Verified Launchpad Mountain Lion Bug - Work Around Solution
I have the VERY SLOW to OPEN Launchpad bug issue on ML 10.8.2, using two external monitors, one hooked up to my Thunderbolt port and one hooked up to my DisplayLink USB 2 adaptor running the July 2, 2012 DisplayLink Mountain Lion firmware update.
If you have your applications launch bar at the bottom of the external monitor that is hooked up to the DisplayLink adaptor, you will see this problem. If you wait about 2-3 minutes after clicking the Launchpad icon, Launchpad will finally open. Unacceptably SLOW!
Work around solution: (discovered through experimentation)
1) Open your display control at the top of your mac window (open rectangle with an up arrow shape intersecting the bottom)
2) click "Open Display Preferences"
3) click "Arrangement"
4) Grab the "white bar" which is displayed at the "top" of one of the two monitors shown. Drag it to the top "other monitor" which should be the monitor that is driven directly by your Mac via the Thunderbolt (or prior named port).
Like "magic" you can now tap on the "Launchpad" icon (which is now on the other monitor) and it opens instantly.
Cause? I have no frigg'n idea. DisplayLink engineers should be able to fix this one. It worked just fine on Lion. My guess is that this wasn't on their verification checklist. I hope the fix it soon
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