On Friday 24 Jun 2011 10:34:50 Neil Bothwick wrote:
> On Fri, 24 Jun 2011 05:05:13 -0400, Matthew Finkel wrote:
> > Did you try remerging evdev? I believe there's another package you need
> > to reemerge also, I can't remember off the top of my head. If some one
> > else doesn't chime in by the time I wake up then I'll look it up.
> 
> If you use portage 2.2, emerge @x11-module-rebuild

or in the words of the elog itself which the OP evidently missed:
================================================================
>>> Messages generated by process 15731 on 2011-06-23 19:30:53 BST for package 
x11-base/xorg-server-1.10.2:

LOG: postinst
You should consider reading upgrade guide for this release:
        http://www.gentoo.org/proj/en/desktop/x/x11/xorg-server-1.10-upgrade-
guide.xml

WARN: postinst
You must rebuild all drivers if upgrading from <xorg-server-1.10
because the ABI changed. If you cannot start X because
of module version mismatch errors, this is your problem.
You can generate a list of all installed packages in the x11-drivers
category using this command:
        emerge portage-utils; qlist -I -C x11-drivers/
or using sets from portage-2.2:
        emerge @x11-module-rebuild
================================================================

HTH.
-- 
Regards,
Mick