On Mon, 24 Apr 2017 14:49:06 +1000, Ralph wrote in message
<be1216c5-c463-a069-b1e4-f405ee658809@???>:

>
> Arnt Karlsen wrote on 24/04/17 09:13:
> > On Wed, 19 Apr 2017 18:54:07 +0200, Arnt wrote in message
> > <20170419185407.228cd18a@???>:
> >
> >> On Thu, 20 Apr 2017 02:21:53 +1000, Ralph wrote in message
> >> <d3a264ce-a767-dffc-845d-d1eb26027a3e@???>:
> >>
> >>>
> >>>
> >>> Arnt Karlsen wrote on 19/04/17 23:17:
> >>> [cut]
> >>>>
> >>>> ...wiped udev off my box and wound up with a box that boots oh
> >>>> soo fine until it tries to load my new vdev
> >>>> initrd.img-4.9.0-2-rt-amd64 ...am I the first one here to try
> >>>> this on a rt kernel?
> >>>>
> >>>> ..recovery ideas? Do we have any vdev live-cd?
> >>>>
> >>>> ..last time I did this stunt, I chrooted in off a Knoppix? iso,
> >>>> I have memdisk and a few iso links handy in /boot, and Debian's
> >>>> Sid vmlinuz-4.8.0-2-amd64, vmlinuz-4.8.0-2-rt-amd64 and
> >>>> vmlinuz-4.9.0-1-rt-amd64 with systemd-udev initrd's, but they all
> >>>> depend on a working install of udev AFAIK, and I'd prefer pushing
> >>>> thru with vdev rather than going back to udev.
> >>>>
> >>>> ..has anyone here tried downgrading to Debian Wheezy era udev?
> >>>>
> >>>>
> >>>> ..looking for recovery live-cd idea starting points, I came
> >>>> across 32-bit
> >>>> https://debiandog.github.io/doglinux/zz02debiandogwheezy.html
> >>>> which could work both as a starting point for a live-cd and as a
> >>>> starting point for an upgrade path for stuck Debian Wheezy people
> >>>> via "Devuan-0.x Wheezy" to current Devuan-1.x Jessie.
> >>>>
> >>>> ..according to https://debiandog.github.io/doglinux/ "DebianDog
> >>>> is very small Debian Live CD shaped to look and act like Puppy
> >>>> Linux. Debian structure and Debian behaviour are untouched and
> >>>> Debian documentation is 100% valid for DebianDog. You have
> >>>> access to all debian repositories using apt-get or synaptic.",
> >>>> creating "Devuan-0.x Wheezy Live-CD" etc is trivial, toss their
> >>>> repos for ours, update, upgrade and remaster, the 64-bit version
> >>>> likely needs to be built off deb-src lines.
> >>>>
> >>>>
> >>>> ..but first comes the classic chicken-and-egg 64 bit recovery
> >>>> I need now. ;o)
> >>>>
> >>>
> >>> I'm not sure it helps you, but I've made a vdev variant of most
> >>> recent devuan_jessie_RC_amd64_minimal_live.iso (time stamped
> >>> 2017-Mar-27 20:57) that I got from the official mirror
> >>> http://mirror.sfo12.us.leaseweb.net/devuan/
> >>>
> >>> I purged a couple of things from it, then added and installed "my"
> >>> vdev_0.1.1_amd64.deb, and made a refractasnapshot of this, into
> >>> devuan_jessie_RC_amd64_minimal_live_vdev.iso, which is
> >>> downloadable at https://www.uk.realsam.co.uk/files/devuan/
> >>>
> >>> It boots with vdev rather than udev, and udev remains installed,
> >>> though with all its "competing" files tucked away. As you might
> >>> know, this vdev packaging is different from aitor's packaging for
> >>> gnuinos by not declaring a udev competition, but rather attempting
> >>> to manage a dynamic choice of which one is in use. The software is
> >>> otherwise the same, I believe.
> >>
> >> ..thanks, we shall find out. ;o)
> >
> > ..no joy this far, vdev does not work with any of my installed
> > kernels, neither my dpkg variant of your vdev-assistant nor your
> > original restores udev, so I'm stuck with live-CDs when I need to
> > go online to chk things to read up on.
> >
> > ..you packaged your vdev differently than aitor, do I then use
> > your deb(-src) lines in /etc/apt/sources.list and comment out
> > his?
> >
> > ..another approach is ignore apt and dpkg, and simply drop in all
> > files with tar or cpio or somesuch, haven't done that kinda stunt
> > since my RH-5.2 days.
> >
> > ..if that fails, are you able to build me an old fashion monster
> > monolithic kernel with nouveau, vdev and everything else compiled
> > into the kernel, and not as modules, that I can boot without an
> > initrd?
> > Big size is no problem, I have 8GB ram, but no build box.
> >
> > ..if not, what do I need to build a vdev kernel myself on my
> > box running your devuan_jessie_RC_amd64_minimal_live_vdev.iso?
>
> If the live iso works, you can restore udev via chroot to your root
> file system. It's a relatively simple sequence:
> # mnt /dev/sdaX /mnt
> # chroot /mnt
> # mount -t proc none proc
> # mount -t sysfs none /sys
> # mount -t devpts none /dev/pts
> # apt-get install udev
> # apt-get purge *vdev* <-- all aitor's vdev packages

..er, something went wrong here, I forgot? to mention
my bad apt database means doing things rpm-hell style
with dpkg or tarball style, and forgot to umount -v \
/mnt/proc et al before exiting my chroot, and wound
up hitting the power button, on reboot, it decided to
fsck a weird "/rootfs" and failed, so I did one off a
live iso and tried a new boot, and now I just need to
get vdev's mousepad 'n keybd input working in X too,
all is fine in the console. ;oD

> # apt-get install --reinstall udev
> # exit
>
> The end result of that should be that udev is reinstalled to the
> /dev/sdaX root file system, including the update of its initramfs.
> And that your system boots up without fuss. (hopefully)
>
> If then you wish to try vdev again, it is available in
> "experimental"; that's "my" variant. You need to have the
> experimental entry in sources.list, and perhaps a -1 pinning of it in
> the preferences (to avoid gaining other experimental babies), and
> then use explicit "-t experimental" to get it.
> # apt-get install -t experimental vdev
>
> You might also want to consider using eudev instead, which (like
> aitor's vdev packaging) is a full replacement for udev. (afaik
> 'eudev' makes use of the udev rules, and in that way it's much
> friendlier to other products that currently tie in to udev)
>
> All in all, there is nothing needed to be compiled into the kernel
> for vdev or udev (or eudev I think). But if you can't come forward,
> there is also the option of hand crafting an initrd enough to get the
> system pivoting, to let you install/uninstall.
>
> Ralph.


--
..med vennlig hilsen = with Kind Regards from Arnt Karlsen
...with a number of polar bear hunters in his ancestry...
Scenarios always come in sets of three:
best case, worst case, and just in case.