Whenever I first get into Krita it allows me to do anything like normal, but if I have a canvas and try to do anything it just won't do anything. I think it might be lag from something but I can't really tell as I can't get it to do anything besides closing the canvas, exiting out, or hitting a couple tool and what not.
This sounds like it's this problem:
So, enable Angle in the settings dialog's display page. The next version of Krita will have that enabled by default because Intel's opengl drivers are getting worse all the time...
*** This bug has been marked as a duplicate of bug 360601 ***