ddcutil detect
The following example shows output of ddcutil detect --verbose on a system with 3 monitors attached.
Display 1
I2C bus: /dev/i2c-5
DRM connector: card0-HDMI-A-1
Driver: amdgpu
I2C address 0x50 (EDID) responsive: true
Is eDP device: false
Is LVDS device: false
/sys/bus/i2c/devices/i2c-5/name AMDGPU DM i2c hw bus 3
PCI device path: /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/i2c-5
EDID synopsis:
Mfg id: SAM - Samsung Electric Company
Model: U32H75x
Product code: 3586 (0x0e02)
Serial number: HTOJ900304
Binary serial number: 810634571 (0x30514d4b)
Manufacture year: 2017, Week: 37
EDID version: 1.3
Extra descriptor:
Video input definition: 0x80 - Digital Input
Supported features:
DPMS active-off
Digital display type: RGB 4:4:4 + YCrCb 4:4:4
Standard sRGB color space: False
White x,y: 0.312, 0.329
Red x,y: 0.634, 0.341
Green x,y: 0.312, 0.636
Blue x,y: 0.158, 0.062
Extension blocks: 1
EDID source: I2C
EDID hex dump:
+0 +4 +8 +c 0 4 8 c
+0000 00 ff ff ff ff ff ff 00 4c 2d 02 0e 4b 4d 51 30 ........L-..KMQ0
+0010 25 1b 01 03 80 46 27 78 2a 5f b1 a2 57 4f a2 28 %....F'x*_..WO.(
+0020 0f 50 54 bf ef 80 71 4f 81 00 81 c0 81 80 95 00 .PT...qO........
+0030 a9 c0 b3 00 01 01 04 74 00 30 f2 70 5a 80 b0 58 .......t.0.pZ..X
+0040 8a 00 b9 88 21 00 00 1e 00 00 00 fd 00 18 4b 1e ....!.........K.
+0050 5a 1e 00 0a 20 20 20 20 20 20 00 00 00 fc 00 55 Z... .....U
+0060 33 32 48 37 35 78 0a 20 20 20 20 20 00 00 00 ff 32H75x. ....
+0070 00 48 54 4f 4a 39 30 30 33 30 34 0a 20 20 01 67 .HTOJ900304. .g
VCP version: 2.2
Controller mfg: Mstar
Firmware version: 0.1
Monitor returns DDC Null Response for unsupported features: false
Display 2
I2C bus: /dev/i2c-6
DRM connector: card0-DVI-D-1
Driver: amdgpu
I2C address 0x50 (EDID) responsive: true
Is eDP device: false
Is LVDS device: false
/sys/bus/i2c/devices/i2c-6/name AMDGPU DM i2c hw bus 4
PCI device path: /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/i2c-6
EDID synopsis:
Mfg id: NEC - NEC Corporation
Model: P241W
Product code: 26715 (0x685b)
Serial number: 28107362UW
Binary serial number: 16843009 (0x01010101)
Manufacture year: 2012, Week: 33
EDID version: 1.3
Extra descriptor:
Video input definition: 0x80 - Digital Input
Supported features:
DPMS standby
DPMS suspend
DPMS active-off
Digital display type: RGB 4:4:4 + YCrCb 4:4:4
Standard sRGB color space: False
White x,y: 0.313, 0.329
Red x,y: 0.636, 0.335
Green x,y: 0.297, 0.622
Blue x,y: 0.147, 0.074
Extension blocks: 0
EDID source: I2C
EDID hex dump:
+0 +4 +8 +c 0 4 8 c
+0000 00 ff ff ff ff ff ff 00 38 a3 5b 68 01 01 01 01 ........8.[h....
+0010 21 16 01 03 80 34 20 78 ea f1 c5 a2 55 4c 9f 25 !....4 x....UL.%
+0020 13 50 54 bf ef 80 81 c0 81 80 90 40 8b c0 95 00 .PT........@....
+0030 a9 40 b3 00 d1 00 28 3c 80 a0 70 b0 23 40 30 20 .@....(<..p.#@0
+0040 36 00 06 44 21 00 00 1a 00 00 00 fd 00 32 55 1f 6..D!........2U.
+0050 5c 11 00 0a 20 20 20 20 20 20 00 00 00 fc 00 50 \... .....P
+0060 32 34 31 57 0a 20 20 20 20 20 20 20 00 00 00 ff 241W. ....
+0070 00 32 38 31 30 37 33 36 32 55 57 0a 20 20 00 50 .28107362UW. .P
VCP version: 2.0
Controller mfg: Unspecified
Extended delay as recovery from DDC Null Response...
Firmware version: Unspecified
Monitor returns DDC Null Response for unsupported features: false
Display 3
I2C bus: /dev/i2c-7
DRM connector: card0-DP-1
Driver: amdgpu
I2C address 0x50 (EDID) responsive: true
Is eDP device: false
Is LVDS device: false
/sys/bus/i2c/devices/i2c-7/name AMDGPU DM aux hw bus 0
PCI device path: /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/card0/card0-DP-1/i2c-7
EDID synopsis:
Mfg id: DEL - Dell Inc.
Model: DELL U3011
Product code: 16485 (0x4065)
Serial number: PH5NY2CIANXL
Binary serial number: 1095653452 (0x414e584c)
Manufacture year: 2012, Week: 51
EDID version: 1.4
Extra descriptor:
Video input definition: 0xb5 - Digital Input (DisplayPort), Bit depth: 10
Supported features:
DPMS active-off
Digital display type: RGB 4:4:4 + YCrCb 4:4:4 + YCrCb 4:2:2
Standard sRGB color space: True
White x,y: 0.313, 0.329
Red x,y: 0.678, 0.309
Green x,y: 0.210, 0.692
Blue x,y: 0.146, 0.055
Extension blocks: 1
EDID source: I2C
EDID hex dump:
+0 +4 +8 +c 0 4 8 c
+0000 00 ff ff ff ff ff ff 00 10 ac 65 40 4c 58 4e 41 ..........e@LXNA
+0010 33 16 01 04 b5 40 28 78 3a 8d 85 ad 4f 35 b1 25 3....@(x:...O5.%
+0020 0e 50 54 a5 4b 00 71 4f 81 00 81 80 a9 40 d1 00 .PT.K.qO.....@..
+0030 d1 40 01 01 01 01 e2 68 00 a0 a0 40 2e 60 30 20 .@.....h...@.`0
+0040 36 00 81 91 21 00 00 1a 00 00 00 ff 00 50 48 35 6...!........PH5
+0050 4e 59 32 43 49 41 4e 58 4c 0a 00 00 00 fc 00 44 NY2CIANXL......D
+0060 45 4c 4c 20 55 33 30 31 31 0a 20 20 00 00 00 fd ELL U3011. ....
+0070 00 31 56 1d 71 1c 00 0a 20 20 20 20 20 20 01 56 .1V.q... .V
VCP version: 2.1
Extended delay as recovery from DDC Null Response...
Controller mfg: Mstar
Firmware version: 1.5
Monitor returns DDC Null Response for unsupported features: false