Public bug reported:

I installed overlayroot on a clean 13.04 on a USB drive and activated it
by configuring overlayroot="tmpfs" to overlayroot.conf.

At boot, sometimes (50%) there is no graphical screen (in auth.log
pam_unix complains that lightdm conversation failed). Also sound does
not work (a dummy driver is in the sound settings). Also sometimes the
system does not boot (kernel panic: unable to handle kernel paging
request at ffff88013494ffe0).

When overlayroot is deactivated using the kernel parameter
"overlayroot=", then the system works well.

** Affects: cloud-initramfs-tools (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1188756

Title:
  No graphical screen and no sound when overlayroot is active

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