Installing 12.04 on non-pae hardware

Tim Gardner rtg.canonical at
Tue Mar 6 16:27:52 UTC 2012

On 03/06/2012 07:50 AM, David Henningsson wrote:
> On 02/10/2012 05:44 PM, David Henningsson wrote:
>> Hi,
>> It was decided not to drop the non-pae kernel flavour until 12.10, so
>> that non-pae computers would still be supported for five years.
>> I happen to have one of these, I use it on a daily basis for IRC and a
>> few other things. So now I want to test 12.04 on that laptop, but when I
>> try to boot the daily live-CD, I get an error saying that my CPU is
>> missing the pae feature.
>> How can I install 12.04 on my non-pae kernel when I can't boot the
>> installer? Am I missing something?
> I got no responses from the above, so I took the matter in my own hands
> and created a custom Live-CD, based on 12.04 beta1, with the only
> difference that it boots and installs a non-pae kernel instead of the
> pae one.
> It's available here for those who want it:
> Note that this is work made by somebody who is not a LiveCD expert by
> any means, never made a custom LiveCD before, and merely followed the
> instructions here [1]. You have been warned. :-)

Your only option for a non-PAE CPU is to upgrade from a previous 
release. The 12.04 installer will not boot a non-PAE CPU.


Tim Gardner tim.gardner at

More information about the kernel-team mailing list