Windows 10, Dell Optiplex 390.

About 1/3 of the time when my computer wakes up after sleep, the display goes into fat ugly mode (VGA mode) and the AMD Radeon HD 6450 driver is no longer in charge. I have to then go into Device Manager/Display adapters and reload the AMD driver. (15.31.1901.0). Is this simply because the driver is old and nasty? (2/26/2016 and nothing newer.) Not the end of the world. Reloading the driver works, but it's a pita to do a few times/day. -Thank you