- 安装 ddcutil
apt install ddcutil
- 输入命令
ddcutil detect --verbose
输出类似如下：
Output level: Verbose
Reporting DDC data errors: false
Trace groups active: none
Traced functions: none
Traced files: none
Force I2C slave address: false
User defined features: disabled
Invalid display
I2C bus: /dev/i2c-7
I2C address 0x50 (EDID) present: true
Is eDP device: true
/sys/bus/i2c/devices/i2c-7/name: DPDDC-A
EDID synopsis:
Mfg id: BOE
Model:
Serial number:
Manufacture year: 2016
EDID version: 1.4
Product code: 1795
Extra descriptor: NV156FHM-N43
Video input definition: 0x95 - Digital Input (DisplayPort)
Supported features:
Digital display type: RGB 4:4:4
Standard sRGB color space: False
White x,y: 0.312, 0.328
Red x,y: 0.652, 0.340
Green x,y: 0.316, 0.629
Blue x,y: 0.152, 0.063
Extension blocks: 0
EDID source:
EDID hex dump:
+0 +4 +8 +c 0 4 8 c
+0000 00 ff ff ff ff ff ff 00 09 e5 03 07 00 00 00 00 ................
+0010 01 1a 01 04 95 22 13 78 02 00 10 a7 57 51 a1 27 .....".x....WQ.'
+0020 10 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01 .PT.............
+0030 01 01 01 01 01 01 96 37 80 a0 70 38 3c 40 30 20 .......7..p8<@0
+0040 36 00 58 c2 10 00 00 1a 00 00 00 00 00 00 00 00 6.X.............
+0050 00 00 00 00 00 00 00 00 00 00 00 00 00 fe 00 42 ...............B
+0060 4f 45 20 43 51 0a 20 20 20 20 20 20 00 00 00 fe OE CQ. ....
+0070 00 4e 56 31 35 36 46 48 4d 2d 4e 34 33 0a 00 8d .NV156FHM-N43...
DDC communication failed
This is an eDP laptop display. Laptop displays do not support DDC/CI.