$ eselect news read new2013-01-23-udev-upgrade
Title Upgrading udev from 171 (or older) to 197
Author Samuli Suominen
Upgrading udev from 171 (or older) to 197 will require special attention:
- Remove udev-postmount from runlevels.
- The need of CONFIG_DEVTMPFS=y in the kernel; need to verify the fstype for
possible /dev line in /etc/fstab is devtmpfs (and not, for example, tmpfs)
- The case of predictable network interface names; if the file
/etc/udev/rules.d/70-persistent-net.rules is being used for renaming
network interface names to already existing names, then you need to
read following bug because it's no longer possible. This won't
be a problem with the new predictable network interface name scheme.
- Support for older kernels than 2.6.39 is dropped. If you need older kernel
we recommend you to look into sys-fs/eudev or use local overlay for keeping
the old ebuild. Remember to also get the distfiles where the patchsets are.
The upgrade into current stable version of gentoo-sources is recommended.
- The case of separate /usr; if it worked for you with 171 it will continue
to work for you with 197. We still recommend initramfs with separate /usr
mounting capabilities because you might need packages like sys-apps/kbd
(keymaps in /usr) or net-wireless/bluez (possible keyboard) in early boot.
And read every message printed by the emerge of udev and udev-init-scripts
to ensure the system is in order before booting as this news item might
not be complete.
Apologies if this news came too late for you.
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