OK I have found the problem.
If I wait long enough and type exit in the (initramfs) prompt, it does
boot. However everyday I have to wait more and more. This is because of
the LVM snaphshot of the root FS whose size increase when the difference
between the snapshot and the current status grow. With each update I get
a larger snapshot usage and it takes longer for the LVM device to be
initialized. This is very ironical since I created this snapshot to be
protected against potential breakage from updates (originally especially
backports and PPAs). Now I have deleted the snapshot and everything work
fine.
That is however not a very satisfactory solution. I could increase the
ROOTDELAY but this has to be adjusted with the snapshot usage size or
put to a very large value.
Is there any other way around this. I know if I convert my FS to btrfs,
there is apt-btrfs-snapshots for reverting updates but I think this is
still experimental in 14.04. What is the recommended way of taking
snapshots of the system in 14.04? If it's LVM, then some fix should be
implemented.
** Package changed: glibc (Ubuntu) => grub2 (Ubuntu)
** Changed in: grub2 (Ubuntu)
Status: New => Opinion
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https://bugs.launchpad.net/bugs/1421877
Title:
boot fails with lvm root device in /dev/mapper not found after update
of libc-bin
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