Windowserver: received connect display change for...

I have exactly the same issue. Initially found horizontal lines flickering on the screen with the screen blinking and slighly shaking. Checked Console: same messages. Appears to be some issue withh graphics cart or video adapter drivers.

Does anyone experienced smth similar?

Same problem here. I hope it's not a motherboard problem...

There's no such issue when I turn on discrete video adapter via GFX. Problem with the integrated video card?

I just started seeing the same issue. PRAM and SMC reset didn't help. But, it does go away if I uncheck "Automatic Graphics Switching" so it stays on the high performance vs. integrated graphics. Given that I have one of the MBP models where some do develop motherboard based graphics problems, I hope this isn't the start of it. That issue is with the discrete graphics and: "The GPU issue might present itself onscreen as visual artifacts, banding or a blank screen."

I had the similar error message: WindowServer[94]: Received display connect changed for display 0x4280642

It started after I improperly disconnected an external display (a projector, actually).

The error message above was preceded by this line: Sandbox: com.apple.WebKit(602) deny file-read-data /Library/Preferences/com.apple.security-common.plist

From this I surmised that when I disconnected the projector, I had corrupted the file /Library/Preferences/com.apple.security-common.plist

Deleting that file and restarting solved the problem.

Solved my problem with display glitches associated with this:

WindowServer[95]: MPAccessSurfaceForDisplayDevice: Set up page flip mode on display 0x04272902 device: 0x7f95b3b019f0 isBackBuffered: 1 numComp: 3 numDisp: 3

Turns out it was a corrupted Eye-Fi Helper. Quitting the helper stopped the problems. Deleting the app, library folder, and fi.eye.* in user preferences and then re-installing a fresh version solved the problem.

Diagnosed by not finding the issue when logging in as guest. Console wouldn't show errors, but playing a video in mplayerx showed no glitching. Safe Boot wasn't helpful as I couldn't get it to turn off discrete graphics.