Comment 2 for bug 777271

Ok, I think I've found the problem.

The problem is the new Universal Printer Driver from Samsung, which you can install for all Samsung printers nowadays.
When you install this driver on a Windows machine (tested with XP x86 and 7 x64), then printing will fail to the Samsung printer attached to a Linux server running CUPS and sharing the printer via the Samsba protocol. The job gets processed by CUPS, and CUPS shows it as completed. Apparently it has received the document to print as well, but the printer will only make noise but not print.

Now, to fix this you must be lucky if Samsung has provided older Windows drivers in the past, because with those older specific drivers installed the printing job will actually take place!! Samsung supplies all versions of their drivers on their website, so if it exists, you'll find a working driver on the website.

Unfortunately, no such drivers exist for the ML-1910, so I brought that one back to the shop and swapped it for an ancient model (ML-2510). With the Universal Printer Driver installed on the Windows machines, exactly the same problem occurred, but there are older drivers that I tested and they work flawlessly.

So Samsung has written their latest and greatest drivers not correctly. I'm not sure if any modification of CUPS would fix this, but I'm willing to test if someone wants anything tested.