IntelliJ IDEA 13 has the new Search Anywhere feature. It sounds like it might be useful, but so far it just gets in the way. It\'s mapped to some kind of magical shift-
After updating to build 133.331, I tried assigning a normal shortcut to it in Settings → Keymap, and that made it stop appearing on double-shift.
Since end of 2017 you can add -Dide.suppress.double.click.handler=true
to the custom VM options: cf. the answer from JetBrains.
To disable the "Search everywhere" feature, you need to invoke "Go to action" (Ctrl+Shift+A), then type "Registry...".
Scroll down to "ide.suppress.double.click.handler" and check the box.
Source: https://youtrack.jetbrains.com/issue/IDEA-161094
It's called Search Everywhere, and it's present in keymap.
For me it's perfectly disabled.
EDIT As I'v found it is hardcoded now, and will popup at doubleshift source
There is also an issue at jira, about this problem.
I hope it will be fixed soon.
This problem is still present under linux (ubuntu amd64 16.10 ) on Android Studio using X11Rdp for remote connection, maybe in other situations too - the Search Everywhere dialog appear on single Shift press.
The answer is here
https://youtrack.jetbrains.com/issue/IDEA-114933#comment=27-603899
Basically you need to Open lib/resources.jar/idea/PlatformActions.xml and remove or comment such line:
<action id="SearchEverywhere" class="com.intellij.ide.actions.SearchEverywhereAction" />
and repack the jar.