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Ability to dump display's EDID (from Mac)

post #1 of 3
Thread Starter 
I've dug through the web but haven't found a good solution. I'd like to dump the entire parsed HDMI 1.3 (or HDMI 1.4) edid of a display connected to a Mac.

It seems you can get access to the edid using the terminal and

ioreg -lw0 | grep "IODisplayEDID"

But I haven't found anything that parses it.

I've found "display-edid", compiled it... but it doesn't seem to support the HDMI 1.3 "video latency" optional block.

Anything out there I've missed?
post #2 of 3
Not sure what you are looking for in the EDID (256 Bytes ?) but SwitchResX 3.7.9 has the ability to export and parse the DDC which is akin to EDID.
Below is what I get for my Cinema Display 20" [EDID 1.3] :

DDC block report generated by SwitchResX for display
Apple Cinema Display

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 06 10 19 92 E3 00 FE 02
1 | 14 0E 01 03 80 2B 1B 78 2E E6 91 A3 54 4A 99 26
2 | 0F 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
3 | 01 01 01 01 01 01 C1 2D 90 A0 60 1A 0C 40 40 20
4 | 33 00 B1 0E 11 00 00 1E 00 00 00 FC 00 41 70 70
5 | 6C 65 20 43 69 6E 65 6D 61 20 00 00 00 FC 00 44
6 | 69 73 70 6C 61 79 0A 00 00 00 00 00 00 00 00 00
7 | 00 06 10 03 00 1C 00 03 00 00 00 00 00 00 01 A1

Valid DDC block: checksum passed

EDID Version........1.3
Manufacturer........APP
Product Code........6546 (1992) (9219)
Serial Number.......50200803

Manufactured........Week 20 of year 2004
Max H Size..........43 cm
Max V Size..........27 cm
Gamma...............2.20

DPMS Supported Features:
Active off

Display type:
RGB color display


Input signal & sync:
Digital

Color info:
Red x = 0.640 Green x = 0.290 Blue x = 0.150 White x = 0.312
Red y = 0.330 Green y = 0.600 Blue y = 0.060 White y = 0.329

Established Timings:

Manufacturer Reserved Timings:

Standard Timing Identification:

Monitor Description blocks:
Descriptor #0 is Timing definition:
Mode = 1680 x 1050 @ 60Hz
Pixel Clock.............117.13 MHz Non-Interlaced

Horizontal Vertical
Active..................1680 pixels 1050 lines
Front Porch............. 64 pixels 3 lines
Sync Width.............. 32 pixels 3 lines
Back Porch.............. 64 pixels 6 lines
Blanking................ 160 pixels 12 lines
Total...................1840 pixels 1062 lines
Scan Rate............... 63.66 kHz 59.94 Hz

Image Size.............. 433 mm 270 mm
Border.................. 0 pixels 0 lines

Sync: Digital separate with
* Positive vertical polarity
* Positive horizontal polarity

Descriptor #1 is Monitor name:
Apple Cinema
Descriptor #2 is Monitor name:
Display
Descriptor #3 is Unknown descriptor. ASCII interpretation follows (?)
Edited by geeji - 4/5/13 at 11:15pm
post #3 of 3
Thread Starter 
Thanks. I got in touch with Stephane (SwitchResX) and he was able to get me what I wanted.
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