Slow Grub on new mobo Q

G.Wolfe Woodbury ggw at wolves.durham.nc.us
Thu Oct 2 06:30:59 UTC 2008


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?

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.




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