Re: new x86 setup code hangs on Dell Inspiron 5150

["H. Peter Anvin" <hpa@zytor.com>]

H. Peter Anvin wrote:
> Will Simoneau wrote:
> > While trying to put together a new kernel for my laptop (Dell I5150, as
> > in subject) I found that recent kernels just don't boot. Right after
> > grub loads the kernel, before the "Uncompressing Linux" message is
> > shown, it hangs. The BIOS appears to still be alive (ctrl-alt-del works,
> > keyboard lock LEDs respond). It seems to be caused by the new x86 setup
> > code.
> >
> > My kernel is Linus' git as of a1c582d0720f2eff61043e90711767decf37b917.
> > I bisected and confirmed that 4fd06960f120e02e9abc802a09f9511c400042a5
> > triggers a non-functioning boot.
> >
> > This system has Dell BIOS rev A38 and a P4 3.2 w/HT.
> >
> > What should I do next to debug this problem?
>
> Can you put in some printf's in the code and see how far it gets?

Specifically, the places to add printf's are to main() in main.c and 
go_to_protected_mode() in pm.c.

	-hpa
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