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Dopo lunga fatica, ho capito che il problema è nel driver di PL2303 ovvero usbserial adapter, cosa piu´ curiosa non riesco in alcun modo a caricare tale driver vi posto gli output:
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<BR>dmesg|grep usb
<BR>usb.c: registered new driver usbdevfs
<BR>usb.c: registered new driver hub
<BR>usb.c: new USB bus registered, assigned bus number 1
<BR>usb.c: USB device 2 (vend/prod 0x8086/0x110) is not claimed by any active driver.
<BR>usb.c: USB device 3 (vend/prod 0x67b/0x2303) is not claimed by any active driver.
<BR>usb.c: registered new driver spca50x
<BR>drivers/usb/spca50x.c: USB SPCA5XX camera found. Type Intel Easy PC Camera CS110 (SPCA508+PB100)
<BR>drivers/usb/spca50x.c: [spca50x_probe:7279] Camera type YUVY
<BR>drivers/usb/spca50x.c: spca5xx driver 0.51 registered
<BR>usb.c: registered new driver serial
<BR>usbserial.c: USB Serial support registered for Generic
<BR>usbserial.c: USB Serial Driver core v1.4
<BR>usbserial.c: USB Serial support registered for PL-2303
<BR>usbserial.c: PL-2303 converter detected
<BR>usbserial.c: PL-2303 converter now attached to ttyUSB0 (or usb/tts/0 for devfs)
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<BR>modprobe usbserial vendor=0x067b product=0x2303
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<BR>cat /var/log/messages|grep usb
<BR>Dec 20 01:13:11 darkstar kernel: usb.c: registered new driver serial
<BR>Dec 20 01:13:11 darkstar kernel: usbserial.c: USB Serial support registered for Generic
<BR>Dec 20 01:13:11 darkstar kernel: usbserial.c: USB Serial Driver core v1.4
<BR>Dec 20 01:13:11 darkstar kernel: usbserial.c: USB Serial support registered for PL-2303
<BR>Dec 20 01:13:11 darkstar kernel: usbserial.c: PL-2303 converter detected
<BR>Dec 20 01:13:11 darkstar kernel: usbserial.c: PL-2303 converter now attached to ttyUSB0 (or usb/tts/0 for devfs)
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<BR>se qualcuno di voi ha qualche idea indicazione perchè non so piu´ cosa fare, quando mi connetto la linea cade subito.
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Risolto il tutto con kernel 2.6.7 era un problema del driver pl2303.
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<BR>usbcore: registered new driver pl2303
<BR>drivers/usb/serial/pl2303.c: Prolific PL2303 USB to serial adaptor driver v0.10
<BR>usb 1-2: USB disconnect, address 3
<BR>usb 1-2: new full speed USB device using address 4
<BR>usbserial 1-2:1.0: PL-2303 converter detected
<BR>usb 1-2: PL-2303 converter now attached to ttyUSB1 (or usb/tts/1 for devfs)
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