Im using ubuntu 12.10 64bit and i always had this problem even in 12.04 64bit.
I have tried everything since :
- Clean install = no success
- Install Preload = no success
- Change Swappiness to 10 = no success
- Tried every version of nvidia driver = no success
- Checked - Bencmarked the disk drive using Disk Utility = Everything fine
My pc is a Sony Vaio with Intel core 2duo 2.60 Ghz cpu and 4gb Ram. Im using ubuntu as my default OS (in his own ext4 partition + swap) and the bad thing is that when i boot in Win7 the pc is going way smoother and faster in contrast with ubuntu.
In ubuntu is like this : Boot in ubuntu , wait for let say 10 min so we are sure that everything has started and cpu load is back to 2 - 3 % , trying to start Google Chrome and counting 1 2 3 4 ..... it takes 12 to 13 seconds to load .. after this if i kill chrome and try to restart it it opens in 1 sec.
The same is happening with almost every application like VLC , Banshee , Evolution , xchat , even terminal ......
As i see that this problem always rise in the forums with no solution after all we really need some serious help.!!