I have been trying to set up the colour on an HP Deskjet 840c printer. Normally I just print out text so up until now it has not been an issue.
I have only recently moved from KDE 3.10 and although the colour was not perfect it was acceptable. However under KDE 4.9.2 the colour appear to completely wrong when I print images embedded in a LibreOffice Writer document, and I when I print out web pages it prints part of it twice as shown below.
The test page from CUPS appears to be OK. And if I convert writer documents to PDF and print via GIMP using Gutenberg the print is better but still a little dark.
Below is the output as suggested by Wedgetail
[user@localhost ~]$ ls -l /etc/cups/ppd/
-rw-r--r-- 1 root root 20940 Sep 18 22:31 Cups-PDF.ppd
-rw-r--r-- 1 root root 15247 Dec 19 19:59 DESKJET_840C.ppd
[user@localhost ~]$ lpstat -t
scheduler is running
no system default destination
device for Cups-PDF: cups-pdf:/
device for DESKJET_840C: hp:/par/DESKJET_840C?device=/dev/parport0
Cups-PDF accepting requests since Tue 18 Dec 2012 16:10:56 GMT
DESKJET_840C accepting requests since Wed 19 Dec 2012 19:59:25 GMT
printer Cups-PDF is idle. enabled since Tue 18 Dec 2012 16:10:56 GMT
printer DESKJET_840C is idle. enabled since Wed 19 Dec 2012 19:59:25 GMT
[user@localhost ~]$ lpinfo -v
Any pointers as to why the colour is wrong.