Hi,
My name is Max and i have an Asus Z87-A with a Core i5 4670k using the intel HD graphics 4600.
One of my two display is a Sony Playstation 3D display ( PlayStation® 3D Display with SimulView™ Technology | PS3™ Accessories -PlayStation® ) connected via HDMI and i am having the same issue. I do have to mention that there's no specific drivers for this one since Sony never really bothered to develop a driver for it. So the driver shows as Generic PnP Monitor in device manager. If i go in the information center of the Intel HD Graphics Control Panel, the 3 Power management support options are showing as unsupported.
If anyone has a fix on how to correct this problem, it would be very appreciated. I find it a bit unpleasant to have to remember to shut down the screen when i'm not using the computer. Having the backlight turned on can't be good on the long run.
Also, as my paste below will show, my Benq GW2450 (DVI) with Benq drivers installed, which is an actual computer screen, doesn't support all of the power management options. However, this isn't really an issue since it's properly going to standby when sleeping.
Any help would be greatly appreciated!
Thanks 
Intel(R) HD Graphics 4600
Report Date: 9/16/2013
Report Time[hh:mm:ss]: 11:10:38
Driver Version: 10.18.10.3262
Operating System: Microsoft Windows 8 Pro with Media Center(6.2.9200)
Default Language: French (Canada)
Installed DirectX* Version: 11.1
Supported DirectX* Version: 11.1
Shader Version: 5.0
OpenGL* Version: 4.2
Physical Memory: 16063 MB
Processor: Intel(R) Core(TM) i5-4670K CPU @ 3.40GHz
Processor Speed: 3406 MHz
Vendor ID: 8086
Device ID: 0412
Device Revision: 06
* Processor Graphics Information *
Processor Graphics in Use: Intel(R) HD Graphics 4600
Video BIOS: 2170.0
Current Graphics Mode: 1920 by 1080
* Devices Connected to the Graphics Accelerator *
Active Digital Displays: 1
Active Digital Televisions: 1
* Digital Display *
Monitor Name: BenQ GW2450
Display Type: Digital
Connector Type: HDMI
Serial Number: BNQ78BF
Gamma: 2.2
DDC2 Protocol: Supported
Device Type: Digital Display
Maximum Image Size:
Horizontal: 20.87 inches
Vertical: 11.81 inches
Monitor Supported Modes:
640 by 480 (60 Hz)
640 by 480 (75 Hz)
720 by 400 (70 Hz)
800 by 600 (75 Hz)
800 by 600 (60 Hz)
832 by 624 (75 Hz)
1024 by 576 (60 Hz)
1024 by 768 (75 Hz)
1024 by 768 (60 Hz)
1152 by 870 (75 Hz)
1280 by 960 (60 Hz)
1280 by 1024 (60 Hz)
1280 by 720 (60 Hz)
1280 by 1024 (75 Hz)
1280 by 800 (60 Hz)
1600 by 900 (60 Hz)
1680 by 1050 (60 Hz)
1920 by 1080 (60 Hz)
Display Power Management Support:
Standby Mode: Not Supported
Suspend Mode: Not Supported
Active Off Mode: Supported
Raw EDID:
00 FF FF FF FF FF FF 00 09 D1 BF 78 45 54 00 00
07 17 01 03 80 35 1E 78 2E 6B 35 A4 55 55 9F 27
0C 50 54 A5 6B 80 61 C0 81 00 81 C0 81 40 81 80
A9 C0 B3 00 D1 C0 02 3A 80 18 71 38 2D 40 58 2C
45 00 13 2A 21 00 00 1E 00 00 00 FF 00 38 32 44
30 30 33 37 31 53 4C 30 0A 20 00 00 00 FD 00 32
4C 1E 53 11 00 0A 20 20 20 20 20 20 00 00 00 FC
00 42 65 6E 51 20 47 57 32 34 35 30 0A 20 00 CF
* Digital Television *
Monitor Name: Generic Monitor
Display Type: Digital
Connector Type: HDMI
Serial Number: SCE0301
Gamma: 2.2
DDC2 Protocol: Supported
Device Type: Digital Television
Maximum Image Size:
Horizontal: 20.47 inches
Vertical: 11.81 inches
Monitor Supported Modes:
640 by 480 (60 Hz)
800 by 600 (60 Hz)
1024 by 768 (60 Hz)
1280 by 720 (60 Hz)
1280 by 1024 (60 Hz)
1920 by 1080 (60 Hz)
Display Power Management Support:
Standby Mode: Not Supported
Suspend Mode: Not Supported
Active Off Mode: Not Supported
Raw EDID:
00 FF FF FF FF FF FF 00 4C 65 01 03 3A 5A 0F 00
21 15 01 03 80 34 1E 78 0A EE 95 A3 54 4C 99 26
0F 50 54 21 08 00 81 80 01 01 01 01 01 01 01 01
01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
45 00 0A 26 21 00 00 1E 01 1D 00 72 51 D0 1E 20
6E 28 55 00 0A 26 21 00 00 1E 00 00 00 FD 00 3A
3E 1E 50 11 00 0A 20 20 20 20 20 20 00 00 00 FC
00 53 43 45 49 20 4D 4F 4E 49 54 4F 52 0A 01 14
02 03 3B F0 50 10 1F 05 14 04 13 03 02 12 11 07
06 16 15 20 01 23 09 07 05 83 01 00 00 7A 03 0C
00 10 00 00 21 E8 15 15 15 15 90 0C 28 10 38 10
48 10 58 10 E8 10 06 16 E2 00 6A 01 1D 80 18 71
1C 16 20 58 2C 25 00 0A 26 21 00 00 9E 01 1D 80
D0 72 1C 16 20 10 2C 25 80 0A 26 21 00 00 9E 02
3A 80 D0 72 38 2D 40 10 2C 45 80 0A 26 21 00 00
1E 00 00 00 00 00 00 00 00 00 00 00 00 00 00 8C
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