I have 4GB or more of RAM but can't see it in Ubuntu. How can I enable support for more than 3GB ? Do I need a 64 bit edition of Ubuntu ?
- Keywords:
- nvidia,pae,kernel,4GB,RAM,3GB,64bit,64
- Last updated by:
- Fabián Rodríguez
There are two choices to enable support for more than 3GB of RAM in Ubuntu.
One of them is installing a 64-bit version of Ubuntu.
The other one, if you want to keep using a 32-bit version, is installing a Physical Address Extension (PAE) -enabled kernel. The server kernel provides such functionality. Installing the "linux-server" package will install such kernel and make it part of your choices at boot in the GRUB menu. if you want to easily manage that on a desktop install, you can also install the startupmanager package, then go to System > Administration > StartUp-Manager to change your default boot options and more.
To read more about PAE, see: http://
PAE is not enabled by default in 32-bit Ubuntu kernels. Starting with Ubuntu 9.10 (Karmic) a PAE-enabled kernel is available, see:
https:/
*IMPORTANT* If you're using any binary drivers for display (Nvidia, ATI) disable them before installing the linux-generic-pae package.
After rebooting and logging into a PAE-enabled kernel Ubuntu version you may be able to re-enable your binary display drivers if so needed/wanted.
For further discussion and explanations on why PAE is not enabled by default on 32-bit kernels in Ubuntu, see:
http://
http://
