I installed FC 15 onto a laptop that previously had XP installed. While XP reported that Physical Address Extension was enabled, I am unable to find any reference to it in Fedora. How can I tell if the kernel I'm running supports it, and how can I enable PAE if it's not currently supported?
uname -a or
cat /proc/version and see what the kernel string looks like - for example:
Linux aa1.localdomain 18.104.22.168-35.fc15.i686.PAE #1 SMP Wed Jul 6 14:29:06 UTC 2011 i686 i686 i386 GNU/Linux
If 'pae' (or 'PAE') isn't there then your kernel doesn't support PAE
If you do not have the PAE kernel installed, issue the following command (as root):
yum install kernel-PAE
Just to make sure your processor supports PAE, you should do the following first:
cat /proc/cpuinfo | grep -i PAE
If there's no sign of pae (or 'PAE') in the output, your processor doesn't support that mode.