I upgraded 2gb memory to 4gb on Lifebook 6025. I followed instructions for pae to recognize the 4gb by doing
sudo apt-get install linux-headers-server linux-image-server linux-server
edit grub by adding forcepae -- forcepae
But still it shows the same as before with 3.2gb as below.
jmin@jmin-LifeBook-A6025:~$ free -h total used free shared buffers cached Mem: 3.2G 966M 2.3G 60M 51M 530M -/+ buffers/cache: 384M 2.8G Swap: 3.9G 0B 3.9G jmin@jmin-LifeBook-A6025:~$ dmesg | grep -i pae [ 0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.13.0-74-generic root=UUID=2fca00b1-5199-4d2d-bb5f-9728c10d7a05 ro quiet splash forcepae -- forcepae vt.handoff=7 [ 0.004596] PAE forced! [ 0.008000] PAE forced!
What am I doing wrong? How can I make it use all 4GB memory? Thank you.