[Bug 81140] [HSW/BYT/BDW Bisected ]system sporadically boot fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81140

--- Comment #16 from liulei <lei.a.liu at intel.com> ---
(In reply to comment #15)
> Created attachment 102667 [details] [review]
> Trace fb comings and goings
> 
> Try this patch to see what tale it gives for the efifb.
There is nothing different output. If i translate output to serial port output
will show as below:

[   26.895983] ACPI: Power Button [PWRF]
[   26.898922] [drm] Memory usable by graphics device = 4096M
[   26.898923] [drm] Replacing VGA console driver
[   27.449211] fb: switching to inteldrmfb from EFI VGA
[   27.509560] Unregistering EFI VGA framebuffer
[   27.509577] Console: switching to colour dummy device 80x25

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