[lubuntu-devel] non pae

Nio Wiklund nio.wiklund at gmail.com
Fri Mar 11 21:08:25 UTC 2016


Den 2016-03-11 kl. 21:49, skrev Henk Terhell:
>
> Op 2016-03-11 om 20:35 schreef Phill. Whiteside:
>> Hi Nio,
>>
>> we have until 22nd March before B2 testing, so if you'd be so kind as
>> to draft up some instructions I'll set up a mini-page as a spreadsheet
>> so volunteers can record results. I think such a thing will also be
>> invaluable as we move to wards dual running with LXQt so we have a
>> common set of benchmarks to test against.
>>
>> Many thanks,
>>
>> Phill.
>>
>> On 11 March 2016 at 18:41, Nio Wiklund <nio.wiklund at gmail.com
>> <mailto:nio.wiklund at gmail.com>> wrote:
>>
>>     Hi Phill,
>>
>>     The kernel has increased in size and it needs more RAM than
>>     before. Maybe systemd also means that Lubuntu needs more RAM than
>>     before. In order to know the exact figures, I think someone really
>>     needs to test it (which does take time to perform).
>>
>>     I am quite busy nowadays. Maybe we can ask someone (else) to do
>>     it. I can help by describing how to do it (and to get some kind of
>>     comparison between Xenial and Trusty).
>>
>>     Best regards
>>     Nio
>>
>>     Den 2016-03-11 kl. 18:24, skrev Phill. Whiteside:
>>
>>         Thanks Nio,
>>
>>         I've prepped up the +1 page 'Advanced Methods' page for our
>>         upcoming
>>         16.04 LTS [1]. From my reading of the page, it is mainly to
>>         see if there
>>         has been further 'RAM creep' for the minimum required from
>>         14.04 to 16.04.
>>
>>         Comments from you (and everyone else) greatly appreciated.
>>
>>         Regards,
>>
>>         Phill.
>>         1. https://wiki.ubuntu.com/Lubuntu/AdvancedMethods+1
>>
>>         On 11 March 2016 at 16:24, Nio Wiklund <nio.wiklund at gmail.com
>>         <mailto:nio.wiklund at gmail.com>
>>         <mailto:nio.wiklund at gmail.com <mailto:nio.wiklund at gmail.com>>>
>>         wrote:
>>
>>             Den 2016-03-11 kl. 16:29, skrev Phill. Whiteside:
>>
>>                 Hi,
>>
>>                 can you recall at which release we no longer needed to
>>         add the
>>                 force-pae
>>                 flag for the 'M' series CPU's.
>>
>>                 Thanks,
>>
>>                 Phill.
>>
>>
>>             Hi Phill,
>>
>>             *non-pae*
>>
>>             I think that the last version of the Ubuntu flavours with
>>         a non-pae
>>             kernel is 12.04 LTS (kernel series 3.2). Lubuntu, Xubuntu and
>>             mini.iso were available with non-pae kernels (but not
>> standard
>>             Ubuntu, and I don't know about the other flavours). 12.10
>>         and later
>>             versions have only PAE 32-bit kernels (and 64-bit kernels).
>>
>>         https://help.ubuntu.com/community/Lubuntu-fake-PAE
>>
>>
>> http://archive.ubuntu.com/ubuntu/dists/precise-updates/main/installer-i386/current/images/netboot/
>>
>>
>>             *fake-pae*
>>
>>             Fake-pae was used for Lubuntu 13.04 and 13.10. (Remember that
>>             Lubuntu 12.04 was supported for 18 months, so it
>>         overlapped Raring
>>             in time.)
>>
>>             *forcepae*
>>
>>             We need no longer use fake-pae (installed via a ppa).
>>         Instead we
>>             need the boot option forcepae, which was introduced with
>>         14.04 LTS
>>             (kernel series 3.13). I have tested forcepae with my IBM
>>         Thinkpad
>>             T42 (with Pentium M) and it works also with 15.10 and
>>         Xenial (to be
>>             released as 16.04 LTS).
>>
>>             Best regards
>>             Nio
>>
>
> The HTOP data I have seen so far do not indicate a RAM creep.
>
> The L.14.04.4 LTS i386 on my old laptop starts right after boot at 195
> MB and increases to a steady 245 MB when dropbox finished syncing.
>
> A fresh install of L16.04 i386 on my AMD Sempron 3400+ desktop showed
> less than 200 MB. However I don't know the exact figure, because I
> switched this one to LXQt which increased RAM in HTOP to 434 MB. This
> installation does no longer show LXDE at the login screen though I
> followed the instructions for installing LXQt.
> Therefore I will wipe this partition and replace by daily Xenial and
> report asap. That is all the help I'm able to offer.
>
> For your info updated Xubuntu Xenial i386 on the same desktop now shows
> 186 MB after booting.
>
> Henk
>

Hi Henk and everybody else who wants to test how much RAM is needed by 
Lubuntu Xenial,

Would it possible for you to try installing while limiting the available 
RAM with the boot option mem=xxxM (e.g. mem=256M)
and find the limit, where it stops working? You can compare your results 
with those at

https://wiki.ubuntu.com/Lubuntu/AdvancedMethods#Test_results

Notice that you will get different results with different hardware, so a 
result from Xenial should be compared to a result from Trusty in the 
same computer.

Best regards
Nio



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