Hi, just to add to this, upgrading from Ubuntu 17.04 to 17.10 worked for me (using Parallels 13.1.1 on macOS High Sierra), and I encountered no problems doing so.
To be on the safe side, I uninstalled Parallels Tools before proceeding with the upgrade, by entering this in terminal:
Code:
sudo /usr/lib/parallels-tools/install -r
Next, I just followed the Ubuntu 17.10 upgrade process and, after about a one minute reboot delay after reinstalling Parallels Tools, everything is working fine. Graphics acceleration & copy&pasting between OSes seems to be working too. (Update: Automatic login isn't working correctly for me even after following solutions in this thread. Also, the Parallels window needs to be made smaller, than maximized, every time I start 17.10 to get the optimum resolution).
Last edited: Oct 26, 2017