[cups-devel] Communication between IPP printer and "ipp" CUPS backend

[Kennedy, Smith (Wireless Architect)]

Hi Till,

I've asked some of the firmware folks to take a look at it.  (I don't work in printer firmware.)  When I've heard back I'll let you know.

Thanks for your patience,
Smith

/**
    Smith Kennedy
    Wireless Architect - Client Software - IPG-PPS
    Standards - PWG / Bluetooth SIG / Wi-Fi Alliance / NFC Forum
    HP Inc.
*/



> On 2015-09-21, at 1:53 PM, Till Kamppeter <till.kamppeter at gmail.com> wrote:
> 
> Smith, did you get my e-mail? Did you already have a look into my files?
> 
>   Till
> 
> On 09/16/2015 04:34 PM, Till Kamppeter wrote:
>> On 09/15/2015 09:32 PM, Kennedy, Smith (Wireless Architect) wrote:
>>> Hi Till,
>>> 
>>> Sorry for not replying earlier. Would you have any USB traces from
>>> Wireshark or a Beagle protocol analyzer, or logs, and/or the
>>> corresponding document files, so that we could try to repro it
>>> internally?
>>> 
>>> Smith
>> 
>> As the problem always occurs after 4 or 5 successful jobs (all the jobs
>> being the same one) after turning on the printer, it seems that some
>> data is accumulating in some buffer of the printer which runs full after
>> a certain amount of activity making the printer blocking.
>> 
>> Perhaps it is data which the printer tries to send to the client without
>> being an answer to a request from the client but sent spontaneously by
>> the printer. ippusbxd does not pick up such data from the printer as it
>> waits for data from the printer only as an answer to a request which it
>> has sent.
>> 
>>    Till
>> 
>> 
>