Avahi / Airprint and CUPS

[Paul Conklin]

After much Googling and toying last night, I've found several people with this issue.  It turns out to be an Avahi issue, so I'm ditching the Avahi layer and using the Apple Open Source code for Bonjour.  so far inital tests look good.

> I know this really isn't a CUPS issue, but i'm hoping someone will have suggestions as i'm about ready to pull out my hair!
>
> so here 'tis
>
> got 2 ipads and 2 iphones (all 4 running latest version of iOS).
>
> have cups (just left it at 1.3.7 for now on my sandbox) and avahi all set up
>
> using the auto-setup scripts from here
> http://atxconsulting.com/posts/Automatically_generate_AirPrint_Avahi_service_files_for_CUPS_printers/
>
> sandbox environment:  Linksys router / wap, 1 Airprint capable printer, 1 non-airprint capable printer, 1 CentOS 5.8 box w/cups on it
>
> Here is where it gets odd...
>
> ipad's 1 and 2 ALWAYS see the cups/avahi printer
> iphone 1 SOMETIMES sees the cups/avahi printer
> iphone 2 NEVER sees the cups/avahi printer
>
> but they all see the Airprint enabled printer!!!
>
> i've done wiresharks and can't find any real differences.  even to the point of printing out the packet with the mDNS query.  I see two questions sent (_universal._sub._ipp._tcp.local and _universal._sub._ipps._tcp.local) but only one response to iphone2 and 2 responese to the ipad's
>
> anyone have any ideas?