Duplex printing

[dempson]

My printer will only print two-sided manually. What has happened to auto duplex printing?  I had no problems until now.

[dansdaduk · Accepted solution]

The 'automatic discovery' feature used by some drivers on installation (or update) doesn't always work; ensure that the driver knows that a duplex unit is present on the printer (assuming that one is present):

• For the printer instance in question, bring up the Printer properties dialogue.
• Select the Device settings tab.
• Ensure that the duplex unit is set to Installed rather than Not installed.

You'll probably need to be logged in with administrator credentials in order to change the device settings.

[dempson]

Thanks for this.  When I checked, I realised that my printer was installed twice with two different ids.  One was shown with duplex installed and the other was not so I removed that one and guess the problem will be solved. 

[hkarlsberg]

I have a HP6700. I never had any problem with 2 sided printing until suddenly, it will not do so. I have run the trouble shooter, updated the driver, and tried everything I can think off.

Whenever I go into printer properties, etc., and I sellect "flip on long side", it shows a yellow triangle and will not allow me to use it. "Duplexer" shows as installed, ut I still have the problem. Do you have a solution to fix this problem?

Thanks.

[dempson]

Sorry, I can't help you with this - I needed help with a similar problem.  Have you tried uninstalling and reinstalling the printer?  That sometimes works with this kind of problem.