EstebanIntel
commented
4 months ago Hi @alexander-laiman,
This is a known limitation for Arc A-Series GPUs, let me explain.
PC monitors and TVs work slightly different when displaying color from digital sources. When in 8-bit color mode, PC monitors are able to display the full range of colors (0 to 255), whereas TVs can only display a limited range (16 to 235).
Now, the majority of PC users use PC monitors as their display; so, having the GPU use the full range by default makes sense. However, in order to accommodate to the users who chose to use a TV as their PC display, Intel added the "Quantization Range" option to the Intel Graphis Command Center (IGCC). And, since the video interface used by TVs is HDMI, the "Quantization Range" option was made only available to HDMI outputs, more specifically, to native HDMI outputs.
The limitation comes from the Intel Arc A-Series Limited Edition cards not having a native HDMI, but rather using a PCON to convert from DP to HDMI. This results in the "Quantization Range" option not been available in IGCC for these cards. We have taken note of this limitation and will be taking it into account for future Intel Arc products.
Finally, one possible work around you might want to try is to connect you TV to the motherboard's HDMI port, instead of the Intel Arc card's HDMI port. This will cause the display functions to be managed by the iGPU, but the rendering will still be done by the Intel Arc card. Since the display functions will be handled by the iGPU, the "Quantization Range" should be avaiable in IGCC.
However, please note that the only supported hardware configurations for Intel Arc A-Series is to pair it with an 10th Gen Intel® Core™ Processors or newer or with an AMD Ryzen™ 3000 series Processors or newer (please see the full details on the supported configurations here: Intel® Arc™ A-Series Graphics – Desktop Quick Start Guide. Also, that IGCC is only supported for 6th Gen Intel® Core™ Processors or newer as described here: How to Install the Intel® Graphics Command Center From the Microsoft Store.
LadyMikea
alexander-laiman
Vipitis
Checklist [README]
Application [Required]
Windows
Processor / Processor Number [Required]
4790k
Graphic Card [Required]
A770
GPU Driver Version [Required]
31.0.101.5594
Other GPU Driver version
No response
Rendering API [Required]
Windows Build Number [Required]
Other Windows build number
No response
Intel System Support Utility report
report.txt
Description and steps to reproduce [Required]
As written prior, installing the intel arc graphics card drivers sets RGB output range on the card to be limited, with no controls for setting it to full. When the Graphics card driver is cleanly uninstalled and the computer falls back to builtin windows drivers, blacks are correctly represented in the display. Installing the drivers causes blacks to become washed out again.
This happens in my case with the PC connected directly to the display, a Samsung TV UN55fh6003 with black level controls in the menu which supports limited and full, or when its connected to the AV receiver, an integra DRX 5.2, which then passes the signal to the display.
This bug was introduced after drivers 31.0.101.4577 where it last set blacks correctly, as evidenced in this reddit post from a user having the same issue. https://www.reddit.com/r/IntelArc/comments/1cwoqv6/colors_washed_out_on_secondary_monitor/
This issue is a recreation of #801 which was closed quickly when I didnt follow up.
Device / Platform
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Crash dumps [Required, if applicable]
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Application / Windows logs
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