Red Hat Bugzilla – Bug 138128
Belkin USB to Serial Adapter does not work correctly
Last modified: 2015-01-04 17:11:37 EST
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.3) Gecko/20040922 Description of problem: I have been using a USB-Serial adapter to connect my computer to a palm pilot. Recently I switched adapters to a Belkin USB to Serial adapter and have been unable to connect to my palm pilot. I am fairly certain it is a problem with the driver as the configuration worked previously with another adapter (i.e. it is the only thing that has changed). I have tried all the obvious tests and am willing to debug the problem if someone can explain to me how I do that. The kernel recognizes the adapter when it is inserted, loads the mct_u232 driver (even though there is a belkin_sa driver which would be the obvious choice) and puts the adapter on ttyUSB0. # dmesg usb 2-1: new full speed USB device using address 3 mct_u232 2-1:1.0: Magic Control Technology USB-RS232 converter detected usb 2-1: Magic Control Technology USB-RS232 converter now attached to ttyUSB0 # lsusb Bus 004 Device 001: ID 0000:0000 Bus 003 Device 001: ID 0000:0000 Bus 002 Device 003: ID 050d:0109 Belkin Components F5U109 PDA Adapter Bus 002 Device 001: ID 0000:0000 Bus 001 Device 005: ID 046d:c00e Logitech, Inc. Optical Mouse Bus 001 Device 004: ID 0518:0001 EzKEY Corp. Bus 001 Device 003: ID 0409:0058 NEC Corp. HighSpeed Hub Bus 001 Device 001: ID 0000:0000 # more /proc/bus/usb/devices ... T: Bus=02 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 3 Spd=12 MxCh= 0 D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=16 #Cfgs= 1 P: Vendor=050d ProdID=0109 Rev= 1.02 S: Manufacturer=Belkin USB PDA Adapter S: Product=Belkin Components S: SerialNumber=271806 C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr=100mA I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=mct_u232 E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=2ms E: Ad=82(I) Atr=03(Int.) MxPS= 64 Ivl=1ms E: Ad=02(O) Atr=02(Bulk) MxPS= 16 Ivl=0ms When I try to sync with my palm pilot, the LEDs indicate that there is communication from the palm pilot, but not from the computer. Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1.insert the Belkin USB-Serial adapter 2.try to sync with palm pilot 3. Actual Results: Nothing happens Expected Results: gpilot should recognize the sync operation and synchronize with palm pilot. Additional info: Willing to debug if someone can give me some suggestions.
Well, I have figured out how to make it work, but there is definitely a bug somewhere, just not sure where. First I had to drop the baud rate down to a maximum of 38400. Second, I have to first use pilot-xfer to make contact before attempting to use gpilot to synchronize and then I need to try gpilot twice to actually get it to work. It is strange that pilot-xfer should work and gpilot not since I thought gpilot was a child of pilot-xfer. So, the steps are: 1) Set baud rate to 38400 2) run "pilot-xfer --list" 3) open gpilot and try to synch. This appears to always fail. 4) Try synch again. This should work. Strange, but not sure where the bug lies.
I have also noticed the following error sometimes occur when this device is inserted, particularly when it is connected to a USB hub: drivers/usb/serial/mct_u232.c: usb_submit_urb(read bulk) failed
Fedora Core 2 has now reached end of life, and no further updates will be provided by Red Hat. The Fedora legacy project will be producing further kernel updates for security problems only. If this bug has not been fixed in the latest Fedora Core 2 update kernel, please try to reproduce it under Fedora Core 3, and reopen if necessary, changing the product version accordingly. Thank you.