[Trac #621] Flicker free boot

[Zarro Boogs per Child]

#621: Flicker free boot
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 Reporter:  JordanCrouse  |        Owner:  blizzard
     Type:  enhancement   |       Status:  new     
 Priority:  normal        |    Milestone:  BTest-2 
Component:  distro        |   Resolution:          
 Keywords:                |  
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Comment (by JordanCrouse):

 For the kernel - a number of things has to happen.  First, we need to
 avoid clearing the screen and setting the mode if we don't need to.  I
 will be adding a patch to the olpc-2.6 tree that does exactly that.

 Next, an appropriately constructed command line is needed - to avoid
 changing the screen, we need to enable 'noclear' from the patch above, and
 also tell the kernel not to add a VC to tty1:

 fbcon=vc:2 video=gxfb:noclear console=tty2

 This means that we can't run a terminal on tty1 unless we specifically
 enable it with openvt later. (i.e. ctrl-alt-F1 won't take you to a command
 prompt).

 I don't believe thats a large problem - we still have many virtual
 consoles available, many more then we would actually use.

 The end result is that OFW sets up the screen and the kernel doesn't
 change it - resulting in a seemless transition for the viewer.

 Unfortunately the current patch still has one glitch in it - I haven't
 been able to find it, but a shiny new quarter to anybody that does. :)

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Ticket URL: <http://dev.laptop.org/ticket/621#comment:1>
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