Сделал:
layman -a x11
echo '=media-libs/mesa-9999 **' >> /etc/portage/package.accept_keywords
echo '=media-libs/mesa-9999' >> /etc/portage/package.unmask
gentoo / # emerge -av =media-libs/mesa-9999
* IMPORTANT: 10 news items need reading for repository 'gentoo'.
* Use eselect news read to view new items.
* IMPORTANT: 3 config files in '/etc/portage' need updating.
* See the CONFIGURATION FILES section of the emerge
* man page to learn how to update config files.
These are the packages that would be merged, in order:
Calculating dependencies... done!
emerge: there are no ebuilds to satisfy "=media-libs/mesa-9999".
В layman какой-то регресс есть еще, я его откатил до 2.2.0-r7
ЧЯДНТ?