I already posted this a while ago, udev still doesn't make the nvidia0 and nvidiactl devices, I have reported this some while ago and I can understand that this leads to a non-working X.org for people that don't know they need these two devices with the nvidia driver. Though this thing always worked, why doesn't it work anymore (over two months)?
udev version missing, emerge --info output missing as well.
Portage 2.1_pre1 (default-linux/x86/2005.0, gcc-3.4.4, glibc-2.3.5-r3, 2.6.14-gentoo i686) ================================================================= System uname: 2.6.14-gentoo i686 AMD Athlon(tm) processor Gentoo Base System version 1.12.0_pre12 distcc 2.18.3 i686-pc-linux-gnu (protocols 1 and 2) (default port 3632) [disabled] dev-lang/python: 2.3.5, 2.4.2 sys-apps/sandbox: 1.2.17 sys-devel/autoconf: 2.13, 2.59-r7 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r1 sys-devel/binutils: 2.16.1-r1 sys-devel/libtool: 1.5.22 virtual/os-headers: 2.6.11-r3 ACCEPT_KEYWORDS="x86 ~x86" AUTOCLEAN="yes" CBUILD="i686-pc-linux-gnu" CFLAGS="-O3 -march=athlon-tbird -pipe -fomit-frame-pointer" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3/share/config /usr/lib/X11/xkb /usr/share/config /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d" CXXFLAGS="-O3 -march=athlon-tbird -pipe -fomit-frame-pointer" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig ccache distlocks sfperms strict" GENTOO_MIRRORS="ftp://ftp.snt.utwente.nl/pub/os/linux/gentoo ftp://sunsite.informatik.rwth-aachen.de/pub/Linux/gentoo ftp://ftp.wh2.tu-dresden.de/pub/mirrors/gentoo" MAKEOPTS="-j1" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="x86 3dnow 3dnowext X a52 aac acl alsa apm audiofile avi bitmap-fonts bmp bpm bzip2 cdr crypt cups curl divx4linux dv dvd emboss encode ethereal exif expat f77 fam ffmpeg flac foomaticdb fortran gd gif glitz glut gmp gnutls gstreamer gtk gtk2 idn imagemagick ipv6 jack joystick jpeg junit lcms ldap libcaca libg++ libsamplerate libwww lirc mad mhash mikmod mmx mmxext mng motif mp3 mpeg ncurses nls nptl nptlonly nsplugin nvidia odbc ogg oggvorbis openal opengl oss pam pcre php pic png postgres quicktime readline recode scanner sdl slang softmmu speex spell sqlite ssl svg tcpd theora threads tiff truetype truetype-fonts type1-fonts udev usb userlocales vorbis win32codecs wmf xml xml2 xprint xv xvid zlib elibc_glibc kernel_linux userland_GNU" Unset: ASFLAGS, CTARGET, LANG, LC_ALL, LDFLAGS, LINGUAS sys-fs/udev-078 (latest I guess)
nvidia has nothing to do with udev, it's an nvidia issue, not a udev one. *** This bug has been marked as a duplicate of 80026 ***