# zypper modifyrepo --all --disable

# zypper addrepo --name "openSUSE-12.1 OSS" http://download.opensuse.org/distribution/12.1/repo/oss/ repo-12.1-oss

# zypper addrepo --name "openSUSE-12.1 Non-OSS" http://download.opensuse.org/distribution/12.1/repo/non-oss/ repo-12.1-non-oss

# zypper addrepo --refresh --name "openSUSE-12.1 Updates" http://download.opensuse.org/update/12.1/ repo-12.1-update

# zypper ref && zypper -q dup -d
# init 3
# zypper dup --download-in-advance
# shutdown -r now (to complete the Kernel Update)