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