Bug 731795

Well, if /lib/modules/3.0.0-1.fc16.x86_64/modules.dep is missing, then you built your own kernel and forgot "depmod -a" or the kernel image is broken.

$ rpm -q kernel-3.0.0-1.fc16.x86_64 --scripts|fgrep depmod
/sbin/new-kernel-pkg --package kernel --mkinitrd --dracut --depmod --update 3.0.0-1.fc16.x86_64 || exit $?


... so new-kernel-pkg failed to depmod and build the initramfs.

I had the same symptoms on my upgrade.  I did a preupgrade script upgrade, but for some reason I was left without an initramfs file.

Extracting the script line from the package (rpm -q kernel-VERSION --scripts) followed by grub2-mkconfig 'cured' the problem for me to regenerate and configure the initramfs file for the 3.1 kernel.

I don't know why the upgrade itself failed though.

This was on a virtual machine, once disk, msdos partition, "physical" boot partion + lvm virtual host.

(In reply to comment #3)
> I had the same symptoms on my upgrade.  I did a preupgrade script upgrade, but
> for some reason I was left without an initramfs file.
> 
> Extracting the script line from the package (rpm -q kernel-VERSION --scripts)
> followed by grub2-mkconfig 'cured' the problem for me to regenerate and
> configure the initramfs file for the 3.1 kernel.
> 
> I don't know why the upgrade itself failed though.

I suspect that this is yet another symptom of seriously buggy code in grubby which causes the wrong root UUID to be inserted in /boot/grub2/grub.cfg for the updated kernel. A typical report of this is bug #751875

I suspect many obscure/undiagnosed bug reports after kernel upgrade have this source: it was only after struggling in vain for some time that I happened to discover that the wrong UUID had been inserted for root partition when I used 'yum updated kernel'. Since then it has happened every time, and I then have to edit the /boot/grub2/grub.cfg menu to fix the UUID for root. It leaves the older menu entries unchanged, but selects the UUID for a partition I had previously used for root in fedora 15. In this situation I suspect most users never discover the cause of their inability to boot into a new kernel, not least because the UUID will not be immediately recognisable as wrong.

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