[HSW issue] Can not turn on LVDS panel with kernel 3.8-rc2 on some ivybridge NB

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Hi,

I use kernel 3.8-rc2 with haswell support in currently linux os, but the kernel will cause black screen on LVDS panel, and the eDP panel is right.
Another word, the haswell patch in kernel 3.8 can not turn on LVDS panel on some sample. Can anybody help me for this issue?
The test platform hardware spec as the following table.


       CPU   Intel(R) Core(TM) i3-3110M CPU @ 2.40GHz 
       Platform   Intel Ivybridge Chipset 
       RAM  6 GB DDR3 
       HDD  Hitachi HTS543232A7A384 ( 320.1 GB) 
         
       VGA  Intel Corporation Device [8086:0166] (rev 08) 
          
       Audio   Intel Corporation Panther Point High Definition Audio Controller [8086:1e20] (rev 04) 
       Audio codec   Codec:Codec: Realtek ALC269VB
       Vendor ID:0x10ec0269
       Subsystem ID:0x1025064b
       Revision ID:0x100100 



Rgds,
Lawson
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