this is my situation: I have a XPS under Ubuntu 10.04 LTS 64-bit
I downloaded the latest Android SDK with eclipse. The SDK works fine, but when I create a new AVD an
Not the solution to the OP's exact problem, but to the "the android emulator does not start, avd" nevertheless.
Make sure there's nothing else competing for virtualization.
I had a headless Virtual Box image running and experienced similar behavior. It would show as started, but the emulator wasn't visible. The ./emulator -verbose -avd ... would just never finish.