Kernel Panic main-n252492-ad15eeeaba3

I just updated today to main-n252492-ad15eeeaba3 from:

main-n252313-ae13829ddce on 3 PC's.

Two of them had the update go well but my Dell Inspiron 1545 had a panic 
after booting.  This laptop doesn't have a scroll buffer and the entire 
panic message scrolls off the screen, so can't take a screen photograph. 
  I compared the logged messages, I see this difference:

ERROR :intel_cpu_fifo_underrun_irq_handler] CPU pipe B FIFO underrun

In the /var/log/message on the laptop startup with the panic.  All of 
the other successful startups on this PC, don't contain this error 
message.  I tried both a GENERIC and GENERIC-DEBUG kernels with the same 
results.  The other computers running main-n252492-ad15eeeaba3 don't 
have this message and all of them successfully boot after the update. 
It looks like my project tomorrow will involve an exercise in revert and 
bisect.

Tom

-- 
Public Keys:
PGP KeyID = 0x5F22FDC1
GnuPG KeyID = 0x620836CF