Comment # 1 on bug 1041742 from Michael Andres

(In reply to Dominique Leuenberger from comment #0)
> zypper in --no-recommends gdm => the file trigger is not executed
> rpm -i gdm-3.24.1.rpm         => the trigger actually seems to work (which
> is why I file it against libzypp)

If a package contains a %posttrans script, zypp passes '--noposttrans' to the
rpm install command. Maybe this disturbs? I don't know what else in libzypp
could influence this, as we don't use librpm, but exec 'rpm' to install the
package.

The exact rpm command is visible in the zypper.log (grep "Executing 'rpm'"
/var/log/zypper.log).