Ubuntu – Printers get signal – but why don’t they print in 11.10

(refers to Ubuntu 11.10 Oneiric)

I set up a printer connected via USB (Canon MP630) and a network-printer (Brother HL-2030 via Fritz!Box 3270). When I try to print something the files get sent to the printers (Ubuntu says so) and the printers get activated: They wake up from standby (if so) and (Canon) show a message "start printing" resp. (Brother) sound like they would start printing. But two seconds later everything stops and nothing happens anymore. Ubuntu said everything got printed.

How can I solve the problem and print again? How to gain more information of the process? Everything worked well in Ubuntu Natty 11.04.

And it might be of interest that it is no problem to scan anything with Canon MP630, as well as I recieve status-messages.

EDIT:

I deleted both printers again, rebooted and installed them newly. Now it works partly:

(Brother HL-2030) I used to choose the original Brother-ppd when it didn't print. When I took the Ubuntu-recommended one I now can print, but can't configure all the options I was used to configure (i. e. Sleep-Time …)

(Canon MP630) I can print now, but it is totally messed up: It prints 1mm-lines of colour and between each line is a blank line. So it prints only the upper part of an image and at all it looks pale and stretched.