they fixed the stuttering problem but i still don't have networking ("network is unreachable"). this is true for both a fedora 29 guest and a centos 7 guest. so the problem isn't OS-specific. i've done all the typical stuff (reset the virtual interfaces) but it had no effect. i haven't tried to reinstall workstation yet. in addition to the networking problem, booting fedora 29 doesn't work smoothly. the login screen doesn't show up unless i pause & restart the VM. centos 7 works without a problem.
/mark