Comment # 8 on bug 1230891 from Michael Andres

(In reply to Stefan Hundhammer from comment #2)
> @sndirsch, @zypp-maintainers: Any good idea to continue here?

A solver testcase will tell which repos are used, which packages are installed,
which are available and why the dup raises a conflict.

Please run 
> zypper dup --debug-solver

Then pack the testcase directory together with the/var/log/zypper.log and
attach it to the bugreport.

> ##
> cd /tmp
> tar cvjf zypper-testcase.bz2 /var/log/zypper.solverTestCase /var/log/zypper.log

In case the testcase exceeds the 10MB limit for bugzilla uploads, you can use
'split' to divide the file into smaller pieces:

> cd /tmp
> split -b 10M --additional-suffix=-zypper-testcase.bz2 zypper-testcase.bz2

The created pieces will be named:

> xaa-zypper-testcase.bz2
> xab-zypper-testcase.bz2
> xac-...