Comment 1 for bug 403052

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Stefan Dösinger (stefandoesinger) wrote : Re: HP Laserject CP1215 yellow not aligned usihttps://launchpad.net/hplip/+filebug#form-startng HPLIP

I also see this problem. The Yellow color is shifted about 1 millimeter down. All other planes match properly. Google brings up a number of similar postings on other websites, so this seems to be a common problem.

What is interesting is that this occurs with some Windows driver versions as well.

-> The driver that shipped on the CD works fine. So the hardware is ok
-> Foo2hp doesn't work for me either. Additionally it has a number of other problems, hplip works much better.
-> The newest windows driver produces the same bug(via network print)
-> It seems that using the CD driver and printing to the printer via a samba share has the yellow color incorrectly aligned too.

The last point seems strange. Samba prints an octet stream, so it just forwards the data generated from the Windows driver(which works on a direct USB connection) 1:1 to the printer. I don't see how it can shift one color plane without making the whole printout unrecognizeable garbage. I'll have to do more investigation here. Maybe the printer returns some alignment info to the driver via USB?

I tried updating the firmware and calibrating the printer(via the Windows tools), nothing helped. I believe the printer hardware is OK.

The simplest fix is probably adding some extra filter to the cups filter chain that shifts the yellow plane a bit. I am a programmer myself, but I have no idea how the cups filter work(and little time), so don't wait for me to implement such a fix.