Created attachment 840647 [details] working ppd from Opensuse Even though I switch to grayscale printing, the page is printed in color anyway. The hp-color_laserjet_mfp_m278-m281-ps.ppd file seems to be faulty as described in the bug report for arch: https://bugs.archlinux.org/task/73158 " A notable difference, in fact the one that breaks my workflow is that the *HPPJLColorAsGray strings are both "%%" either for the True and the False case in the arch version of the file, while in ubuntu the string for the True case is a PJL command "@PJL SET GRAYSCALE=COMPOSITE<0A>" " workaround: I loaded the ppd from 'OpenSuSE Leap 15.3 for x86_64' (hplip-3.20.11-2.1.x86_64.rpm) and am now able to switch between color and black. Due to the high costs of cymk-cartridges I've chosen major serverity.
(I'll add 'PATCH' as a keyword as it's close enough.)
