Problem with Hibernation or suspension

view story

http://askubuntu.com – I have installed Ubuntu 12.10 on my Acer Aspire 5742G recently but I can't neither put it to hibernation nor suspend it. If I hibernate it then when I press the power to wake it up, it doesn't show anything on the display and I have to force power it down (by pressing the power for a few seconds), and press the power again. Even sometimes the same thing happens when I shut down the laptop. I tried TuxOnIce, no result! As far as I know it's not a bug in 12.10. My internal wireless card is not working properly and I am using a USB wireless card. Do you think it might be the reason? Any one has (HowTos)