On Sun, 23 Jan 2022 21:20:56 +0100
Florian Zieboll via Dng <dng@???> wrote:

> On Sun, 23 Jan 2022 20:29:39 +0100
> aitor <aitor_czr@???> wrote:
>
> > If the name swap happens randomly, then the required setting might
> > be:
> >
> > RESUME=none
> >
> > instead of:
> >
> > resume=UUID=<correct UUID here>
> >
> > in your /etc/initramfs-tools/conf.d/resume
> >
> > HTH,
> >
> > Aitor
>
>
>
> Thank you Aitor, that was the crucial hint, the 'RESUME' variable is
> upper case... of course: an environment variable! So my system boots
> fine and fast again and also suspend/resume works.
>
> Still, when I have the 'RESUME' variable defined correctly in
> '/etc/initramfs-tools/conf.d/resume', 'update-initramfs -u' does not
> return anything but
>
> update-initramfs: Generating /boot/initrd.img-5.10.0-11-amd64
>
> while with the lowercase spelling (as well as with an empty config),
> it additionally returns the (also formerly quoted) info lines
>
> I: The initramfs will attempt to resume from /dev/sdb1
> I: (UUID=a743df91-ac0a-419b-95e7-5c266447e543)
> I: Set the RESUME variable to override this.
>
> but this "attempt" then fails for some reason, although the initramfs
> should have the correct info (and IIRC should just try the first
> available swap partition anyway.)
>
> Thanks again and libre Grüße,
> Florian

PS: Also the reason for the (temporarily) not persistent block device
    names is still absolutely unclear to me.