Hi, 

Here is some more info on this that might help someone. Note that I was 
previously using SUSE 9.3 and am now using SUSE 10.1.

The Serial Port number was increased because I had a link to /dev/ttyUSB0 
/dev # ls -als | grep USB
0 lrwxrwxrwx   1 root  root        12 2006-11-28 10:44 pilot -> /dev/ttyUSB0
0 crw-rw----   1 root  uucp  188,   0 2006-11-27 16:12 ttyUSB0

When the USB Serial port cable is unplugged and re-inserted then it (usbfs) 
would create a new device /dev/ttyUSB1, however, if the USB Serial cable is 
removed then this new device disappears. Therefore, I guessed 
that /dev/ttyUSB0 is not being removed because it is in use, or appears to be 
because of the link. Removal of the link to /dev/ttyUSB0 fixed the problem. 

Note that to get Kpilot to work, it must be pointed directly to /dev/ttyUSB0. 

Now with kpilotdeamon running in the background the /dev/ttyUSB0 does not 
disappear. After, killing the kpilotdeamon the /dev/ttyUSB0 disappeared and 
then on reinserting the USB Serial Port device was mapped to /dev/ttyUSB0 
again. 

So, the key here is that when a USB device is removed then the associated 
application or deamon must be stopped or atleast stop using the device, so 
that the usbfs can remove the device. In order for this to happen the 
application or deamon must be given a message from the usbfs that the device 
has been removed and therefore to release the device. 

Would it be possible to improve the system to make this more user friendly?

Thanks,


On Friday 03 March 2006 00:54, Bruce Samhaber wrote:
> Hi,
>
> I am using a USB to Serial port cable. Initially when I start the computer
> and linux then insert the USB Serial port cable the device is set
> as /dev/ttyUSB0.  If the USB Serial Port cable is removed then reinserted
> it becomes /dev/ttyUSB1. Each time the USB Port cable is removed then
> reinserted the device name is increased by one.
>
> It appears to me that upon removeal of the device that SUSE Plugger is no
> removeing the device from the device list.
>
> Has anyone seen this problem?
> Does anyone have any suggestions to fix this?
>
> Thanks,
>
>
>
> --
> Bruce Samhaber
> Senior Hardware Design Consultant
> Tel: 613-724-5987             112 Kenora St.
> Fax: 613-724-5987             Ottawa, Ontario
> Cel: 613-297-6961             K1Y 3L1
> mailto: [EMAIL PROTECTED]     http://www3.sympatico.ca/marypat/

-- 
Bruce Samhaber
Senior Hardware Design Consultant
Tel: 613-724-5987               112 Kenora St. 
Fax: 613-724-5987               Ottawa, Ontario
Cel: 613-297-6961               K1Y 3L1
mailto: [EMAIL PROTECTED]       http://www3.sympatico.ca/marypat/
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