After more investigation I believe this is an xorg problem with the
radeon driver.   I'm posting the text present in the xorg bug report
since I found a tempoary workaround.  I believe at this time this bug
report against 2.6.22-14 can be closed as it appears not related at all
to #129910.

Whenever I switch to a vt terminal my display goes white.  The display appears 
uninitialized as the color slowly fades, starting in the middle, until the 
whole screen is white.  When I switch back to the X server everything is fine 
and the display comes back, until I do a vt switch again.  The actual terminals 
are responsive so I can login blind and it works.
  
  Workarounds:
    I found this by chance.  If I use the radeontool command and do a 
      sudo radeontool light off
      sudo radeontool light on
    the display comes back and everything looks fine.  So now, before I need to 
switch to a terminal I run this in an X term, then switch:
      sleep 5 && sudo radeontool light off && sleep 5 && sudo radoentool light 
on
  
    Another workaround I found is that if I plug in an external monitor and 
direct X on to that, I can do a VT switch without this issue.  The external 
monitor goes blank and the console appears on the laptop.
    
  This started with my gutsy upgrade to xorg 1.3.0.  I have a "ATI Technologies 
Inc Radeon R250 [Mobility FireGL 9000]" running the opensource radeon driver.  
  
   Module radeon: vendor="X.Org Foundation"
        compiled for 1.3.0, module version = 4.3.0
  
  
  01:00.0 VGA compatible controller: ATI Technologies Inc Radeon RV250 
[Mobility FireGL 9000] (rev 02)

-- 
No TTY access, not using framebuffer
https://bugs.launchpad.net/bugs/156726
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