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HP inkjet

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paysonscroft
 
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Joined: Mon Feb 08, 2021 10:48 am

HP inkjet

by paysonscroft » Mon Feb 08, 2021 11:00 am

os Big Sur on iMac as soon as I run Sighthound Video the two HP ink jet printers on my local network display an error message and won't print, if I shut down Sighthound Video and reboot iMac and both printers then I can use both printers as normal, so Sighthound Video seems to be the problem

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visionik
 
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Joined: Sat Oct 01, 2011 7:33 am

Re: HP inkjet

by visionik » Tue Feb 16, 2021 10:55 am

This is actually due to a (rather bad) bug in certain firmware versions of HP Printers.

Specifically:

Sigthound sends out Multicast queries on your local network to discover any new cameras that you have installed. These queries can be in different forms and names: Bonjour, mDNS, and UPnP. Many camera vendors support these queries so they can be discovered and configured easily.

Many printers also support such queries, this is how your operating system automatically discovers your printer.

HP Printers support these queries, but certain HP printers with certain firmware release will creash when they receive them.

The problem is, unfortunately 100% on HP. Check and see if a new firmware release is available for your printer.

Hope this helps.

-Jonathan Taylor (Co-Founder and Chairman, Sighthound)

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visionik
 
Posts: 48
Joined: Sat Oct 01, 2011 7:33 am

Re: HP inkjet

by visionik » Sun Mar 07, 2021 1:01 pm

Hello - I bought an HP printer that has this bug in it.

I was able to fix it by turning off WS-Discovery in the HP printer. Why does this fix it?

ONVIF is the industry-standard for discovering cameras on a LAN. It uses the WS-Discovery broadcast protocol. HP also offers some WS-Discovery based features. HP printers have a bug however: when they received WS-Discovery broadcast messages they don't recognize, they crash.

You'll need to find the IP address of your HP printer, and then go to that IP address in a web browser. Then use the following to disable WS-Discovery on your printer.

hp-printer-turn-off-ws-discovery.png


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