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?
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