Comment 3 for bug 532831

i have the same printer HP 930C giving me the exact same problem, printer freezes with all 3 lights flickering when I try to print on 4x6 inch photo paper. Printing on A4 paper is working fine.
I'm currently using Ubuntu 10.10 (maverick)
looking around on the internet i discovered that the current user should also be part of the group "lp" which was not the case on my system, after adding the user to group "lp" the problem still persisted. On another bug report (Debian #556406) I discovered that the package "gs-esp" did solve the problem.

After installing the package "gs-esp" (apt-get install gs-esp) I was indeed able to print on photo paper format 4x6 inch