First I thought it was a problem of VS2013 RC/beta but now I installed VS2013 RTM and still have the same problem: code completion does only open after I execute it manually
TOOLS->Import and Export Settings Wizard->Reset all settings->select “No, just reset settings, overwriting my current settings”->Choose a Default Collection of settings. Check it again.
Here's what worked for me (using Visual Studio 2013 w/ ReSharper 8.0.2):
When intellisense is displayed is a language specific setting. If you're asking about c# then you want to check the following
If you're using a different language please update the question and I'll try to point you in the right direction
Method 1
Method 2(for me after uninstall resharper)
Do not need reset all settings. I had a same problem but i' ve have just solved it.
good luck:)
This happened after uninstalling Resharper 8.x (I don't see the point given VS 2013's advances), so I'd chalk this to an unclean resharper uninstall.
The solution is very quick though: