SymptomsVideo artifacts, problems with screens resolution or other issues with Parallels Tools functionality in Linux Virtual Machine after installing Updates for Linux.
CauseAfter installing Updates for Linux some of the essential components of Linux, such as kernel and xorg may be changed that leads to their incompatibility with Parallels Tools installed in the Virtual machine.
ResolutionReinstall Parallels Tools.
Go to Virtual machine menu ► Reinstall Parallels Tools
then click Yes to start Parallels Tools reinstallation
Parallels Tools image will be mounted to the Virtual machine as a CD disk
Now launch Terminal and enter the following commands:
$cd /media/Parallels\ Tools
then enter password. Note: you will not see the password on typing it.
Parallels Tools Installer wizard will open and guide you through the steps to reinstall Parallels Tools
Once Parallels Tools are updated you need to reboot your Virtual machine.
To know more about Parallels Tools installation and reinstallation please check Parallels Desktop User's Guide (p.157-161)