Re: Additional RAM brings Lenny to a slow-down

[andy <geek_show@dsl.pipex.com>]

andy wrote:
> Andrei Popescu wrote:
> > On Fri, Feb 29, 2008 at 12:14:37PM +0000, andy wrote:
> >   
> > > Andrei Popescu wrote:
> > >     
> > > > On Fri, Feb 29, 2008 at 07:18:41AM +0000, andy wrote:
> > > >
> > > > [...]
> > > >
> > > >   
> > > >       
> > > > > with a fix from the manufacturers. The other alternative seems to be the 
> > > > > mem=xxx option passed to the kernel. If I use the latter approach, is 
> > > > > this something that I can develop a script to do automatically at boot 
> > > > > (for example, to run it as part of the GRUB parameters), or is it 
> > > > > something that I would have to do manually?
> > > > >     
> > > > >         
> > > > $ grep kopt /boot/grub/menu.lst
> > > > ## If you want special options for specific kernels use kopt_x_y_z
> > > > ## e.g. kopt=root=/dev/hda1 ro
> > > > ##      kopt_2_6_8=root=/dev/hdc1 ro
> > > > ##      kopt_2_6_8_2_686=root=/dev/hdc2 ro
> > > > # kopt=root=/dev/hda2 ro vga=791
> > > > # xenkopt=console=tty0
> > > >
> > > > Regards,
> > > > Andrei
> > > >   
> > > >       
> > > Thanks for this Andrei. How would I tweak this to enable my kernel to 
> > > recognise and utilise the additional RAM? Looking through the file, the 
> > > relevant section appears to be this commented part:
> > >     
> >
> > No, the line you need to edit is the one with 'kopt=...'. Don't 
> > uncomment it, just add the relevant parameter to the end (like I added 
> > vga=791 for my laptop).
> >
> > After you're done you *must* run /usr/sbin/update-grub
> >
> > Regards,
> > Andrei
> >   
> Andrei
>
> My question is about the specifics of the option to add at the end of 
> the line:
> Because I am looking for 2GB RAM to be recognised, do I add 
> mem=2097152M to the end of the kopt=... line? I don't, for example, 
> know what outcome you were looking for and resolved by adding vga=791 
> to that line in your config. VGA I can but assume had something to do 
> with a graphics card, but beyond that ... ?
>
> Thanks and apologies for being apparently dense. I can assure you I'm 
> not being deliberately obtuse.
I added mem=2048M to the end of the line so that it now reads:

	# kopt=root=/dev/hda1 ro quiet mem=2048M

And ran /usr/sbin/update-grub and rebooted.

It still took just under 10 minutes to get back to login at the gdm screen, so I am at a complete loss now.

Any further suggestions, or did I misunderstand something?

Cheers

Andy



--

"If they can get you asking the wrong questions, they don't have to worry about the answers." - Thomas Pynchon, "Gravity's Rainbow"