Sorry for the confusion,

*I asked*

>     I have a couple of questions about your Sony Vaio with Pentium M:
>
>     What happens when you try to boot a PAE kernel with forcepae? Do you get
>     an error message? Black screen?
>
>     Are you sure it is not 'only' a problem with some other hardware, for
>     example graphics or wifi? You could try to boot with the boot option
>     'text' and switch off the wifi if possible.

*The owner replied*

>   Most of my 'nonpae' observations have come inside VirtualBox where I
>   noticed the 'pae/nx' checkbox is greyed out and every distro. I try that
>   is pae only, informs me that I have a cpu that doesn't support the pae
>   option.  Trying 'forcepae' using a recent kernel eventually ended with a
>   blank black screen.
>
>   I tried to use a Gparted live CD recently and that gave me a similar
>   message when it attempted to boot.
>
>   Yesterday I squeezed some unused space out of my HDD using Gparted and
>   created an empty new extra linux partition (about 9 GiB) and I'll try a
>   'real metal' install of a pae kernel sometime later today.

*I replied*

> You can test that it is not problems with the graphics chip using the
> boot options 'forcepae text' in a 'standard Lubuntu 14.04 LTS installer'.

*And the owner solved the problem*

You were quite correct to keep asking questions.

Using the 'forcepae' parameter I have now successfully installed Lubuntu
14.04 on 'baremetal'.

I'm happy with that as you can imagine.  There are many ways that I tried 
before that failed but
obviously there is nothing that replaces a 'baremetal' install.  My first clue 
that it may work was
when I used 'forcepae' to boot from the LiveCD that I made and that worked.

Apologies for causing you extra work and innocently misleading your research.  
All's well that
ends well, as the saying goes.

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https://bugs.launchpad.net/bugs/930447

Title:
  Unable to start Ubuntu 12.04 live CD with syslinux loader on Pentium M
  x86 Laptop due to bug in PAE kernel, initramfs or syslinux

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