Bug#917261: linux-image-4.19.0-1-amd64: /dev/mapper symlink for dm-crypt volume containing / not created on system startup

[Ben Hutchings]

On Wed, 2018-12-26 at 21:57 -0500, Celejar wrote:
> On Wed, 26 Dec 2018 15:39:19 +0000
> Ben Hutchings <ben at decadent.org.uk> wrote:
> 
> > On Tue, Dec 25, 2018 at 09:58:33PM -0500, Celejar wrote:
> > > On Tue, 25 Dec 2018 20:52:46 +0000
> > > Ben Hutchings <ben at decadent.org.uk> wrote:
> > > 
> > > > Control: reassign -1 udev 240-1
> > > > Control: forcemerge 917124 -1
> > > > 
> > > > This seems to be a bug in udev, not the kernel.  You will only have
> > > > noticed it once you rebooted for the kernel upgrade.
> > > 
> > > Nope - in my system's current state, when rebooting into 4.19 there's
> > > no /dev/mapper symlink, but when rebooting into 4.18 there is. I've
> > > gone back and forth several times, and the behavior is consistent.
> > > There's clearly something that 4.19 is doing differently from 4.18. [I
> > > guess it might still be a udev bug, which is being exposed by some
> > > change in 4.19.]
> > 
> > This is probably because the initramfs for 4.18 contains the old
> > version of udev.
> 
> Okay, I think I understand. So if I were to update the 4.18 initramfs
> (with update-initramfs -k 4.18-nnn) now, I would expect to see the same
> problem with that kernel?

Yes.

And if you downgrade udev and libudev1 to version 239-15, that will
trigger an update of the 4.19 initramfs (only) and you should then be
able to boot with Linux 4.19.

Ben.

-- 
Ben Hutchings
Life is what happens to you while you're busy making other plans.
                                                          - John Lennon


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