Dell Monitor (P2411H) Won't Enter Power Save Mode

[echozoom]

I have just purchased a Dell P2411H monitor for use with my 13 inch MacBook Pro. The display has generally worked well so far. However, there is one problem. The monitor is unable to enter "Power Save Mode" unless the computer is manually put to sleep. My display is currently set to sleep automatically after 15 minutes but once this happens, the monitor indicates that it is "Entering Power Save Mode" then turns back on, then says it is "Entering Power Save Mode" before turning back on again. This cycle continues repeatedly until I interrupt it.

I am not sure if I have explained the problem well. However, I have found a youtube video of someone demonstrating the issue: http://www.youtube.com/watch?v=48EFXz6xIEU

One thing that I did notice is that in the system profiler, it says that there is no display connected before outlining the specs of the monitor but I'm not sure if this is normal or not:

Displays:
Display Connector:
Status: No Display Connected
DELL P2411H:
Resolution: 1920 x 1080 @ 60 Hz
Pixel Depth: 32-Bit Color (ARGB8888)
Main Display: Yes
Mirror: Off
Online: Yes
Rotation: Supported



I think the problem is caused when the display goes to sleep before the computer does. Is there any way to put the computer to sleep just before the display goes to sleep? Any suggestions as to how to solve this problem would be much appreciated as this display is perfect for my needs otherwise!

Thanks!

 

[echozoom]

I think I have isolated the issue to the DVI to Mini DisplayPort Adapter. I have the same model of monitor connected to an older MacBook Pro with DVI port (so no adapter is required) and the display enters power save mode correctly.

I'm still at a loss as to resolve the problem however, because I need the adapter to connect the display to my machine. Any suggestions?

 

[Maarked]

I have the same issue with my iMac to Dell P2411H. I have found no solution to the problem and wish I had returned my Dell before 30 days.

I have tried other DVI to Mini-DV cables with no luck.

Hope someone has a fix for this!

 

[echozoom]

I have the same issue with my iMac to Dell P2411H. I have found no solution to the problem and wish I had returned my Dell before 30 days.

I have tried other DVI to Mini-DV cables with no luck.

Hope someone has a fix for this!

Thanks for that info. I actually tried my computer with two other P2411H monitors and it entered Power Save Mode fine so maybe only some of these displays have this issue. I'm trying to get a replacement sent so I'll see if that solves the problem I guess.

 

[Maarked]

Did a new display fix the problem?

 

[echozoom]

Did a new display fix the problem?

I ended up returning the one that didn't work with my machine and using the other one we had purchased (same model). The sleep problem only seems to impact some Dell P2411H monitors as the second one works perfectly. So I guess the answer is yes in my case.

 

[Maarked]

Apparently this only happens on the DVI adapter, I broke down and bought a VGA to MiniDV adapter from Apple and what do you know, problem fixed.

 

[lozzd]

This has been annoying me for weeks. My old Macbook Pro (Late 2010) died and so it got swapped with a new one (2011 model with Thunderbolt) and ever since it exhibits this incredibly annoying behaviour.

Is there any solution to this other than "get a new monitor" or use VGA? Do Dell swap these under warranty for this issue?