On Wed 12 Jun 2013 at 23:40:31 +0800, 王晓林 wrote: > That's all I can tell for now. If any information I can provide, let me > know. As root: cupsctl --debug-logging echo '' > /var/log/cups/error_log Then print from emacs. Please attach the error_log to a mail to the bug. Also say what printer you are using and what PPD it uses. You may also attach the /etc/cups/ppd/your_printer.ppd. Regards, Brian.