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[Margarita Manterola <marga@xxxxxxxxxx>]

After a few more hours chasing this bug, I was able to trigger it under
my freshly installed ubuntu running unity by disabling the sync to
vblank option in the OpenGL compiz plugin.

In my opinion, that option makes redrawings happen a little bit later
(because they have to sync to vblank) and thus it makes it less likely
that the bug would trigger.  However, it's enabled in my other faulty
installation, and I still get the bug, so I strongly believe that
whatever introduces delays in the redraws makes the bug less likely but
it's not really fixing anything.  And there are other issues that might
make the bug more likely (which I haven't yet found).

The best reproduction case I've found is to run a weechat session inside
a tmux inside an ssh session in gnome-terminal, and scrolling up and
down the content of this weechat log.  When the setup is in the 'quite
likely' state for reproducing the bug, it will happen within 2 or 3
minutes of scrolling up and down.  When it's less likely, it can take a
while until it happens.

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https://bugs.launchpad.net/bugs/861268

Title:
  text corruption in terminals (xterm, urxvt) and emacs

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