[yocto] udev not starting on first boot

[Marc Ferland]

Hi,

I'm currently upgrading from 1.3 to 1.4 and I'm having some issues on
the first boot because it seems udev won't start.

I'm using udev 182 from meta/recipes-core/udev. The system uses a
read-only root filesystem (squashfs) paired with a RW partition joined
together with AUFS to give the illusion of a RW filesystem.

The system is not configured with 'read-only-rootfs'.

On the first boot no /var/run/udev is created clearly showing that udevd
wasn't started.

At first sight it seems to be caused by the fact that populate-volatile
is called after udev, so some symlinks could be missing... that or some
weird race issue.

Any ideas?

Marc