My OS (10.9.5) was recently reinstalled and now, when restarting from sleep, I get a totally gray screen with a line of oblong dots that light up sequentially from the left to right. It takes a long time to get to my regular login page. What can I do

I am on a MacBook Pro running OS 10.9.5. I recently took it to the Genius Bar and they reinstalled the OS. Since then it has a slow wake from sleep mode with a totally gray screen. The gray screen has a small row of oblong white dots that light from left to right. Sometimes if I enter Control Command delete, it will speed up getting to the login screen. How can I get it to start quickly again with only the usual login screen? I have tried Restarting a number of times and repairing disk permissions, but nothing I have tried has worked. Any ideas, anyone? Thanks!