Issues with External Displays on my Macbook Pro Retina

Hello -
My apologies for starting a second thread back to back, but I thought I'd keep these two issues separate
I've been using two external displays off of my Macbook Pro Retina for some time - one off of the HDMI port and the other off of a Thunderbolt to HDMI adapter.  Everything was absolutely perfect until the most recent update.  Immediately after that, whenever the macbook wakes up, the two external displays go into this black and white snowy mode (like the HBO logo, or that thing from poltergeist) and takes a minute or two to start working properly.  Any suggestions on how I can fix this?
Thanks.

Hi there,
Just browsed the forum and found a fix which solve the issue in my context: Google Chrome Play Music app was actually swallowing the media keys events, preventing iTunes to get them.
Still don't really understand why it impacts only iTunes in my case, however once the Play Music app uninstalled from Chrome via the Extensions pane of the Settings page, iTunes got its media keys events back.
See this thread for reference:
Media keys not working on MacBook Air
Cheers

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