I'me the reporter of bug #894341, which I think it is the same.
In the attachment there are the log from gdb as suggested by Sebastien, the /var/log/cups/error_log as suggested in comment 2,
and my the ppd from lexmark (I use this because in the one shipped with ubuntu some settings are missing)
I'me the reporter of bug #894341, which I think it is the same. cups/error_ log as suggested in comment 2,
In the attachment there are the log from gdb as suggested by Sebastien, the /var/log/
and my the ppd from lexmark (I use this because in the one shipped with ubuntu some settings are missing)