Re: [ACPI] Re: mem= option for broken bioses

[Ducrot Bruno <ducrot@poupinou.org>]

On Thu, Feb 27, 2003 at 04:19:07PM +0100, Pavel Machek wrote:
> Hi!
> 
> > >>OK, looks reasonable. Can you also gen up a patch documenting this in
> > >>kernel-parameters.txt?
> > >>   
> > >>
> > >
> > >You can, assuming you took the patch ;-).
> > > 
> > >
> > well how can i find the correct value`s to put in ??
> 
> Well, similar method to how you use mem=123@456 parameters. You just
> guess them. [Given kernel messages, it is actually quite easy.]
> 

If I understand you,  you then just have to mem= with the correct
value reported via, for example:

ducrot@novae:~$ dmesg | grep 'ACPI data'
 BIOS-e820: 000000000fef0000 - 000000000feff000 (ACPI data)

Interresting :)

Ok.  Here is actually a method:
A phoenix bios (and you have one) will reserved typically 64ko
for ACPI data below ACPI NVS.

ducrot@novae:~$ dmesg | grep -i 'ACPI NVS'
 BIOS-e820: 000000000feff000 - 000000000ff00000 (ACPI NVS)
ducrot@novae:~$ python
Python 2.1.1+ (#1, Jan  8 2002, 00:37:12) 
[GCC 2.95.4 20011006 (Debian prerelease)] on linux2
Type "copyright", "credits" or "license" for more information.
>>> 0x000000000feff000 - 65536
267317248

If my bios will be incorrect, I will then pass
mem=267317248#65536
and voila.


But big problem though.  It is really really strange that the
BIOS mainteners have broken e820 call, are you sure you have
enabled acpi in BIOS, and/or power management ?

Cheers,

-- 
Ducrot Bruno

--  Which is worse:  ignorance or apathy?
--  Don't know.  Don't care.