The SuperOneClick app really rocks! Using this app, you could root the LG Optimus 2X pretty easily. One thing to note that is this is a a permanent root also. Another one click root application, the Z4Root, which was released way back is also able to root the same device, but the problem is it isn’t working for many users due to some reason.
Another news for the LG Optimus 2X users to be happy about is that the popular CyanogenMod ROM now supports the LG Optimus 2X. We earlier reported about the release of CyanogenMod 7.1 RC1 which brought about this change.
The instructions on using the SuperOneClick to root your LG Optimus 2X can be found here.