Just installed Ubuntu 11.04, setup a zebra label printer, and a HP LaserJet 4050t.
Both printers are set up on a networked windows computer and I am connecting to them using samba.
Both printers work fine printing a test page, and printing from a text editor, the label printer works fine from Firefox, but the hp printer doesn't, Ubuntu says the page was sent to the printer and was completed.
The hp printer has a display, and if its in sleep mode, and you try to print from Firefox, it wakes up, but still does nothing.
I have the newest Firefox (7)
Iam fairly new to the GUI version of linux, I have a Ubuntu server running our companies website, but never had to mess with printers on it so this is all new to me.