HP Dreamcolor now working in 10 bit mode?

Discussion in 'Digital Video' started by billhinge, Mar 11, 2014.

  1. billhinge macrumors newbie

    Joined:
    Dec 27, 2013
    #1
    Hi

    I picked up a 2-3 year old Dreamcolor s/h cheap last week and very nice it is too. I'm currently running on 10.9.x and connected via mini-display port to the dreamcolor (its a mini to displayport cable).

    I've set my Monitor Override up to support RGB 4:4:4 only and I'm using SwitchResX to set the colours to = billions using SRGB colour space.

    My question is, my monitor is not yet calibrated so when I do the 10 bit ramp test in photoshop there is a very slight amount of graduation across the screen (not as much as before when reporting millions of colours. There is a very noticeable difference between the appearance under millions and billion colours. I was just wondering if the fact that my monitor is uncalibrated is affecting my viewing? I have the HP calibrator on order.

    Here it a copy of my EDID 1.4 output

    Code:
    EDID report generated by SwitchResX Version 4.3.6 (Intel - 64-bit) for display HP LP2480zx - forced RGB mode2 (EDID override)
    
    
    -----------------------------------------------------
    ------------------- RAW DATA ------------------------
    -----------------------------------------------------
          0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F
    -----------------------------------------------------
    0  | 00 FF FF FF FF FF FF 00 22 F0 F5 26 01 01 01 01
    1  | 28 15 01 04 B2 34 20 78 E6 F8 A1 B0 4C 34 B7 26
    2  | 0B 50 54 A5 08 00 81 40 81 80 A9 00 A9 40 B3 00
    3  | D1 C0 D1 00 01 01 28 3C 80 A0 70 B0 23 40 30 20
    4  | 36 00 06 44 21 00 00 1A 00 00 00 FD 00 2F 3D 18
    5  | 50 14 00 0A 20 20 20 20 20 20 00 00 00 FC 00 48
    6  | 50 20 4C 50 32 34 38 30 7A 78 0A 20 00 00 00 FF
    7  | 00 33 43 4D 31 34 30 30 30 30 59 0A 20 20 00 3D
    
    -----------------------------------------------------
     <  00FFFFFF FFFFFF00 22F0F526 01010101 28150104 B2342078 E6F8A1B0 4C34B726 0B5054A5 08008140 8180A900 A940B300 D1C0D100 0101283C 80A070B0 23403020 36000644 2100001A 000000FD 002F3D18 5014000A 20202020 20200000 00FC0048 50204C50 32343830 7A780A20 000000FF 0033434D 31343030 3030590A 2020003D	>
    
    -----------------------------------------------------
     {  0x00, 0xFF, 0xFF, 0xFF,  0xFF, 0xFF, 0xFF, 0x00,  0x22, 0xF0, 0xF5, 0x26,  0x01, 0x01, 0x01, 0x01,  0x28, 0x15, 0x01, 0x04,  0xB2, 0x34, 0x20, 0x78,  0xE6, 0xF8, 0xA1, 0xB0,  0x4C, 0x34, 0xB7, 0x26,  0x0B, 0x50, 0x54, 0xA5,  0x08, 0x00, 0x81, 0x40,  0x81, 0x80, 0xA9, 0x00,  0xA9, 0x40, 0xB3, 0x00,  0xD1, 0xC0, 0xD1, 0x00,  0x01, 0x01, 0x28, 0x3C,  0x80, 0xA0, 0x70, 0xB0,  0x23, 0x40, 0x30, 0x20,  0x36, 0x00, 0x06, 0x44,  0x21, 0x00, 0x00, 0x1A,  0x00, 0x00, 0x00, 0xFD,  0x00, 0x2F, 0x3D, 0x18,  0x50, 0x14, 0x00, 0x0A,  0x20, 0x20, 0x20, 0x20,  0x20, 0x20, 0x00, 0x00,  0x00, 0xFC, 0x00, 0x48,  0x50, 0x20, 0x4C, 0x50,  0x32, 0x34, 0x38, 0x30,  0x7A, 0x78, 0x0A, 0x20,  0x00, 0x00, 0x00, 0xFF,  0x00, 0x33, 0x43, 0x4D,  0x31, 0x34, 0x30, 0x30,  0x30, 0x30, 0x59, 0x0A,  0x20, 0x20, 0x00, 0x3D, 	}
    
    -----------------------------------------------------
    	Valid EDID block: checksum passed
    
    -----------------------------------------------------
    ------------------- MAIN EDID BLOCK -----------------
    -----------------------------------------------------
    
    EDID Version........1.4
    Manufacturer........HWP
    Product Code........62758 (F526) (26F5)
    Serial Number.......01010101
    
    Manufactured........Week 40 of year 2011
    Max H Size..........52 cm
    Max V Size..........32 cm
    Gamma...............2.20
    
    Display Supported Features:
    ---------------------------
    	Power Management: Active off	Power Management: Suspend	Power Management: Standby
    
    Display type:
    -------------
    	RGB 4:4:4 Color Encoding Format
    	Display is non continuous frequency
    	Default color space is sRGB standard
    	Preferred timing mode includes Native Pixel Format
    
    
    Input signal & sync:
    --------------------
    Digital Input
    	10 Bits per Primary Color
    	HDMI-a is supported
    
    
    Color info:
    -----------
    Red x = 0.690  Green x = 0.205  Blue x = 0.150  White x = 0.312
    Red y = 0.300  Green y = 0.715  Blue y = 0.045  White y = 0.329
    
    Established Timings:
    --------------------
    		720 x 400 @ 70Hz
    		640 x 480 @ 60Hz
    		640 x 480 @ 75Hz
    		800 x 600 @ 60Hz
    		1024 x 768 @ 60Hz
    
    Manufacturer Reserved Timings:
    ------------------------------
    
    Standard Timing Identification:
    -------------------------------
    	#0:	1280 x 960 @ 60Hz 	(8140)
    	#1:	1280 x 1024 @ 60Hz 	(8180)
    	#2:	1600 x 1000 @ 60Hz 	(A900)
    	#3:	1600 x 1200 @ 60Hz 	(A940)
    	#4:	1680 x 1050 @ 60Hz 	(B300)
    	#5:	1920 x 1080 @ 60Hz 	(D1C0)
    	#6:	1920 x 1200 @ 60Hz 	(D100)
    
    Monitor Description blocks:
    ---------------------------
    	Descriptor #0 - Timing definition:
    	Mode = 1920 x 1200 @ 59.950Hz
    		Pixel Clock............. 154.00 MHz		Non-Interlaced
    
    		                        Horizontal		Vertical
    		Active.................. 1920 pixels		1200 lines
    		Front Porch.............   48 pixels		   3 lines
    		Sync Width..............   32 pixels		   6 lines
    		Back Porch..............   80 pixels		  26 lines
    		Blanking................  160 pixels		  35 lines
    		Total................... 2080 pixels		1235 lines
    		Scan Rate...............  74.038 kHz		 59.950 Hz
    
    		Image Size..............  518 mm		 324 mm
    		Border..................    0 pixels		   0 lines
    
    			Sync: Digital separate with
    				* Negative vertical polarity
    				* Positive horizontal polarity
    
    	Descriptor #1 - Monitor limits:
    		Horizontal frequency range.......24-80 kHz
    		Vertical frequency range.........47-61 Hz
    		Maximum bandwidth unspecified
    	Range Limits Only
    
    	Descriptor #2 - Monitor name:
    			HP LP2480zx
    
    	Descriptor #3 - Serial number:
    			3CM140000Y
    
    
    Are there any other tests I can do, Final Cut Pro etc ?

    regards
    Steve
     

    Attached Files:

  2. BudMan1 macrumors newbie

    Joined:
    Mar 19, 2014
    #2
    need a little help

    Hi,

    I have the same setup as you but am having a hard time getting the display to look crisp. In fact, it is giving me a headache:) Also, I am new to Mac so I updated the driver from HP, installed SwitchResX and compared the two EDID files and don't see much of a difference. Am I missing something?

    Thanks in advance.

    --Bud
     
  3. icpmac macrumors newbie

    Joined:
    Oct 28, 2014
    #3
    I have the same monitor, same setup (miniDP to DP) and os (10.9). I've also used SwithresX to activate 10-bit. But it doesn't work. Photoshop shows you banding, no matter what you do. You're not using a 10-bit framebuffer, so it's an 8-bit framebuffer. You can check that in system profiler.

    I've also tried that EDID, same results. 10-bit framebuffer isn't activated.

    I hope this could work, but Apple dont' allow us to get 10-bit output from the internal graphic card on imac (even if the card is capable). Only from video i/o boxes and pci cards.
     
  4. poematik13 macrumors 6502a

    Joined:
    Jun 5, 2014
    #4
    OS X does not support 10 bit output from graphics cards. You have to use an external interface (something from AJA or blackmagic) to do so
     

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