Alright,

I did this:

root@devuan:~# mkdir -p /tmp/initrd
root@devuan:~# cd /tmp/initrd
root@devuan:/tmp/initrd# zcat /boot/initrd.img-4.7.0-0.bpo.1-686 | cpio
-idmv 2>/dev/null
root@devuan:/tmp/initrd# ls
bin conf etc init lib run sbin scripts
root@devuan:/tmp/initrd# find . | cpio -o -c | xz -9 >
/boot/initrd.img-4.7.0-0.bpo.1-686.xz
281152 blocks
root@devuan:/tmp/initrd# ls -l /boot/initrd.img-*
-rw-r--r-- 1 root root 14795981 dic 15 08:17 /boot/initrd.img-3.16.0-4-586
-rw-r--r-- 1 root root 15916152 dic 15 07:57
/boot/initrd.img-4.6.0-0.bpo.1-686
-rw-r--r-- 1 root root 16239683 dic 16 09:32
/boot/initrd.img-4.7.0-0.bpo.1-686
-rw-r--r-- 1 root root 11799196 dic 16 11:08
/boot/initrd.img-4.7.0-0.bpo.1-686.xz
root@devuan:/tmp/initrd# file /boot/initrd.img-4.7.0-0.bpo.1-686.xz
/boot/initrd.img-4.7.0-0.bpo.1-686.xz: XZ compressed data

Sadly, booting with the 4.7 kernel and this new .xz initrd didn't work
either.


On Fri, Dec 16, 2016 at 10:56 AM, KatolaZ <katolaz@???> wrote:

> On Fri, Dec 16, 2016 at 10:13:05AM -0300, Emiliano Marini wrote:
>
> >
> > I tried the 4.6 kernel with the 4.7 initrd and it almost boot (at the end
> > init cannot access the root fs device). But the 4.6 kernel extracts the
> 4.7
> > initrd and loads de init process. This leads me to think it's a kernel
> > issue.
> >
> > Tried booting the 4.7 to /bin/sh. Same results. It seems it cannot
> extract
> > the initrd?
>
> Yes, it seems that the kernel cannot extract the initrd, because (very
> weird!) for some reason the 4.7 kernel you are trying to use lacks
> builtin support to extract gzip (???). This looks pretty weird, but
> might explain the problem.
>
> You should try to compress the initramfs with either bz2 or xz. It
> seems that xz-utils is not installed in your system, so you should
> first
>
> apt-get install xz-utils
>
> and then recreate the initramfs again. If xz is available, initramfs
> should try to compress the initramfs with xz. Hopefully, the 4.7
> kernel you are trying to install will have at least xz support...
>
> LetUsKnow
>
> My2Cents
>
> KatolaZ
>

> --
> [ ~.,_  Enzo Nicosia aka KatolaZ - GLUGCT -- Freaknet Medialab  ]
> [     "+.  katolaz [at] freaknet.org --- katolaz [at] yahoo.it  ]
> [       @)   http://kalos.mine.nu ---  Devuan GNU + Linux User  ]
> [     @@)  http://maths.qmul.ac.uk/~vnicosia --  GPG: 0B5F062F  ]
> [ (@@@)  Twitter: @KatolaZ - skype: katolaz -- github: KatolaZ  ]

>