Bernard Johnson wrote:
Aaron J Albright wrote:

Please ensure you are using the latest firmware for your 2840.  I've
tested the Color LaserJet 2840 using both ethernet and usb with faxing
and have been able to use it with no issues in the past.  You can verify
your firmware by going to reports, then config report.


I'm using 20050901 which is the latest listed on the HP site
http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareIndex.jsp?lang=en&cc=us&prodNameId=445197&prodTypeId=18972&prodSeriesId=445194&swLang=8&taskId=135&swEnvOID=2020

By the way, I'm talking about the communication between hp-sendfax (in
device.py) and hpiod (in device.cpp).



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Yes, but the _underlying_ problem is a communication problem, not an error in the code. We exaimined your patch, and it doesn't address the actual problem you are seeing (actually, the existing code in device.cpp is correct - no channel-id is supposed to be returned if an I/O error occurs. The fact that device.py may not handle this as gracefully as it could is another issue.)

So, we need to determine what the real cause is. As Aaron has said, we have tested extensively with this device (using the most up to date firmware), and it works OK. So, the question is what else could be causing this? Could you try using a USB connection?

-Don







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