@a7x
1. Is your kernel 2.6.22 or newer?  2.6.23.15.  I tried no-scroll but it didn't 
work for me.  After 25 or so lines were written to the console it started 
shifting the screen.

2. Do you have a multiseat setup? Yes, two seats, using nvidia cards
with proprietary driver.

3. Does the screen shift happen every time something is written to
/dev/console, or only occasionally?  The screen will shift to the right
only when the screen needs to scroll.  i.e. after a reboot, you get ~25
writes to the console without shifting, the 26th time and after, the
screen will shift to the right.  Or at least that is what happened to
me.

4. Can you reproduce the screen shift on demand? If so, how?  'echo
"test" > /dev/console'  as root.

5. Based on the messages that appear in xconsole, can you tell what
messages might be causing the shift?  For me it is any message, doesn't
matter where it came from.  Anything that writes to the console and
there are a lot of places that it can come from, will cause it to
scroll.

-- 
(Multiseat) screen shifts when /dev/console written to
https://bugs.launchpad.net/bugs/153425
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