I have HP laser 1020 – doesn’t work in Tumbleweed. I’m going to revert to 11.4 clean install and take it slowly up, see if I can sort that out. But that of course won’t help you. At least my experience together with yours points to a likely bug. My current kernel is 2.6.39-30.1 and hplip 3.11.1-6.1 (which I junked to try the individual driver from the net).
I tested it again on a different computer with the same result
I use the 64 bit version of Opensuse 11.4 and tried HPLIP version 3.11.5-32.1 and 3.11.5-1.3.1.
HP printer Photosmart B109n
I did two options:
Remove the USB from the printer, power off the printer and reinsert the cable again → No problems
With the calble connected i power off the printer and then i See kernel errors as shown in the image.