In /boot/initrd.img-3.0.0-8-generic/scripts/init-bottom/udev I see these two lines:
# Stop udevd, we'll miss a few events while we run init, but we catch up
udevadm control --exit
Just a wild speculation, because I haven't yet digged into the interactions between kernel and udevd, but the semaphore decrementation event might be lost when transitioning from the initrd-udevd to the rootfs-udevd.
In /boot/initrd. img-3.0. 0-8-generic/ scripts/ init-bottom/ udev I see these two lines:
# Stop udevd, we'll miss a few events while we run init, but we catch up
udevadm control --exit
Just a wild speculation, because I haven't yet digged into the interactions between kernel and udevd, but the semaphore decrementation event might be lost when transitioning from the initrd-udevd to the rootfs-udevd.