I wonder if it's a variation of this, of which I've seen many different symptoms...
Move the mouse or trackpad cursor over the center area of the login window so you can see the user icons. Click on the icon of the user that you would like to login as, type in the user's password, and press Return.
If the login window is configured to show only the name and password fields, type in the user's name and password into the fields, and press Return (even if you cannot see the rest of the login window).
This issue will not occur if the display is not sleeping when the account is logged out. Use the steps below to confirm that the account is not configured to log out automatically while the display is sleeping:
1. Open System Preferences > Security & Privacy > General. Click the padlock to unlock the preference pane and enter your admin password. Click the Advanced button at the bottom, then see if the option "Log out after N minutes of inactivity" (where N is the number of minutes) is enabled.
2. Open System Preferences > Energy Saver and configure Display Sleep to occur after the account is logged out, by dragging the slider to a number of minutes that is greater than N was set to in the previous step.
Important: If automatic log out is not needed, disable "Log out after Nminutes of inactivity" in System Preferences > Security & Privacy > General. This will also prevent the issue.
thanks for that, I appreciate the quick response- however this is not the problem! The issue is that the actual external display display does not wake up when the mini powers on. I can view the screen through ARD with no problem. I can see the desktop and the digital signage software running fine.
I was on with Apple Care for about an hour and a half and was escalated up the support chain. They say that they are not aware of this issue happening.
the workaround was to set the on timer on the screen to wake the screen up 2 minutes before the mac mini boots up. However this will not work over time as the clock on the screens will drift- once they get ten minutes out the screens will go back to sleep.
I hope apple can fix quickly!
Something to try at least as a possible temp fix, is instead
of scheduling the Minis to shut down, set them to sleep/wake
The actual issue may have to do with how the HDMI works.
If the monitors themselves are asleep, when the Mini boots,
it may be sensing no active HDMI connection and hence does not
Is it safe to assume that the connection is HDMI->HDMI? If so,
you may try a DisplayPort->HDMI adapter on one of the Minis.
This could atleast narrow it down to whether the issue is with
the Mini HDMI port, or is a generic HDMI monitor issue with Minis/OSX.
The reason for trying this is that the Display Port has a different
connection protocol than does HDMI at boot time.
Now, I am not saying you have to buy adapters for all the computers
at this point, but at least it may narrow down what the issue is.
thanks for the reply... I actually did that. I had the mac go to sleep and wake up- but that didn't work either.
I also tried mini displayport to DVI with no luck either- I didn't have a chance to do get a mini displayport to HDMI- I had to go with the screen timer method to get it sorted out.