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Drivers & Software

fsadough
Staff
Staff

Re: Windows 10 RGB444 4K 60hz 10bits mode issue

Please provide me with your EDID. That is all I need. However I am not sure if you saw my comment in the other thread. We have identified a different behaviour of 19.Q1.1 driver vs 18.Q1.1 with some BenQ monitors. I have created an internal ticket for our display team and the issue is being investigated. 

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mudkips
Adept I
Adept I

Re: Windows 10 RGB444 4K 60hz 10bits mode issue

It's 8 bit plus FRC. It accepts 10bpc signals just fine when under the DP 1.2 bandwidth limit.

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mudkips
Adept I
Adept I

Re: Windows 10 RGB444 4K 60hz 10bits mode issue

Do I just grab this from the registry?  Or should I use something like NirSoft DumpEDID?

I've actually decided to return the monitor (primarily because AOC support is very, very underwhelming (it took them weeks to send me a manual for the thing, the page website has incorrect specs listed, the driver link points to a driver for a different monitor, etc. etc.).

I'll be swapping it out later today.  I'll still provide the EDID though, in the hopes that it can help someone else or help AMD figure out if there's some pattern with different displays.

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mudkips
Adept I
Adept I

Re: Windows 10 RGB444 4K 60hz 10bits mode issue

From registry:

"EDID"=hex:00,ff,ff,ff,ff,ff,ff,00,05,e3,30,27,d1,01,00,00,31,1c,01,04,b5,3c,22,78,3f,18,d1,ae,50,48,a6,25,12,50,54,bf,ef,00,d1,c0,81,80,31,68,31,7c,45,68,45,7c,61,68,61,7c,56,5e,00,a0,a0,a0,29,50,30,20,35,00,55,50,21,00,00,1e,40,e7,00,6a,a0,a0,67,50,08,20,98,04,55,50,21,00,00,1a,00,00,00,fc,00,41,47,32,37,33,51,53,34,52,34,0a,20,20,00,00,00,fd,00,30,90,e6,e6,3c,01,0a,20,20,20,20,20,20,01,94

From NirSoft's DumpEDID (if this is accurate as to what the monitor's putting out, then wow):

DumpEDID v1.07

Copyright (c) 2006 - 2018 Nir Sofer

Web site: http://www.nirsoft.net

*****************************************************************

Active                   : Yes

Registry Key             : DISPLAY\AOC2730\5&2fec0a7a&2&UID256

Monitor Name             : AG273QS4R4

Manufacture Week         : 49 / 2018

ManufacturerID           : 58117 (0xE305)

ProductID                : 10032 (0x2730)

Serial Number (Numeric)  : 465 (0x000001D1)

EDID Version             : 1.4

Display Gamma            : 2.20

Vertical Frequency       : 48 - 144 Hz

Horizontal Frequency     : 230 - 230 KHz

Image Size               : 59.7 X 33.6 cm (27.0 Inch)

Maximum Image Size       : 60 X 34 cm (27.2 Inch)

Maximum Resolution       : 2560 X 1440

Support Standby Mode     : No

Support Suspend Mode     : No

Support Low-Power Mode   : Yes

Support Default GTF      : Yes

Digital                  : Yes

Supported Display Modes  :

     720 X  400  70 Hz

     640 X  480  60 Hz

     640 X  480  67 Hz

     640 X  480  72 Hz

     640 X  480  75 Hz

     640 X  480  100 Hz

     640 X  480  120 Hz

     800 X  600  56 Hz

     800 X  600  60 Hz

     800 X  600  72 Hz

     800 X  600  75 Hz

     800 X  600  100 Hz

     800 X  600  120 Hz

     832 X  624  75 Hz

    1024 X  768  60 Hz

    1024 X  768  70 Hz

    1024 X  768  75 Hz

    1024 X  768  100 Hz

    1024 X  768  120 Hz

    1280 X 1024  60 Hz

    1280 X 1024  75 Hz

    1920 X 1080  60 Hz

    2560 X 1440  60 Hz

*****************************************************************

Again, this is an AOC AG273QCX (despite it being identified as AG273QS4R4), and it DOES work at 10bpc at 2560x1440@120 Hz, and DOES work at 8bpc at 2560x1440@144 Hz, but not 10bpc @ 144 Hz (unless I  switch to 4:2:2).

And again, it's going back to Amazon, but I'm providing the info in case it can be of use to others / AMD.

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renner
Adept II
Adept II

Re: Windows 10 RGB444 4K 60hz 10bits mode issue

Hey, folks. I just stumbled upon this thread, I got the Benq PD3200U yesterday, combined with Vega 64, and I'm unable to output 10 bit 4:4:4, it just reverts back to 8bit after trying to select it. However, I'm also using beside it its predecessor, BL3201PT, which is also a 10bit panel (8bit+FRC), and in there 10bit works without any issues at 4:4:4. I'll post driver screenshots when I get back home soon.

I tried the mini DP cable that was shipped with it, the DP cable I just bought today, and the DP I used so far with my previous panel, nothing helped. I'm on Windows 10, and the 19.2.3 driver. Older BL3201PT also, surprisingly, supports Freesync (48-60Hz), but PD3200U doesn't offer it, and I hoped since its pretty much the same AU Optronics panel inside. Maybe its related...

Edit: here's the pic.

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fsadough
Staff
Staff

Re: Windows 10 RGB444 4K 60hz 10bits mode issue

Fixed in 19.Q2 driver available on May 8th.


Root cause:

Whenever a monitor has a CEA extension block with a CEA SVD for 3840x2160@60Hz the current and some previous drivers (except 18.Q1.1 and older) use 594MHz pixel clock and for that we do not have enough bandwidth to do 10bpc, that's why the color depth jumps back to 8bpc. Obviously the monitors without the above mentioned CEA extension block did not have any issues reporting 10bpc/RGB444/4K@60Hz

CEA extension block with a CEA SVD is mostly used for digital TVs & HDMI connections


Interim Workaround:

Emulate the EDID of your monitor with a Bit Rate of 8.1 GHz, that might work for some monitors. If you need assistance with that, PM me.

Exception:

BenQ EW3270 still reports 594MHz, which seems to be a monitor issue (still under investigation). However changing the Bit Rate to 8.1GHz (HBR3) resolves the issue.

renner
Adept II
Adept II

Re: Windows 10 RGB444 4K 60hz 10bits mode issue

Thx for the response. Looking forward for May then.

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fsadough
Staff
Staff

Re: Windows 10 RGB444 4K 60hz 10bits mode issue

To better understand the problem, just take a look at these two screenshots for 4K@60Hz/10bpc/RGB444 configurations. One is by VESA standard reporting a Pixel Clock of 533.25 MHz and the other by DCI standard reporting a Pixel Clock of 594 MHz.4K_Pixel_Clock_Vesa.jpg4K_Pixel_Clock_DCI.jpg

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cplifj
Adept III
Adept III

Re: Windows 10 RGB444 4K 60hz 10bits mode issue

check if this is set to 60Hz and not 59Hz.  see screenshot.

screensettings.png

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tbsteel
Adept I
Adept I

Re: Windows 10 RGB444 4K 60hz 10bits mode issue

Since my monitor is a BenQ EW3270, do you mind telling us how to change the bitrate or shall we wait for the patch?

That's actually the very first real response I read that has a possible solution to it.

Really appreciate what you're doing for us!

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