The release notes are at https://wiki.ubuntu.com/GutsyGibbon/RC.  I
think it's a good suggestion to mention this issue in the Caveats
section, in a short and constructive manner.  Would you mind taking a
shot at creating an initial draft of the text to go in here?

Given the plan of putting out a release note and fixing this in a post-
release update, we need to approach this bug a little differently.
First, we need to focus on finding "regression-free" fixes or
workarounds.  We will have made mention of the issue in the release
notes, so it would not be good to put out a fix that risks just moving
the bug to a new, unknown location.  Second, I think we need to ensure
when we apply a fix, we have a deep understanding of *why* it works;
otherwise, we won't have confidence that we're truly fixing the root
cause.

I posted about this issue to the xorg@ mailing list last night, to get
advice.  Unfortunately, there's not been very little response.

So far, the best attack angle we have are Juan Pablo's backtraces.
These give tangible, deep information into the issue, that could
possibly identify a real solution.  I'm going to be focusing on this
angle.  I would encourage others who wish to help solve this issue to
follow Juan Pablo's approach and try to also gain backtraces like his.

unggnu, thanks for investigating the angle of removing the overlay fix.
However it sounds like that is more a fix for bug 141063 than this one.
Also, since presumably removing the fix would result in returning the
original bug that it fixed, it couldn't be considered regression-free.

Jose, it's quite interesting that enabling EXA seems to reduce the
frequency of the issue, and that might provide a clue.  However, EXA is
another new technology with its own collection of issues, and given that
we're dealing with issues from immature code, I don't think it's wise to
solve it by adding in more immature code without having a deep
understanding of why it makes it work.  Also, if it requires dropping
patch 120 from xserver, we'll get that regression for XAA users.

Tim, if you can identify which config variable in /etc/gdm/gdm.conf to
switch, then other users could test that.  However, it's hard to change
gdm behavior without causing a regression somewhere, so this likely
contains some regression risk as well.  But it might be worthwhile to
identify as a workaround, if we can get several of us to validate it.

-- 
laptop hangs when switching video mode
https://bugs.launchpad.net/bugs/127101
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