two modems worked fine, the third one only receives characters from the adapter. Absolutely no issues with other adapter brands. Try to connect it to a different peripheral. R. From: wawan_wiratno <> To: Sent: Wednesday, July 11, 2012 5:19 AM Subject: [ts-7000] serial USB syntek prolific not work ts-7558 Hi All,
I just got my board ts-7558 every thinks works fine except usb serial driver. I have GSM modem which is use prolific driver. ts7500:~# lsusb Bus 002 Device 028: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port Bus 002 Device 001: ID 0000:0000 Bus 001 Device 001: ID 0000:0000 ts7500:~# dmesg | grep ttyUSB [ 2043.130000] usb 2-1: generic converter now attached to ttyUSB0 [ 2277.500000] usb 2-2: generic converter now attached to ttyUSB1 [ 2280.130000] generic ttyUSB0: generic converter now disconnected from ttyUSB0 [ 2446.250000] generic ttyUSB1: generic converter now disconnected from ttyUSB1 [ 2448.770000] usb 2-1: generic converter now attached to ttyUSB0 [ 2659.500000] generic ttyUSB0: generic converter now disconnected from ttyUSB0 [ 5050.990000] usb 2-1: generic converter now attached to ttyUSB0 [ 5513.820000] generic ttyUSB0: generic converter now disconnected from ttyUSB0 [ 6014.740000] usb 2-1: generic converter now attached to ttyUSB0 [ 6094.300000] generic ttyUSB0: generic converter now disconnected from ttyUSB0 [ 6200.240000] usb 2-1: generic converter now attached to ttyUSB0 ts7500:~# lsmod Module Size Used by ftdi_sio 20168 0 usbserial 19056 1 ftdi_sio smsc9500 56484 0 smscusbnet 16396 1 smsc9500 g_ether 17744 0 str8100_udc 13572 1 g_ether ohci_hcd 14372 0 sd_mod 15504 0 usb_storage 23072 0 scsi_mod 55372 2 sd_mod,usb_storage ehci_hcd 22028 0 usbcore 74300 7 ftdi_sio,usbserial,smsc9500,smscusbnet,ohci_hcd,usb_storage,ehci_hcd all driver and modules load correctly but when I used minicom to test the modem, it initialize forever, stuck tried using manual echo "AT \015" > /dev/ttyUSB0 nothing happened baudrate and all serial setting already correct so, where I do I missed? Please Help Br Wawan __._,_.___
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