With Android 2.3.6 the functionality of using Locus with hardkeys and disable lockscreen worked fine with SGS2.
With the four hardkeys volume up, volume down, power key and home button I could "wake up Locus" directly to screen, after display was off. Specially the home button was my favourite while cycleing.
After upgradeing to ICS 4.0.4 only the Power key works as expected. The volume controls up and down don´t wake up Locus to screen anymore and the home button though wakes up the screen with a very short tap, but within the next second the taskmanager starts. So you have to tap back for closing the taskmanager.
Any advices to disable or to prevent the taskmanager to start, are welcome.