[Bug 810221] Re: Video output stops on real root after July 12 udev changes

Steve Langasek steve.langasek at canonical.com
Thu Jul 14 17:23:39 UTC 2011


This is not a bug in plymouth; the problem is that with the new
initramfs-tools upload, /dev/.initramfs is no longer being transferred
correctly from the initramfs to the rootfs, with the result that upstart
is no longer able to track the PIDs of services that were started in the
initramfs and carried over.  In particular, this affects bootchart and
plymouth.

initramfs-tools needs to be fixed to restore compatibility with the old
/dev/.initramfs directory, and only afterwards should upstart,
bootchart, and plymouth have a coordinated migration to use /run in
place of /dev/.initramfs.

** Package changed: plymouth (Ubuntu) => initramfs-tools (Ubuntu)

** Changed in: initramfs-tools (Ubuntu)
   Importance: Undecided => High

** Changed in: initramfs-tools (Ubuntu)
       Status: New => Triaged

** Changed in: initramfs-tools (Ubuntu)
     Assignee: (unassigned) => Martin Pitt (pitti)

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https://bugs.launchpad.net/bugs/810221

Title:
  Video output stops on real root after July 12 udev changes

Status in “initramfs-tools” package in Ubuntu:
  Triaged

Bug description:
  In Ubuntu Oneiric, since the July 11/12 udev, initramfs-tools,
  basefiles (/var/run to /run ) changes, plymouth flickers to black,
  causing all video output to cut off ("no signal" report from monitors)
  until /etc/init/plymouth-upstart-bridge.conf runs, restarting video
  output.

  If /etc/init/plymouth-upstart-bridge.conf  is disabled as a test,
  video does not resume at all, showing this to be what is bringing it
  back.

  Booting with splash removed from the grub command line produces
  continuing video output without this flicker, though no script for
  logging output with plymouth produces output during this time (as my
  scripts normally would on console).

  Thus, it seems that either plymouth needs to be patched to adapt to
  the /run changes, or that there is a problem elsewhere concerning
  video devices during this transition.

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