[Bug 199700] [NEW] xrandr changes break composite on 2nd head

[Launchpad Bug Tracker]

You have been subscribed to a public bug by Daniel Holbach (dholbach):

The composite overlay window is only allocated once, at server start up.
Should the user change the screen layout using xrandr, the COW will no
longer cover the whole framebuffer.  This means that when the user is
running a composite manager using the COW (compiz, metacity and I think
KWin4) no windows will be drawn on areas not covered by the COW - for
example, the second head if the user has run "xrandr --output DVI-D-0
--right-of LVDS-0".

This Xorg bug http://bugs.freedesktop.org/show_bug.cgi?id=4394 covers
this in more detail, and has a patch which is applied to Xorg git which
resizes the COW on xrandr changes.  I'll provide a debdiff against our
xorg-server applying this patch.

** Affects: xorg-server (Ubuntu)
     Importance: High
     Assignee: Timo Aaltonen (tjaalton)
         Status: Fix Released

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xrandr changes break composite on 2nd head
https://bugs.launchpad.net/bugs/199700
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