Comment 2 for bug 1531462

The only way I found is to upgrade manualy from 15.04 to 15.10 with "apt-get" command from a backup:
- update and upgrade vivid ("apt-get update && apt-get upgrade")
- test my configuration with "dpkg --audit"
- comment all external repositories on /etc/apt/sources.list.d/
- change all "vivid" to "wily" references in /etc/apt/sources.list file
- do an "apt-get update" and an "apt-get upgrade"
- reboot
- do an "apt-get dist-upgrade"
- reboot
- clean configuration with a "apt-get autoremove"
- reboot
- wash configuration with a "orphaner" (deborphan package)
- purge configuration with "aptitude purge ~c"
- reboot
- re-activate externals reposities on /etc/apt/sources.list.d/ with "add-apt-repository" for PPA one on manualy ti the other
- re-install VMware Tools from ISO (not from reprository)

Happy new year