I am having trouble using PAE on Ubuntu Server 12.04 LTS 32bit. I recently upgraded from 4 to 8gb of RAM but PAE doesn't appear to have picked this up.

When I run
grep --color=always -i PAE /proc/cpuinfo
I get pae in the list.

When I run
dmidecode | grep Size | grep MB
Installed Size is 3825 but the Maximum Total Memory Size: 8192 MB.

When I check the BIOS it says there is 8192 MB available. The computer manual also says and the computer supports that amount.

I have followed everything I can find on the internet (including this https://help.ubuntu.com/community/EnablingPAE) and nothing is working.

My Computer is a Toshiba Portege M750 bought in 2009. It has an Intel Centrino Core 2 Duo processor. The RAM I bought doesn't appear to have a brand listed but this is where I got it http://www.ramcity.com.au/product/KI...200-8G-021.htm. It's specs are exactly the same as my old RAM except it is twice as big.