I installed ubuntu 11.10 on my old desktop Dell Dimension 3000. The installation went well except that I noticed that it installed the OS on the 1T external USB disk. The problem I am seeing is that after some no-activity time, it goes into the sleep mode and any key or the power button can wake it up. This does not happen every time. Other times, it will show the lockout menu and request the password.
Does anyone have had similar problem and solved it? Any help will be greatly appreciated. I followed some similar posts and disabled my "hibernate" and "suspend" option on the menu.
The only way I can come out of it is to power cycle the computer.