What is “Television” in System Information report for an external monitor (that is not actually a TV)?
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07-04-2021 - |
Question
The System Information report for Graphics/Displays on my MacBook Pro Retina (Late 2013) shows the following info for the internal screen and for an external Acer monitor.
NVIDIA GeForce GT 750M:
Chipset Model: NVIDIA GeForce GT 750M
Type: GPU
Bus: PCIe
PCIe Lane Width: x8
VRAM (Total): 2048 MB
Vendor: NVIDIA (0x10de)
Device ID: 0x0fe9
Revision ID: 0x00a2
ROM Revision: 3776
gMux Version: 4.0.8 [3.2.8]
Displays:
Color LCD:
Display Type: Retina LCD
Resolution: 2880 x 1800 Retina
Retina: Yes
Pixel Depth: 32-Bit Color (ARGB8888)
Main Display: Yes
Mirror: Off
Online: Yes
Built-In: Yes
Acer H236HL:
Resolution: 1920 x 1080 @ 60Hz (1080p)
Pixel Depth: 32-Bit Color (ARGB8888)
Display Serial Number: LX1AA0034210
Mirror: Off
Online: Yes
Rotation: Supported
Television: Yes
What is the meaning of that last item, Television: Yes
? This hardware is not actually a TV, just a display with HDMI, DVI, and VGA inputs.
I understand that modern TVs are indeed just monitors with an OTA tuner and speakers implanted. But I wonder, given the lack of a tuner, what the meaning of that item in the report specifically means.
Solution
1.What does Television:Yes mean?
It means your macbook is sending the color to your display not in RGB but in YCbCr space instead of RGB,which could lead to poor picture quality.
2.Solution:
Override an EDID (Extended_Display_Identification_Data) setting to force the RGB colour space
Threads about forcing RGB mode instead of YCbCr
You can force RGB mode by following Turtorial on how to force RGB mode
This is long standing bug that Apple refuses to fix and that is not simple to work around.