I recently upgraded my ThinkPad to 4GB RAM. However to my surprise I learnt that 32-bit OSes can only access 3GB of the RAM. Sad, isn't it? But, here's how to get happy –
- First check if your CPU supports PAE, run “cat /proc/cpuinfo | grep pae”, any output is success.
- Run this command to install the PAE enabled kernel-
sudo apt-get install linux-image-generic-pae linux-generic-pae linux-headers-generic-pae