Updated to 10.6.8, now I can't print

Remedy: reinstall the printer from the disk and delete the problem printer.

I have been using my Canon MX870 printer on a nework with my partner's iMac successfully for a while, and only recently had problems getting it to print wirelessly, except that it would only work if his computer was switched on.

I also received the dreaded '/usr/libexec/cups/backend/dnssd failed' message today, and after trying several of the remedies suggested in this thread I reinstalled the printer from the Canon disk and deleted the printer in the list which was causing the problem.

I don't think it was the updating to 10.6.8 as I had done this some time ago and all worked fine. The problem is in the Canon printer setup, but as to the where and why I do not have the time to waste trying to fix it, and just hope this continues to work. What this 'cups' message is I don't know and I don't want to know: I just want these things to WORK.

I don't even dare to upgrade from 10.6.8 on the basis that if it is working, don't fix it.

Thanks all for helpful hints on here... finally sorted it using IP printing. However this is not a long term solution. Apple, please sort this asap!!

I reinstalled Snow Leopard and then used the combo upgrade and my HP printer finally worked.

I used the dmg that vcboy created and that fixed the printing problem for me. Takes about 1 minute. See my post at the bottom of page 20 for the link.

Make sure networked computers and printer are on same Subnet Mask if printer sharing is not working.

I have this issue but with different printer as well. I was printing right before 10.6.8 update to a Xerox 242 with build in Fiery Rip and now print queue just go to pause. I do see in logs same error too. I have done everything listed above except download the full combo 10.6.8 update ( my system update just was the incremental update to 10.6.8 ) but will try that in morning time and see if that fixes something. I think this has something to do with 10.6.8 getting system ready for LION.

We're using a networked Xerox WorkCentre 5225 over here, same deal. Two of our four iMacs are updated to 10.6.8 (both w/ the incremental update, and one w/ the combo on top of the incremental), and two are still 10.6.7. The un-updated machines print fine; the two updated ones are stuck in "Printer Paused" purgatory. We'll try gmeade's workaround for now, but this is quite bothersome. Here's hoping Apple gets this diagnosed and fixed post haste.

Here's what Terminal shows for permissions. iMac is running 10.6.8.

Note that I grabbed a copy of 'socket' from another Mac (G4 Sawtooth) running 10.6.7.

'socket' was copied in from 10.6.7; 'socket copy' was copy of original messed up file after the 10.6.8 update.

-r-xr-xr-x@ 1 root wheel 75200 Jan 4 00:22 socket

-r-xr-xr-x 1 root wheel 79328 Apr 29 17:45 socket copy

I don't get into Terminal too often, so I appreciate the patient and helpful comments by all in this thread! It's encouraging to know there are still folks out there who want to share what they know, and are willing to help others without expecting a red carpet and trophy.

Printer model: HP CM2017

Problem: Failed to print after upgraded to 10.6.8

Solution: Removed printer. Add printer from System Preference. DO NOT USE BONJOUR to look for printer. In stead enter printer IP address and print using HP Jetdirect.

Just to add my 2 cents: upgraded to 10.6.8 on Friday; could print to one printer (a Konica Di3010f), but could not print to a Konica BizHub C300 due to the "dnssd failed" message. ipp is crashing with a divide by zero error.

Fortunately, I made a backup before upgrading, so I'll restore the 10.6.7 files.

here is an idea... curious if this works. If you cant print, take a crossover cable (not an eithernet cable) connect it to the printer. Reset the printer on the mac by adding it to the printer list if it is not already there or if it is there add a new printer. After adding the printer test your printing, then test with the crossover cable disconected. I use to own a HP business injet 1200 and that is what was needed sometimes.

After installing 10.6.8 on my 2011 MacBook Pro, I, too, had the printing problem - my Canon PIXMA MP990 would time out after each print. I print to it wirelessly. I was uncomfortable replacing a file in a hidden System folder, so I tried the other suggestion somewhere on this posting. I went to the Print & Fax pref pane and CTRL-clicked on the printer. I then selected Reset Printing System. I then had to reload the printer and reset its paper handling and ink preferences because the original ones had been deleted. However, now my printing is running is it did before the 10.6.8 update. All this is using Apple's own method of fixing, rather than applying a kluge.

Thanks garlun. Installing the below repair got me printing again!

"find this one cnet and this is a much easier solution for those not so family with os x

Was solved with this: http://www.geocities.jp/horiemonmail/Repair10.6.8.dmg

"

Bill Posters wrote:

I have exactly the same error message.

That error message has been a problem for various Epson users at different points during Snow Leopard. It is most likely a driver problem that Epson will have to address. Apple does not write the printer drivers.

Surely Apple could add a "Report a Problem" to their downloads as they do in Itunes. I have found it almost impossible to get help from them. I'm far from impressed. They have to make fault reporting simpler so they know what the problems are that they create with these upgrades! Very disenchanted with Apple!

You can and should submit bug reports and other feedback to Apple at http://www.apple.com/feedback/macosx.html

you are right again (by the way, I can't find the "Correct Answer" button to flag your posts - do you know where it is?) - I downloaded the Epson v2.6 printer package and it has restored printer, so for my model it appears the problem is the Epson printer driver rather than OSX 10.6.8.

Also re my comments above for the Gutenprint RX640, it seems to work fine on my RX650 now if that's useful for the developers - the colour problem I referred to above seemed to be present on the v2.6 Epson driver too so I checked all of the inkjet nozzles and restored the colour - it was the printer itself rather than the driver...

Thanks again