[arch-general] Upgrade finish in a "Kernel Panic - not syncing : no init found"

[Tom Gundersen]

On Fri, Mar 22, 2013 at 11:00 PM, Dany De Bontridder <dany118 at gmail.com> wrote:
> I reinstalled 2 weeks ago arch linux, because a pacman -Syu broke everything.
>
> Today,  everything works fine and I decide to keep my PC up-to-date,
> so I run pacman -Syu and I get a message when trying to boot
>
>  *** Kernel Panic - not syncing : No init found. ***
>
> Of course, because I saved the list of the packages before and after
> this upgrade, (with pacman -Qe) I tried to downgrade, but it doesn't
> work at all.
>
> I still have the same message error, I checked and changed the
> grub.cfg without no success : the rootfs is correct, the init is on
> /dev/sda2 (a link to /usr/lib/systemd/systemd)
>
> So I tried to append to vmlinuz line "init=3" "init=/sbin/init"
> "init=/usr/lib/systemd/systemd" ... Without any success even when
> downgrading the kernel version (from 3.8 to 3.7)
>
>
> I can of course reinstall everything but I prefer to avoid that,
> someone can help me please ??? I really don't understand what
> happened.

Out of interest: did you try booting a live-medium and chrooting into
your install? Were you able  to enter the chroot? What filesystem do
you use.

FWIW, I have observed a fun problem (I think related to btrfs) where
no binaries work at all. Turned out to be due to /etc/ld.so.cache
being messed up, and any access to it returned "bus error" (or
something like that). Deleting the file fixed the problem.

I have been meaning to file a bug report about that so the cache will
be simply ignored when it is not working, but I haven't gotten around
to it...

-t