Your system seems to be missing critical device files in /dev ! Although you may be running udev or devfs, the root partition is missing these required files !
To rectify this situation, please do the following: mkdir /mnt/fixit mount --bind / /mnt/fixit cp -a /dev/* /mnt/fixit/dev/ umount /mnt/fixit rmdir /mnt/fixit
You may refer to these instructions at /etc/issue. If you previously had an issue file, it has been backed up at /etc/issue.devfix. Once you've fixed your system, you will have to restore your old issue file in order to get rid of this warning.
Thanks for using Gentoo ! :) http://bugs.gentoo.org/show_bug.cgi?id=40987
Who can help?