Running Android 4.0.4 on Emerson EM543 Tablet. Could not install Google Play so had to install Android Market. Market apparently somehow disables the Android system LockScreen. So, now trying to get lockscreen back on boot (downloadable apps, as far as I can see, don't lock screen at system boot, which is what I want). I got a terminal emulator and ROM kit and was wondering if there was a Linux command line argument I could use to start Droid lockscreen at system startup. Any suggestions?

All the questions and solutions I have found regarding "lockscreen" deal with programmatic solutions. I am looking for a linux command line argument that could be used in a startup script.

Thank you.