[SOLVED] Network Printer prints garbage after CUPS upgrade

[andyboeh]

I have an ALARM system running CUPS with a USB printer connected. The USB printer is shared as a local RAW printer to CUPS clients. All systems were running CUPS 1.6.3 and were working fine.

A few days ago, I finally decided to upgrade to CUPS 1.7.1. Unfortunately, now my printer only prints garbage. If I downgrade to 1.6.3, it works again. CUPS 1.7.1 as client with 1.6.3 on the server doesn't work, either, so I suspect the client side to be somewhat broken.

The printer is a HP LaserJet 3310, connected via USB. On the clients, the HP LaserJet 3300 PostScript driver was used, but selecting the PCL driver doesn't change the problem. I turned on debug-logging (on the client), the job runs through the hpcups filter without errors.

Does anybody have any suggestions?

[WarheadsSE]

If the clients previously used it as a RAW, and were using hpcups client side, then I would be double checking the server and not the client, since it seems the server is now doing something different. See if it suddenly has started using a filter it was not previously.

[andyboeh]

$this->bbcode_second_pass_quote('WarheadsSE', 'I')f the clients previously used it as a RAW, and were using hpcups client side, then I would be double checking the server and not the client, since it seems the server is now doing something different. See if it suddenly has started using a filter it was not previously.

[WarheadsSE]

Yeah, this does sound like it is not handling it right @ the client side if you still have to filter it through hpcups @ the server.

[andyboeh]

After a lot of searching the web I found the problem:

CUPS 1.7 enables compression by default, which is not uncompressed at the server.

Modifying the URL as follows fixed the problem:
$this->bbcode_second_pass_code('', 'ipp://hostname:631/printers/raw?compression=none')

[WarheadsSE]

Awesome. Viola.