Good morning, everyone,

A recurring problem that doesn't seem to have a solution for Apple.

I own a MacBookPro, here are the details: The MacBook Pro (Retina, 15 inches, mid-2014) 2.5 GHz Intel Core i7 processor Memory 16GB 1600 MHz DDR3 NVIDIA GeForce GT 750M 2GB graphics + Intel Iris Pro 1536MB MacOS Mojave (version 10.14.5)

I use two screens in external connection: - 1 mini Display Port : DELL P4317Q Monitor - 1 HDMI: DELL P2717H Monitor

The problem: To set the context, I laptop is permanently connected to the two external screens. In the evening I proceed in 3 steps: - I have "suspend activities" on the Mac - I close the MacBook Pro - I disconnect the MagSafe charger (These steps can be performed in a random order)

In the morning, when turning on again, in an extremely random way, the MacBook Pro's internal display (and only it) may not be "on". In reality, it is turned on in brightness, and my mouse moves inside. No menus, no windows. If I go through "Monitor" of the settings, I see the 3 screens but I can't return the display, whatever the options chosen.

Here are some steps that work: - Disconnection of the two external screens. Everything returns to the internal screen, and as soon as you plug it back in, it's a problem again. - OS own shutdown, reboot works every time.

Do you have any idea how to solve this problem? Knowing that it doesn't come from the hardware because the screen turns on, and works on rebooting. It looks like a problem like you could find with X11 on Linux.

This problem has been coming since macOS 10.11, upgrades have not changed anything, and a factory restoration seems to see the same problems appear over time. It is therefore obviously a software problem (recurrent according to topics), but not re-solvable by Apple.

Thank you.

  • Sounds very similar to an issue I have (actually with the exact same model laptop) using airplay to make my ATV a 2nd screen. As you mentioned, the only way I've found to restore the screen's functionality is by rebooting the laptop. I can't remember but it seemed to consistently happen to either the primary or secondary monitor, so changing the monitor precedence would alter which screen would only show the background and no windows. I'm running 10.10.5 – Scottmeup Jun 6 at 10:31
  • Thank you for the answer. Unfortunately, this only displaces the problem, I use 3 monitors for professional reasons and I can't have one screen less. A colleague with a P4317Q monitor also has the same problem, which he also had with another 27-inch monitor. Very surprising as a concern... – Sigri44 Jun 6 at 12:26

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