On Thu, Jan 24, 2008 at 01:31:03PM -0500, Jon Lewis wrote: > Looking for a smaller (short cord, db9) USB/Serial converter, I just bought > one of these: > > http://www.newegg.com/Product/Product.aspx?Item=N82E16812203018 > (KINAMAX 1 FT USB to Serial DB9 (9 pin) RS232 Cable Model CB-RS232 - > Retail) > though it looks like they actually sent > http://www.newegg.com/Product/Product.aspx?Item=N82E16812156003 > (SABRENT SBT-USC1K USB to Serial (9-pin) DB-9 RS-232 Adapter Cable - > Retail) > > I bought it to use with an Asus Eee running the default Linux OS (2.6.21 > based kernel). When plugged in, it's detected as: > > [ 7517.340000] usb 2-2: new full speed USB device using uhci_hcd and > address 2 > [ 7517.490000] usb 2-2: configuration #1 chosen from 1 choice > [ 7517.580000] drivers/usb/serial/usb-serial.c: USB Serial support > registered for pl2303 > [ 7517.580000] pl2303 2-2:1.0: pl2303 converter detected > [ 7517.580000] usb 2-2: pl2303 converter now attached to ttyUSB1 > [ 7517.580000] usbcore: registered new interface driver pl2303 > [ 7517.580000] drivers/usb/serial/pl2303.c: Prolific PL2303 USB to serial > adaptor driver > > In this case, it's ttyUSB1 because I have another adaptor (using the > mct_u232 driver currently plugged in). The problem I'm having is that the > pl2303 based adaptor "comes and goes". Sometimes it will disconnect > immediately after the driver loads. Sometimes it works for a while and > then disconnects. Sometimes it'll reconnect so fast, it'll initially > connect as ttyUSB0, disconnect and reconnect and become ttyUSB1. More > often, after it's disconnected, I have to physically remove and reconnect > it to get it back.
Sounds like a bad device and/or connection. Try returning it and getting another one. > It's still physically connected during all the messages above. So the > question is, is this a driver problem or bad USB/Serial converter, or one > that just doesn't quite get alonng with the pl2303 driver? I think this is a bad device, the driver can not disconnect the device from the USB port :) good luck, greg k-h - To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
