iMac goes to sleep mode even while using it
After installing mavericks my imac keeps on going to sleep mode approximately every 25 seconds. However, this issue occurs only when I turn it on from a complete shut down or when the power cord was detached. When the issue happens, I simply RESTART the machine at the issue is gone. It does not sleep anymore but after using it for a long period, it freezes. The mouse pointer works but no response from anything on the window. I would have to restart the machine again by pressing and holding the power button. Tried to reset SMC etc but no go. I set my imac to never go to sleep and display sleep at 15 mins. I tried to dual boot with mountain lion and issue is even worse when booting with mountain lion. All of these happened after installing mavericks. I never had this issue with mountain lion before. The temp is no greater than 50 degrees Celsius. It is an intel i3 imac. Please help. Sorry for my english I'm from the philippines.
Is this a good question?