Well, I read the forum and found out that the recent 1.50(v2 as well) kernel add-on for 3.90M33 have a bug that causes Sleep Mode to stop working.
I saw some people solve the problem by just install 3.90M33 without the 1.50 Kernel add-on.
However, almost all my Homebrews that I use regularly are in 1.50 format.
So is there any apps to convert 1.50 Homebrew to 3.XX ?
Thanks in advance !