Re: Slow Grub on new mobo Q
- From: Gene Heskett <gene.heskett@xxxxxxxxxxx>
- Date: Thu, 02 Oct 2008 09:27:14 -0400
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
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
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
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