Intellij IDEA doesn't detect file changes, therefore doesn't make before running

I'm having the following class:

public class MyClass {  public static void main(String[] args) {    System.out.println("abc");  }}

When I'm running the main method, "abc" is printed, as expected.

Then, after modifying "abc" with "def", I got "abc" printed instead of "def". I tried to manually trigger the Make button, but I got the same wrong result. Also, in the Event Log tab, the "All files are up-to-date" message is logged each time I try to run the method, even though I changed what to print.

If I right-click the file and choose "Compile MyClass.java", all works as expected.

I'm having this problem on my workstation (xubuntu 14.04), after I changed my hard drive to an SSD (if it matters). Other collegues with and without SSD don't have this problem, that's why I'm thinking it may be a wrong IDEA configuration.