Jenkins Cannot run program "Xvfb": java.io.IOException :no such file or directory
After you install the Xvfb Plugin, you have to do: Manage Jenkins -> Configure System and find the Xvfb Installation section and add an installation with a Name and Directory in which to find Xvfb executable (which can be blank if it can be found in the PATH). Without this setting, Xvfb doesn't work.
So, why not search the PATH by default? Why should this be needed??