Comment 5 for bug 831516

I think that despite the use of this last update, I am still affected by this error
I use: extract of the package
-----------------------------
Package: udev
Priority: required
Section: admin
Installed-Size: 1468
Maintainer: Ubuntu Developers <email address hidden>
Architecture: amd64
Version: 173-0ubuntu2
Depends: libacl1 (>= 2.2.51-3), libc6 (>= 2.10), libglib2.0-0 (>= 2.16.0), libselinux1 (>= 1.32), upstart-job, libudev0 (>= 173), module-init-tools (>= 3.2.1-0ubuntu3), initramfs-tools (>= 0.92bubuntu63), procps, adduser, util-linux (>> 2.15~rc2)
Suggests: watershed
Filename: pool/main/u/udev/udev_173-0ubuntu2_amd64.deb
Size: 340936
MD5sum: 94cdab718444765dff12803080387307
SHA1: 1c55b087e9fb33ef814e49be236b5613294e9f70
SHA256: 41db7fe51cc7a0757761cc50234e2f6975e0b951e594f83823c77293702fbd5f
Description: rule-based device node and kernel event manager
 udev is a collection of tools and a daemon to manage events received from
 the kernel and deal with them in user-space. Primarily this involves
 creating and removing device nodes in /dev when hardware is discovered or
 removed from the system.
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I make an installation from the 'alternate dailly' on with lvm partitions. The root directory is: /dev/mapper/vaio-root

at startup I have a list of error:
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udevd[207]: failed to execute '/lib/udev/input_id' 'input_id /devices/LNXSYSTEM:00/device:00/PNP0C0C:00/input/input1': not such file or directory

udevd[208]: failed to execute '/lib/udev/input_id' 'input_id /devices/LNXSYSTEM:00/device:00/PNP0C0C:00/input/input0': not such file or directory

udevd[224]: failed to execute '/lib/udev/input_id' 'input_id /devices/LNXSYSTEM:00/device:00/PNP0C0C:00/input/input0/event0': not such file or directory

udevd[220]: failed to execute '/lib/udev/input_id' 'input_id /devices/LNXSYSTEM:00/device:00/PNP0C0C:00/input/input1/event1': not such file or directory

udevd[254]: failed to execute '/lib/udev/input_id' 'input_id /devices/plateform/i8042:serio0/input/input2': not such file or directory

udevd[256]: failed to execute '/lib/udev/input_id' 'input_id /devices/plateform/i8042:serio0/input/input2/event2': not such file or directory

udevd[277]: failed to execute '/lib/udev/input_id' 'input_id /devices/virtual/input/mice': not such file or directory

Gave up waiting for root device. Common problems:
 - Boot args (cat /proc/cmdline)
   - Check rootdelay= (did the system wait long enough?)
   - Check root= (did the system wait for the right devive?)
 - Missing modules (cat /proc/modules; ls /dev)
ALERT! /dev/mapper/vaio-root does not exist. Drpping to a shell!
------------------------------------------------

/dev/mapper/ is empty !

lvm2 is not active at boot