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Re: Slow Grub on new mobo Q

On Thursday 02 October 2008, G.Wolfe Woodbury wrote:
>Gene Heskett wrote:
>> Thanks.  But this still does not explain why grub itself is so slow.
>> After the bios is done, then the next thing one normally sees is the "Grub
>> stage 2 loading", but I'm watching a monitor telling me there is no input
>> drive for about 12 seconds between the bios clearing the screen, and that
>> printout.
>> And normally that just sort of flickers for a few milliseconds, but that
>> now stays on screen for 2 or 3 seconds, then the screen is cleared again,
>> and about 10 seconds later the boot choice menu finally pops up.  This
>> only took maybe 2 seconds total on the old motherboard, now it's a good
>> 20-25 seconds from the bios clearing the screen to the boot selection
>> menu.
>> Its that time that I'm fussing about.
>Are you running on an x86_64 platform?

No, the installed compiler is 32 bit only.

>On my 64-bit machine, grub is running in 32-bit mode and it takes a fair
>bit of time for the POST to GRUB transition, just like you describe.
>My theory is that it is taking time to mode-switch from 64-bit to 32-bit
>mode and then back.

Possibly, but that sure seems like an excessive amount of time just to switch 
modes, and it would only be from 64 to 32 anyway.  I am using 32 bit kernels, 
home brewed, and just last night got the PAE turned on in 2.6.27-rc8-4, 
the -4 indicating its built smp etc.  But that makes no diff in the wasted 

Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
"No one gets too old to learn a new way of being stupid."

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