lubuntu-qa team mailing list archive

[Phill Whiteside <PhillW@xxxxxxxxxx>]

I did see this flagged up by Julien. Early reports are that has been
accepted and will be 14.04... just needs testing.

So, on the plus side, that allows a few scant resources to be spent on
non-pae :)

Regards,

Phill.


On 3 March 2014 19:35, Nio Wiklund <nio.wiklund@xxxxxxxxx> wrote:

> Hi Lubuntuers,
>
> A new kind of fake-PAE may be entered into the main-stream 32-bit
> kernel, and I think this long-lasting bug will finally be squashed :-)
>
> Please test it if you have a suitable computer and you have time!
>
> If you want to take a short-cut and use an OBI tarball, let me know, and
> I'll upload it for you.
>
> -o-
>
> The conversation below is from this link about PAE problems for Pentium
> M and Celeron M computers
>
> https://bugs.launchpad.net/baltix/+bug/930447
>
>
> Best regards
> Nio
>
> -----
> Chris Bainbridge (chris-bainbridge) wrote on 2014-03-01:        #274
>
> There's a new pair of patches: https://lkml.org/lkml/2014/2/28/258 and
> https://lkml.org/lkml/2014/2/26/394
>
> It's a small patch but test reports to LKML are still welcome (you don't
> have to be subscribed to the list to respond, just use the correct
> subject line).
>
> roland aus köln (devzero-c) wrote on 2014-03-02:        #275
>
> i just tested your patch on ubuntu 13.10 with kernel from 14.04
> repository (complete package build)
>
> works like a charm!
>
> i would recommend adding the newly introduced param to to
> Documentation/kernel-parameters.txt , see my patch at
>
> https://bugs.launchpad.net/baltix/+bug/930447/comments/224
>
> Thanks for your work !
>
> Andy Whitcroft (apw) wrote 6 hours ago:         #276
>
> @Chris -- I have taken the liberty of cleaning up the commentary on
> those two patches and applying them to a 14.04 kernel for testing. You
> might want to do something similar (feel free to steal the text I used
> and clean it up) and then submit the patches together to upstream for
> consideration; as things have been left I doubt they will be applied as
> the diff and commentary were separate. Also could you test these kernels
> and let me know if they work at all, I do not have affected h/w. We can
> then consider this for the 14.04 kernel. Kernels are at the URL below:
>
>     http://people.canonical.com/~apw/lp930447-trusty/
>
> roland aus köln (devzero-c) wrote 4 hours ago:  #277
>
> works for me.
>
> sudodus (nio-wiklund) wrote 1 hour ago:         #278
>
> Works in my IBM Thinkpad T42 with Pentium M without a PAE flag but with
> PAE capability.
>
> But I have only booted via grub, because I cannot remaster an iso file.
> Did you boot from syslinux, Roland?
>
> Chris Bainbridge (chris-bainbridge) wrote 1 hour ago:   #279
>
> lkml: "grub is jumping to the 32-bit entry point and skipping the entire
> real mode setup code. Bad grub."
>
> You don't need to build a syslinux bootable iso. You can boot the kernel
> from Grub in 16-bit mode by using the linux16 command
> http://www.gnu.org/software/grub/manual/html_node/linux16.html and
> initrd16 https://www.gnu.org/software/grub/manual/html_node/initrd16.html
>
> According to the discussion on LKML, linux16 is now the default on
> Fedora, and should be used by other distributions.
>
> (If you still want to build a custom syslinux bootable system, just for
> fun, see the instructions at
> http://willhaley.com/blog/create-a-custom-debian-live-environment/ -
> it's about 25 lines of code in total, and not difficult to follow)
>
> sudodus (nio-wiklund) wrote 21 minutes ago:     #280
>
> ERROR: PAE is disabled on this Pentium M
> (PAE can potentially be enabled with kernel parameter
> "forcepae" - this is unsupported, may cause unknown
> problems, and will taint the kernel)
> This kernel requires the following features not present on the CPU:
> pae
> Unable to boot - please use a kernel appropriate for your CPU
>
> -o-
>
> So I used the following modified lines in grub.cfg
>
>  linux16 /boot/vmlinuz-3.13.0-14-generic root=UUID="string" ro quiet
> splash forcepae $vt_handoff
>  initrd16 /boot/initrd.img-3.13.0-14-generic
>
> and it boots and runs :-)
>
> WARNING: Forcing PAE in CPU flags
> ...
>
> Thanks Chris :-)
> -----
>
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-- 
https://wiki.ubuntu.com/phillw