Hello, there I had a problem with my new d630 I brought it with hight screen resolution and of course got a problem when the screen after installing EDP 2.2 was white. 
I had found custom dsdt here for 1440 resolution and replaced original EDP dsdt, but the laptop was freezing unexpectable without any reason. 
  
A thread about X3100 at projectosx shows nice patch for the DSDT. http://www.projectosx.com/forum/index.php?showtopic=1294&st=0&p=8348entry8348 
  
So I replaced: 
 
"AAPL01,DualLink", 
                           Buffer (0x04)
                           {
                               0x00, 0x00, 0x00, 0x00
                           },
 
  
with: 
 
"AAPL01,DualLink", 
                           Buffer (0x04)
                           {
                               0x01, 0x00, 0x00, 0x00
                           },
 
by DSDTSE and recompiled it. There're 2 places for the DualLink inside DSDT. 
Now everything works great. 
  
Hope it will help somebody cuz I wasted plenty of time. 
  
P.S. I didn't try 64bit mode