Dear all, I have a very strange behavior of my USB to SERIAL cable for mobile phone NOKIA 6020. It is connected to my PC with Fedora Core 4.0 kernel 2.6.14-1.1637_FC4. The cable is properly recognized during boot see messages:
Nov 23 20:44:52 localhost kernel: usbcore: registered new driver usbserial Nov 23 20:44:52 localhost kernel: drivers/usb/serial/usb-serial.c: USB Serial support registered for Generic Nov 23 20:44:52 localhost kernel: usbcore: registered new driver usbserial_generic Nov 23 20:44:52 localhost kernel: drivers/usb/serial/usb-serial.c: USB Serial Driver core v2.0 Nov 23 20:44:52 localhost kernel: drivers/usb/serial/usb-serial.c: USB Serial support registered for PL-2303 Nov 23 20:44:52 localhost kernel: pl2303 2-2:1.0: PL-2303 converter detected Nov 23 20:44:52 localhost kernel: usb 2-2: PL-2303 converter now attached to ttyUSB0 Nov 23 20:44:52 localhost kernel: usbcore: registered new driver pl2303 Nov 23 20:44:52 localhost kernel: drivers/usb/serial/pl2303.c: Prolific PL2303 USB to serial adaptor driver v0.12 Nov 23 20:44:52 localhost kernel: usbcore: registered new driver yealink Nov 23 20:44:52 localhost kernel: drivers/usb/input/yealink.c: Yealink phone driver:yld-20050816 But then, after each 10 to 90 minutes happens this see dmesg: hub 2-0:1.0: port 2 disabled by hub (EMI?), re-enabling... usb 2-2: USB disconnect, address 2 PL-2303 ttyUSB0: PL-2303 converter now disconnected from ttyUSB0 pl2303 2-2:1.0: device disconnected usb 2-2: new full speed USB device using uhci_hcd and address 3 pl2303 2-2:1.0: PL-2303 converter detected usb 2-2: PL-2303 converter now attached to ttyUSB0 hub 2-0:1.0: port 2 disabled by hub (EMI?), re-enabling... usb 2-2: USB disconnect, address 3 PL-2303 ttyUSB0: PL-2303 converter now disconnected from ttyUSB0 pl2303 2-2:1.0: device disconnected usb 2-2: new full speed USB device using uhci_hcd and address 4 pl2303 2-2:1.0: PL-2303 converter detected usb 2-2: PL-2303 converter now attached to ttyUSB0 hub 2-0:1.0: port 2 disabled by hub (EMI?), re-enabling... usb 2-2: USB disconnect, address 4 PL-2303 ttyUSB0: PL-2303 converter now disconnected from ttyUSB0 pl2303 2-2:1.0: device disconnected usb 2-2: new full speed USB device using uhci_hcd and address 5 pl2303 2-2:1.0: PL-2303 converter detected usb 2-2: PL-2303 converter now attached to ttyUSB0 And sometimes it changes the device name from ttyUSB0 to ttyUSB1 and then sometimes back from ttyUSB1 to ttyUSB0, then I don't know which device could be used for my application communicating with this mobile phone. And it of course freezes. Do you have any clue, why it behaves like that? And what can I do against that ? And now for some strange reason, the /dev/ttyUSB is not created ? And I can't do anything with that. Thank you for any help. Zdenek ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://ads.osdn.com/?ad_id=7637&alloc_id=16865&op=click _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
