[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 #14 from liulei <lei.a.liu at intel.com> ---
Excuse my stupid debug method i add two lines log message. 
printk(KERN_WARNING "fb_info %p registered_fb  %p",fb_info,registered_fb[i]);
if (i < 0 || i >= FB_MAX || ( registered_fb[i] != fb_info ))
                return -EINVAL;
printk(KERN_WARNING "Pass this line?" );

On HSW, log shows 
[   2.082948]fb_info ffff8801454fc800 registered_fb ffff8801454fc800 (this is
last line)

On BDW, log shows 
[   27.535818] fb: switching to inteldrmfb from EFI VGA
[   27.535821] fb_info ffff880149e06000 registered_fb  ffff880149e06000
[   27.673416] Pass this line?
[   27.673418] Console: switching to colour dummy device 80x25

My last comment based on HSW machine debug, may be it's not accurate.I will
feel such grateful, if someone takes a minute to educate me why this happen.

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