[Trac #1457] Screen corruption when DCON takes control under X

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#1457: Screen corruption when DCON takes control under X
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  Reporter:  cjb              |       Owner:  JordanCrouse
      Type:  defect           |      Status:  new         
  Priority:  blocker          |   Milestone:  BTest-4     
 Component:  x window system  |     Version:  Build 406   
Resolution:                   |    Keywords:  dilinger    
  Verified:  0                |  
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Changes (by cjb):

  * verified:  => 0

Comment:

 Dave Woodhouse has figured this one out -- the sync polarity was being set
 wrong by X, with the result that the DCON wasn't taking a snapshot.

 Switching from -HSync -VSync to +HSync +VSync in the xorg.conf gets DCON
 mode working.  The fix isn't that simple, though; we *should* have
 negative hsync/vsync, so the X driver is doing the inverse of what we ask
 for.

-- 
Ticket URL: <http://dev.laptop.org/ticket/1457#comment:3>
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