Printer only works in 600 dpi
I have a Samsung (i.e cheap) laser printer connected to the parallel port of a Redhat 9 machine.
I installed the printer drivers using the KDE printer wizard. The printer works fine (test pages print, Open Office prints etc) if I print at 600 dpi. However, if I print at any lower resolution (such as 300 dpi) the printing looks terrible. Bit difficult to describe what happens on the other resolutions, but if for example I try to print just the word "Test" in a new document, The word Test prints twice in faintly and then there are black bands printing down the page. The black bands are about 1 cm thick and 1 cm apart (about 0.4 inches).
I searched on linuxprinting.org and google and couldn't find this particular problem. As far as I can tell from my searching this Samsung model (ML-1210) should work fine at 300 dpi as well as 600 under linux.
Many thanks for your help.