External monitor doesn't turn off with sleep

[mageus]

I have an external monitor connected to a 2012 15" cMBP via a DP->DVI adapter. When I put the Mac to sleep, the external monitor stays on. The monitor goes to sleep correctly when connected to any other computer.

Any ideas?

 

[phyrexia]

tried resetting PRAM?

 

[Auzburner]

My 2010 17" MBP did the same thing over mDP to HDMI.
My rMBP does the same thing as well from HDMI out.

Connected to a Samsung display.

When connected to my PowerMac G5 over DVI = No issues when sleeping.

Not sure what causes this, but I'm guessing it has a lot to do with the connection type?

 

[lightrack]

Hello,

I meet the same problem with MBP 15" 2012. The problem occurs with Samsung 27" SA850 (connected with mDP-DP) and Nec 19" 19070NX (connected with Apple mDP-DVI adapter).

Some weeks ago everything was fine.

It seems the problem is with MBP.

Any ideas?

 

[lightrack]

Hello,

I meet the same problem with MBP 15" 2012. The problem occurs with Samsung 27" SA850 (connected with mDP-DP) and Nec 19" 19070NX (connected with Apple mDP-DVI adapter).

Some weeks ago everything was fine.

It seems the problem is with MBP.

Any ideas?

It seems it was a software problem. I unplugged MagSafe from MBP and external monitor for some minutes and it is fine now 🙂