Goes to grey screen but does not turn off

I have had two problems since upgrading my Mac Pro to Mavricks.
1) When I shut down from the finder menu it quickly closes all my applications and goes to a blank grey screen but then never actually turns completely off unless I press and hold the power button.
2) Everytime I turn the computer on the Welcome to Mail introductory dialog box opens up and not until I press the Continue button does the Mail application actually open, despite the Mail application having been open when I last shut down.
I have also noticed occastional "flickers" of windows when shutting down, in short it does not seem happy with either the shutdown or the booting up process, although I must admit that in so far as it does shut down, (i. e. the time it takes for the applications to quit), it does so faster than it used to under the older OS.
Are these bugs that Apple is aware of and will soon offer a fix for?

Hi supjohn,
Thanks for your reply. Many of the same things that cause a computer to fail to shut down can cause a computer to fail to go to sleep, so the troubleshooting is still pertinent to your issue. If the steps described in the article don't resolve the issue for you, then it sounds like a different direction may be warranted here. Due to the nature of your issue you may find more information by using another one of Apple's support resources:
http://www.apple.com/support/contact/
Take care,
- Ari

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Try a reboot by holding both the power and home buttons until the apple logo appears, ignore the red slider if that appears. See if that clears the glitch.

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Try reset iPad
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Hi @suzygf78,
Welcome to the HP Support Forums!
I understand that your display is still after your computer is shutdown?! I am happy to help you with this. It would be best to get the full product number and OS version. Please read the following documents if you need help in finding those.
How Do I Find My Model Number or Product Number?
Is the Windows Version on My Computer 32-bit or 64-bit?
Is the display you are describing the built in display or an attached 2nd display?
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Resolving Problems with Notebook Displays (Windows 7 and Windows 8)
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Regards,
Malygris1
I work on behalf of HP
Please click Accept as Solution if you feel my post solved your issue, it will help others find the solution.
Click Kudos Thumbs Up on the right to say “Thanks” for helping!

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What I found, especially with my Boxwave case (that iLounge didn't give high marks for), was that if you hold the earhole up directly to your ear, the screen does turn off.
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Option 1
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Goes to grey screen but does not turn off

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