Greg,
 Did you receive this test email? I wrote a reply to your email to me / 
the list and it bounced from the list and I wasn't sure why, I wrote the 
list admin but it said he is on vacation in the uk. :) I signed up with 
my work address so I can still post, but anyway, to say the least a bit 
of an adventure. :)

 Let me know if you get this at least, and as well I am copying the list 
as a test email. I am guessing it won't get through. For some reason it 
seems to be labeling me as spam??

thanks again

Nick

"All unix, all the time."

http://npt.ath.cx


Greg KH wrote:
> On Wed, Dec 27, 2006 at 01:38:52PM -0600, nick thompson wrote:
>   
>> Hi,
>>  Basically, in a nutshell, if I cat a text file to /dev/ttyS0, and have
>> a null modem setup going to /dev/ttyUSB0 (the pl2303x) the first time I
>> cat it, it goes through fine. However, the 2nd and 3rd etc it is missing
>> the first two characters. If anyone has any clues, or if there is
>> anything I can change in pl2303.c or usb-serial.c that would help here,
>> I would love to hear about it.
>>     
>
> Try it with a "real" serial based program, like minicom.  'cat' and
> 'echo' don't always play nice with the usb-serial drivers which
> sometimes do unfun things like reset line settings for every time the
> port is opened.
>
> Also, load the pl2303 driver in debug mode:
>       modprobe pl2303 debug=1
> and look at the kernel log output when you send characters to it.  It
> should show you the raw data going over the line to the device to help
> you determine if it's a device or driver issue.
>
> oh, and the driver was reversed engineered and then later Prolific took
> a copy of it and placed it on their web site.  Last time I looked, the
> version on their site was very out of date and contained numerous bugs
> and features missing.
>
> good luck,
>
> greg k-h
>
>   


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