Jan 08 23:07:37 karnak hp[4967]: io/hpmud/musb.c 981: invalid bulk out endpoint
Unfortunately i don't print that often, but a simple downgrade of hplip to 3.12.10a-3 and libusbx to libusbx 1.0.12-2 (while i'm sure printing has worked after "2012-09-30 upgpkg: libusbx 1.0.14-1" and i'm actually quite sure it has worked with that hplip version) didn't help, so i wonder whether even the kernel may be involved.
(and yes, hplip-plugin 3.12.11-1 is installed)
There's also https://bugs.launchpad.net/hplip/+bug/1093312 which basically matches my observations (while this is an i686 installation here) though does not mention "does not print at all"
-> Can anyone here actually print on current hplip/usb?
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