Comment # 10 on bug 953130 from Daniel Faust

I had the same problem, I didn't stop the time but I gave up waiting only after
quite a few minutes. Like Stefan suggested, I checked for old kernel versions
and found a lot. I removed them and after that "checking for file conflicts"
took less than a second.

I wrote down all the packages I removed/installed to fix the problem:

kernel-default, kernel-default-devel
in 4.8.4-1.2-x86_64
rm 4.8.4-1.1-x86_64
rm 4.8.3-1.1-x86_64
rm 4.7.6-1.1-x86_64
rm 4.7.5-1.1-x86_64
rm 4.7.4-2.1-x86_64
rm 4.7.4-1.2-x86_64
rm 4.7.3-1.1-x86_64
rm 4.7.2-2.2-x86_64
rm 4.7.2-1.2-x86_64

kernel-devel, kernel-source
in 4.8.4-1.2-noarch
rm 4.8.4-1.1-noarch
rm 4.8.3-1.1-noarch
rm 4.7.6-1.1-noarch
rm 4.7.5-1.2-noarch
rm 4.7.5-1.1-noarch
rm 4.7.4-2.1-noarch
rm 4.7.4-1.2-noarch
rm 4.7.3-1.1-noarch
rm 4.7.2-2.2-noarch
rm 4.7.2-1.3-noarch
rm 4.7.2-1.2-noarch

kernel-syms
in 4.8.4-1.2-x86_64
rm 4.8.4-1.1-x86_64
rm 4.8.3-1.1-x86_64
rm 4.7.6-1.1-x86_64
rm 4.7.5-1.2-x86_64
rm 4.7.5-1.1-x86_64
rm 4.7.4-2.1-x86_64
rm 4.7.4-1.2-x86_64
rm 4.7.3-1.1-x86_64
rm 4.7.2-2.2-x86_64
rm 4.7.2-1.3-x86_64

virtualbox, virtualbox-qt
in 5.1.6-1.18-x86_64
rm 5.1.4-3.1-x86_64

virtualbox-host-kmp-default
in 5.1.6_k4.8.4_1.18-x86_64
rm 5.1.4_k4.7.2_1-1.3-x86_64

virtualbox-guest-kmp-default
rm 5.1.4_k4.7.2_1-1.3-x86_64

For some reason I had virtualbox-guest-kmp-default installed, which I couldn't
upgrade to the newest version because it had a conflict with
virtualbox-host-kmp-default.
I'll also attach the part of /var/log/zypp/history with today's messages.