torios team mailing list archive

[Nio Wiklund <nio.wiklund@xxxxxxxxx>]

Den 2014-08-22 18:24, Israel skrev:
> 
> On 08/22/2014 11:16 AM, Nio Wiklund wrote:
>>
>>> I have been staring at CmakeLists trying to force Precise to FindFLTK so
>>> my brain is a bit jelly right now :)
>>>
>>> I think the main issue is the PAE flag. I did mean the opposite. 
>>> Installing on non-pae for the older laptops that don't set the flag in
>>> the processor.  Like 12.04 Lubuntu offering a non-pae installation option.
>>>
>>> Can this be done in OBI by using a pae kernel on a non pae?
>>> as in, the very last section (C) on this page...
>>> https://help.ubuntu.com/community/PAE
>> Yes, this was the fundament for my work with Lubuntu-fake-pae
>>
>> https://help.ubuntu.com/community/Lubuntu-fake-PAE
>>
>> The best alternative for 12.04 LTS is to deliver it with fake-PAE.
>> Otherwise Pentium M and Celeron M will boot from grub, but not
>> 'dist-upgrade' to new pae kernels. It is also possible to deliver it
>> with an old non-pae kernel. Lubuntu and Xubuntu 12.04 came with non-pae
>> kernels originally.
> Ok, I understand you.
> I think I need to find out exactly what Ali is intending for this release

Yes, check that with Ali

>>> So does the whole non-pae issue arise from a flag that a processor
>>> doesn't set, even if it is PAE.
>> Yes, almost. (There are also some rare CPUs with similar 'horsepower' as
>> old Pentium M CPUs that are claimed to lack PAE capability, Transmeta
>> Crusoe and some old Via processors.)
> Ok, so we *may* need the older Kernel or Phill's

Yes, we *may* need the older Kernel or Phill's

>>> I am trying to understand whether or not we can install trusty on a
>>> non-pae flag computer with a normal (in the repos) kernel, or whether we
>>> need to use Precise to do precisely this :)
>> Yes, if PAE capable but without PAE flag, you can use the boot option
>> forcepae in Trusty. See
>>
>> https://wiki.ubuntu.com/Lubuntu/AdvancedMethods#Pentium_M_and_Celeron_M
>>
>>> OR, is it possible to use phillw's kernel and have it stay up-to-date in
>>> trusty?  Or is it needed only for the Live image?
>> It is possible to have Phill's non-pae kernel. I think he intended to
>> keep it up to date, but you have to ask him directly how and for how
>> long he manages to do that.
>>
>> The PAE live image can also boot with the boot option forcepae in
>> Trusty, but not in Precise.
>>
> Ok, I will try to find out exactly what Ali intends, and then if we need
> phillw's kernel we can go that route.

Yes

>>> I hope I am more clear, but it is hard to mush my thoughts back together
>>> :)  And I don't entirely understand the pae issue.
>> Ask again, I'm glad to help you. I think I understand the PAE issue, but
>> may not explain it well enough.
>>
>> (I think that the main problem is that the Ubuntu development team
>> forgot about Pentium M and Celeron M, when they decided to skip the
>> non-pae kernel. And when the decision was there nobody wanted to reverse
>> it. I also think forcepae is a good work-around, and I would be happy,
>> if it could be back-ported from Trusty to Precise, because some drivers
>> for old hardware were dropped between Precise and Trusty.)
> 
> Are these drivers, simply kernel modules?
> Couldn't we sudo modprobe whatever
> or are they no longer available at all?

I don't think precise drivers work with trusty, but I don't know the
details about that. Ask someone who understands kernels and drivers
better than I.

> Thanks for the explanations :)

You are welcome :-)

>>>> I can also run Phill's non-pae kernel in my Toshiba with Intel i5 (which
>>>> has 64-bit architecture). I have made installations with two kernels,
>>>> the default 'generic pae' and the non-pae kernel. Both work, but the
>>>> non-pae kernel cannot use RAM above 2 GB as efficiently as PAE (of
>>>> course). But UEFI demands 64-bit systems.
>>>>
>>>> b. Yes, you get it by default in Ubuntu based systems. If you have only
>>>> a non-pae kernel you can install the current PAE kernel with
>>>>
>>>> sudo apt-get install linux-generic-pae
>>>> probably even
>>>>
>>>> sudo apt-get install linux-generic
>>>>
>>>> will install it. Try it yourself :-)
>>>>
>>>> If I remember correctly, it is one of the menu alternatives in
>>>>
>>>> http://phillw.net/isos/linux-tools/9w/obi_Trusty-nonpae-txt5-9w.iso
>>>>
>>>> Best regards
>>>> Nio