Comment # 18 on bug 1213438 from Takashi Iwai

OK, thanks.

The link of /boot/vmlinuz and /boot/initrd can be forgotten, as this isn't
really used.  Just check whether both the corresponding /boot/vmlinuz-$VERSION
and /boot/initrd-$VERSION are present.

I'm building yet another kernel with more graphics fix backports.  The package
is being built in OBS home:tiwai:bsc1213438 repo.  Once after the build
finishes (takes an hour or so), the packages will be available at
  http://download.opensuse.org/repositories/home:/tiwai:/bsc1213438/pool/

Please give it a try, too.  You can uninstall the previous test kernels by
"zypper remove" with the exact version.  That is,

   zypper rm kernel-default-5.14.21-150500.1.1.g8d27c97

and it'll remove the given kernel (and *-extra and *-optional are removed
together due to dependency).

Last but not least, when you test more kernel packages, it's safer to increase
the number of installable kernels on your system beforehand.  Edit
/etc/zypp/zypp.conf as root, and modify the line defining multiversion.kernels
to add more items, e.g.

  multiversion.kernels = latest,latest-1,latest-2,latest-3,running

In the example above, it can keep up to 4+1 kernels simultaneously.