This certainly is not Trinity related but as this list is full of experienced 
people...

For some time (I *think* since I moved to Debian 9 but not sure) I get smeared 
outputs of my trusty Laserjets. I have both a 4200 and a 4250 (I prefer to 
buy second hand, Postscrypt, professional printers to first hand 
consumer-grade stuff). Not always, tends to happen more when printing double 
sided and less when the printer has been off a while.

I had thought this was old cartridges and I had to survive until I change 
them, but today I had to print some older stuff that dwells on my old 
hackintosh and...  beautiful print! No problem at all.

So. Then it's Linux, not the printers.

I'll soon make a test install of the latest openSuSE and see if there is a 
difference. Both MacOS and Linux using Cups, I'd have thought that standard, 
Postrcrypt drivers would be the same.

Thierry