On Thu, 24 Nov 2005, Zdenek Habala wrote: > 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:
> 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 > Do you have any clue, why it behaves like that? And what can I do against > that ? This happens because of noise in the USB data lines. The noise could be a result of electromagnetic interference (EMI), bad cables, bad connectors, bad terminations, or several other things. Alan Stern ------------------------------------------------------- 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 _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
