On the Droid X, after Froyo, you can't do the pattern unlock without first doing the slide unlock. If you want to take the pattern unlock back off your phone, you have to first go to Settings, Location & Security and tap on Change Screen Lock. Draw your pattern, then select None and that should put you back to only having the slide unlock. Just unchecking the use visible pattern check box only won't take it off. The only way I know of to disable the swipe unlock and have only the pattern unlock is by using an app called AntiLock. It has a No Lock Mode (neither swipe or pattern unlock) and it has a Skip Lock Mode (pattern unlock only). It's kind of buggy though because it flashes the swipe unlock screen momentarily and then changes on its own to the pattern unlock screen. Also, if you should happen to put your pattern in incorrectly, then it reverts back to the swipe unlock screen and then you have to do both the swipe and pattern unlocks.
