From alsa guide: "Note: Since the 2005.0 release, Gentoo Linux uses 2.6 as the default kernel. Please check that your kernel is a 2.6 series kernel. This method will not work on a 2.4 kernel. " I think, now Gentoo Linux uses 3.0 as default kernel? Not sure about Mips/Alpha/so on, but x86/amd64 do Reproducible: Always
Sorry, 3.x as default kernel
Since sys-fs/udev is the default provider of virtual/udev and gets installed by default, then the default kernel is 2.6.39 at minimum Starting with current stable, udev-197-r3 While this document[1] is a bit outdated, it still already says: "udev is meant to be used in combination with a 2.6 and 3.x kernel" http://www.gentoo.org/doc/en/udev-guide.xml So yeah, it could be changed to say "2.6 and 3.x kernel" like in the udev guide
I've updated the guide to just drop mentioning 2.6 (except at the beginning, but that's general introduction).