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Possible Duplicate:
Why does Ubuntu only show 3GB of RAM?

System reports 2.6GiB, I have 8GB installed in the machine.

In previous versions when installing 32 bit versions the GRUB entry would mention "pae", physical address extension, on the list, but not with this.

Any chance I can get that set up correctly without doing a reinstall?

System details: i5 2500K on ASRock Z68M-ITX/HT

steven@steven-desktop:~$ uname -a
Linux steven-desktop 3.0.0-12-generic #20-Ubuntu SMP Fri Oct 7 14:50:42 UTC 2011 i686 i686 i386 GNU/Linux
steven@steven-desktop:~$ free -m
             total       used       free     shared    buffers     cached
Mem:          2688       1310       1378          0        113        562
-/+ buffers/cache:        633       2055
Swap:         3904          0       3904
steven@steven-desktop:~$
Community
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Steven Lu
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2 Answers2

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Yeah, just sudo apt-get update and sudo apt-get install linux-generic-pae. This should solve it (after succesfull install & reboot).

Eliah Kagan
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lone_ranger
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It should be easy to get the PAE kernel installed. Just search for it in Software Center, Synaptic, or use apt-get. It will take some time to download + install it, but on reboot you will have all your 8 GB :)

This is because when you install this kernel, the grub will also be updated and this kernel will be the one booted by default.

lone_ranger
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