Cannot restart printing service (cupsd) from Mac

[anonymous]

> For Tiger, cupsd is integrated with launchd, so you don't always need
to restart it.

For Panther the most reliable way to restart is to use:

     sudo killall cupsd
     sudo cupsd

With Tiger, just use the first command.
>

I guess it's rather a problem with Mac than with CUPS.

There's one senario:
I put ppd in /usr/share/cups/model, and I can add PPD through 127.0.0.1:631 
but the printer is not available in Printer Setup Utility.

So, I have to restart Mac...