MacBook Pro and 27" Display not playing nice together

I'm having a rather strange problem with my Early 2011 MacBook Pro and my 27" Apple Display (Mini-Display port). They don't want to play nice together. The display will randomly/intermittently disconnect and turn black, then reconnect, sometimes after a second or so, but sometimes not for a good 10 seconds or more.
- My MBP works fine on other monitors (Thunderbolt 27", 24" LG via DVI adaptor).
- My wife's MBP works fine on this monitor.
- Had a tech look at the monitor, his MacBook works on it fine too.
- The combination of my MBP and this 27" Apple Display gives you the result shown in the video.
It happens quite frequently -- often enough to make working on this combination unbearable. But I have no clue as to what's going on here.
In "System Information" under "Graphics / Displays", the display not show up as connected to either the PCIe or Built-In graphics adapter when the 27" has turned black. When the screen is on, it shows up.
Here's a YouTube video of the symptoms.
http://www.youtube.com/watch?v=z0C50k0189I
I'm stumped. Does anyone have any ideas?

Your video shows the MacBook Pro display turning blue for a few seconds, several different times. This is an acknowledgement that a display is coming (or going).
Unencumbered by anything sensible, my diagnosis would be that you have a loose connection.
Mini DisplayPort cables can be diabolical. When inserting, you must make certain that essentially ALL of the metal end disappears inside the computer jack.

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12/28/14 10:31:13.240 AM
imagent[617]
[Warning] certForURI: IDSAccount: 0x7fc680e14f40 [Service: com.apple.madrid User: xxxxxx ID: E583D98B-B71D-43E3-9377-F25AAE4CCFC3 Type: Apple ID Active: YES Registration Status: Registered] - No cert found, not in registered URI set
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imagent[617]
[Warning] certForURI: IDSAccount: 0x7fc680e14f40 [Service: com.apple.madrid User: xxxxxx ID: E583D98B-B71D-43E3-9377-F25AAE4CCFC3 Type: Apple ID Active: YES Registration Status: Registered] - No cert found, not in registered URI set
12/28/14 10:31:13.261 AM
imagent[617]
[Warning] callerURI - No bindings !!
12/28/14 10:31:13.261 AM
imagent[617]
[Warning] callerURI - No bindings !!
12/28/14 10:31:13.262 AM
imagent[617]
[Warning] Request to send message: IMMessageItem[outgoing: YES sender=e:xxxxxx; service=iMessage; handle=+1pppppp ; unformatted=(null); country=(null); roomName='(null)'; flags=c; subject='<< Message Not Loggable >>' text='<< Message Not Loggable >>' messageID: 0 GUID:'41EF304E-50D5-4D68-9D3C-665EEB431329' date:'441484273.218647' date-delivered:'0.000000' date-read:'0.000000' date-played:'0.000000' transfer guids: '(null)' empty: YES finished: NO sent: NO read: NO delivered: NO audio: NO played: NO from-me: YES DD results: NO DD Scanned: NO Downgraded: NO emote: NO expirable: NO expire-state: 0 error: 0] to chat: IMDChat: 0x7fc680d3b190 GUID: iMessage;-;+1pppppp
Style: - State: 3 Participants: (
    "[IMDHandle: <+1pppppp:(null):US>]"
) Room Name: (null) Display Name: (null) Identifier: +1pppppp Unread count: 0 Row ID: 2 Group ID: 8A1D6346-0B77-4800-A4C8-B85CCB972B69 from NIL ID fromAccount: IDSAccount: 0x7fc680e14f40 [Service: com.apple.madrid User: xxxxxx ID: E583D98B-B71D-43E3-9377-F25AAE4CCFC3 Type: Apple ID Active: YES Registration Status: Registered]
12/28/14 10:31:13.262 AM
imagent[617]
[Warning] Request to send message: IMMessageItem[outgoing: YES sender=e:xxxxxx; service=iMessage; handle=+1pppppp; unformatted=(null); country=(null); roomName='(null)'; flags=c; subject='<< Message Not Loggable >>' text='<< Message Not Loggable >>' messageID: 0 GUID:'41EF304E-50D5-4D68-9D3C-665EEB431329' date:'441484273.218647' date-delivered:'0.000000' date-read:'0.000000' date-played:'0.000000' transfer guids: '(null)' empty: YES finished: NO sent: NO read: NO delivered: NO audio: NO played: NO from-me: YES DD results: NO DD Scanned: NO Downgraded: NO emote: NO expirable: NO expire-state: 0 error: 0] to chat: IMDChat: 0x7fc680d3b190 GUID: iMessage;-;+1pppppp Style: - State: 3 Participants: (
    "[IMDHandle: <+1pppppp:(null):US>]"
) Room Name: (null) Display Name: (null) Identifier: +1pppppp Unread count: 0 Row ID: 2 Group ID: 8A1D6346-0B77-4800-A4C8-B85CCB972B69 from NIL ID fromAccount: IDSAccount: 0x7fc680e14f40 [Service: com.apple.madrid User: xxxxxx ID: E583D98B-B71D-43E3-9377-F25AAE4CCFC3 Type: Apple ID Active: YES Registration Status: Registered]
12/28/14 10:31:13.262 AM
imagent[617]
[Warning] Group message controler failed to prepare chat: IMDChat: 0x7fc680d3b190 GUID: iMessage;-;+1pppppp Style: - State: 3 Participants: (
    "[IMDHandle: <+1pppppp:(null):US>]"
) Room Name: (null) Display Name: (null) Identifier: +1pppppp Unread count: 0 Row ID: 2 Group ID: 8A1D6346-0B77-4800-A4C8-B85CCB972B69 error: 4
12/28/14 10:31:13.263 AM
imagent[617]
[Warning] Group message controler failed to prepare chat: IMDChat: 0x7fc680d3b190 GUID: iMessage;-;+1pppppp Style: - State: 3 Participants: (
    "[IMDHandle: <+1pppppp:(null):US>]"
) Room Name: (null) Display Name: (null) Identifier: +1pppppp Unread count: 0 Row ID: 2 Group ID: 8A1D6346-0B77-4800-A4C8-B85CCB972B69 error: 4
12/28/14 10:31:20.390 AM
imagent[617]
[Warning] certForURI: IDSAccount: 0x7fc680e14f40 [Service: com.apple.madrid User: xxxxxx ID: E583D98B-B71D-43E3-9377-F25AAE4CCFC3 Type: Apple ID Active: YES Registration Status: Registered] - No cert found, not in registered URI set
12/28/14 10:31:20.391 AM
imagent[617]
[Warning] certForURI: IDSAccount: 0x7fc680e14f40 [Service: com.apple.madrid User: xxxxxx ID: E583D98B-B71D-43E3-9377-F25AAE4CCFC3 Type: Apple ID Active: YES Registration Status: Registered] - No cert found, not in registered URI set
12/28/14 10:31:20.414 AM
imagent[617]
[Warning] callerURI - No bindings !!
12/28/14 10:31:20.414 AM
imagent[617]
[Warning] callerURI - No bindings !!
12/28/14 10:31:20.481 AM
imagent[617]
[Warning] Request to send message: IMMessageItem[outgoing: YES sender=(null); service=iMessage; handle=+1pppppp; unformatted=(null); country=(null); roomName='(null)'; flags=100005; subject='<< Message Not Loggable >>' text='<< Message Not Loggable >>' messageID: 1948 GUID:'41EF304E-50D5-4D68-9D3C-665EEB431329' date:'441484280.000000' date-delivered:'0.000000' date-read:'0.000000' date-played:'0.000000' transfer guids: '(null)' empty: NO finished: YES sent: NO read: NO delivered: NO audio: NO played: NO from-me: YES DD results: NO DD Scanned: YES Downgraded: NO emote: NO expirable: NO expire-state: 0 error: 0] to chat: IMDChat: 0x7fc680d3b190 GUID: iMessage;-;+1pppppp Style: - State: 3 Participants: (
    "[IMDHandle: <+1pppppp:(null):US>]"
) Room Name: (null) Display Name: (null) Identifier: +1pppppp Unread count: 0 Row ID: 2 Group ID: 8A1D6346-0B77-4800-A4C8-B85CCB972B69 from NIL ID fromAccount: IDSAccount: 0x7fc680e14f40 [Service: com.apple.madrid User: xxxxxx ID: E583D98B-B71D-43E3-9377-F25AAE4CCFC3 Type: Apple ID Active: YES Registration Status: Registered]
12/28/14 10:31:20.481 AM
imagent[617]
[Warning] Request to send message: IMMessageItem[outgoing: YES sender=(null); service=iMessage; handle=+1pppppp; unformatted=(null); country=(null); roomName='(null)'; flags=100005; subject='<< Message Not Loggable >>' text='<< Message Not Loggable >>' messageID: 1948 GUID:'41EF304E-50D5-4D68-9D3C-665EEB431329' date:'441484280.000000' date-delivered:'0.000000' date-read:'0.000000' date-played:'0.000000' transfer guids: '(null)' empty: NO finished: YES sent: NO read: NO delivered: NO audio: NO played: NO from-me: YES DD results: NO DD Scanned: YES Downgraded: NO emote: NO expirable: NO expire-state: 0 error: 0] to chat: IMDChat: 0x7fc680d3b190 GUID: iMessage;-;+1pppppp Style: - State: 3 Participants: (
    "[IMDHandle: <+1pppppp:(null):US>]"
) Room Name: (null) Display Name: (null) Identifier: +1pppppp Unread count: 0 Row ID: 2 Group ID: 8A1D6346-0B77-4800-A4C8-B85CCB972B69 from NIL ID fromAccount: IDSAccount: 0x7fc680e14f40 [Service: com.apple.madrid User: xxxxxx ID: E583D98B-B71D-43E3-9377-F25AAE4CCFC3 Type: Apple ID Active: YES Registration Status: Registered]
12/28/14 10:31:20.482 AM
imagent[617]
[Warning] Group message controler failed to prepare chat: IMDChat: 0x7fc680d3b190 GUID: iMessage;-;+1pppppp Style: - State: 3 Participants: (
    "[IMDHandle: <+1pppppp:(null):US>]"
) Room Name: (null) Display Name: (null) Identifier: +1pppppp Unread count: 0 Row ID: 2 Group ID: 8A1D6346-0B77-4800-A4C8-B85CCB972B69 error: 4
12/28/14 10:31:20.482 AM
imagent[617]
[Warning] Group message controler failed to prepare chat: IMDChat: 0x7fc680d3b190 GUID: iMessage;-;+1pppppp Style: - State: 3 Participants: (
    "[IMDHandle: <+1pppppp:(null):US>]"
) Room Name: (null) Display Name: (null) Identifier: +1pppppp Unread count: 0 Row ID: 2 Group ID: 8A1D6346-0B77-4800-A4C8-B85CCB972B69 error: 4
12/28/14 10:31:20.806 AM
com.apple.iCloudHelper[1018]
objc[1018]: Class FALogging is implemented in both /System/Library/PrivateFrameworks/FamilyCircle.framework/Versions/A/FamilyCircl e and /System/Library/PrivateFrameworks/FamilyNotification.framework/Versions/A/Famil yNotification. One of the two will be used. Which one is undefined.
12/28/14 10:31:20.813 AM
com.apple.xpc.launchd[1]
(com.apple.imfoundation.IMRemoteURLConnectionAgent) The _DirtyJetsamMemoryLimit key is not available on this platform.
I look forward to any advice anyone can provide. Thanks.

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