Custom Resolution Utility (CRU)

[leandroromao86]

Good night everyone.
Got an Intel ARC A770 GPU and after that Windows reports that my monitor, a LG Ultragear 32GN600-B, does not support HDR, but it used to work perfectly with my old Radeon RX 6600 GPU.
Talking with the Intel support they discovered the following:

"Hello LeandroRomao



Our driver debug team has reviewed and worked on this issue as well as the past reports from other LG monitors and determined the display panel is not using the correct value for StaticMetadataType1 field in the EDID, thus the graphics driver understands the monitor as not HDR capable. Enabling this field in the EDID is the standard way for displays to communicate the HDR capabilities to the GPU.



We suspect the panel is sending different info depending on the GPU detected this is why it is working on other GPUs. In this case, the fix and added compatibility will need to come from LG so please contact them directly so they can help further with this issue.



Best Regards,



Hugo O.

Intel Customer Support Technician."

Already contacted LG and they basically told me they will fix it on their next products, can you believe it?
Do you guys think CRU can help me fix the wrong EDID information?
I'm using Windows 11 23H2 and connecting with a DisplayPort cable, the one that came with the monitor and worked perfectly with the Radeon.

Thanks in advance!

[ToastyX]

(11-16-2023 11:31 PM)leandroromao86 Wrote:  We suspect the panel is sending different info depending on the GPU detected this is why it is working on other GPUs. In this case, the fix and added compatibility will need to come from LG so please contact them directly so they can help further with this issue.

I don't think it's possible for the monitor to detect the GPU, and the EDID shouldn't change based on the source. If the EDID is wrong, the other GPU's driver might be ignoring or working around the incorrect information.

(11-16-2023 11:31 PM)leandroromao86 Wrote:  Already contacted LG and they basically told me they will fix it on their next products, can you believe it?
Do you guys think CRU can help me fix the wrong EDID information?

It might be possible if Intel's driver listens to EDID overrides for HDR, but CRU can't read extension blocks with Intel GPUs, so you need another method to get the EDID. See if this works and post the edid-dump.txt here if it does: https://www.monitortests.com/edid-dump.zip

[ToastyX]

(11-15-2023 11:46 PM)Poilaucul Wrote:  Hi,

A bit of context first, I use OBS to stream my desktop via display capture source, the stream is running almost 23/5, as you can imagine sometimes I'm not active on the computer and during that time I use Display Power Off Utility to trigger Windows turning my displays off, this has the advantage of being instantaneous and most importantly not modifying the placement of my opened windows when I get back on the computer, and that's really important to me.

The issue I'm facing is during the time my screen is off programs that are in foreground have their graphics frozen and I would want them to refresh as if I was one the computer screen on.

Everything works perfectly as I want it to when I turn my screen off via their power buttons (but still powered via wall socket)....until DisplayPort rapid hot plug detect kicks messes everything up.

You can learn more about the issue there
https://www.datapro.net/techinfo/hot_plu...ction.html
https://hackaday.io/project/170643-edido...rt-hotplug

So, I looked for solutions to keep my displays attached while powered off, so far it's either:

- Buy an hardware EDID stopper, which doesn't support 4K@60fps
- Buy a Quadro GPU to do EDID emulation of connected display
- Have CRU do it

Last solution is my favorite but frankly I don't know what the f I'm doing, and I don't even know if CRU can do what I want so I need your help guys please.

How do I set CRU to stop Windows from disconnecting my displays when I turn them off?

CRU does not emulate displays, so it can't stop the display from disconnecting. The issue with graphics freezing while the screen is off seems odd to me because graphics should continue to render unless it's a vsync issue. The only idea I have involving CRU is an odd one that I haven't suggested before so I don't know the success rate: try adding the resolution you want with a 5 Hz refresh rate and see if the monitor turns off when you apply 5 Hz. That way Windows will think the monitor is still turned on at the native resolution, but any programs that use vsync might render at 5 Hz. If that works for you, then you can add hotkeys to change refresh rates using this program: https://funk.eu/hrc/

The only other idea I have is using an HDMI EDID emulator that supports 3840x2160 @ 60 Hz. You don't have to hook up a display to it. You can just connect it like a second monitor and set Windows to duplicate the displays (make sure to set the same resolution and scale for the EDID emulator first). Then if the display disconnects, the EDID emulator should still be active to keep the resolution active. I know for sure this one works: https://www.amazon.com/dp/B07YMTMMH5/?tag=mtests-20#ad

[ToastyX]

(11-15-2023 10:20 PM)jeffeh12133 Wrote:  Hey, I have a quick question. I currently use a Acer XB253Q GP via DisplayPort. I've been messing around with CRU and I noticed that, by default, my native resolution is detailed 1920x1080 @ 60hz but it seems like there is also a duplicate 1920x1080 @ 60hz under standard. This is all default. Why is this? Should I delete the "standard" 1920x1080@60 and leave the detailed one? what is the difference exactly? i'm confused. I deleted one and been trying out some games and it looks/feels different. I dont understand why

Displays sometimes define the same resolutions multiple ways even though it's not necessary. Likely it's also listed as a TV resolution in the CTA-861 extension block. The detailed resolution should be taking precedence anyway if the same resolution exists. The problem with standard resolutions is there's no guarantee it will use any particular timing parameters. The driver is supposed to use the DMT standard first, which happens to match the CTA-861 standard for 1920x1080 @ 60 Hz, so likely they are the exact same anyway. For other resolutions, they tend to favor timing parameters intended for CRT monitors that use more bandwidth, which is why I don't recommend using standard resolutions for anything other than lower resolutions. Also Windows only cares about the resolution part of the first detailed resolution when determining the native resolution, so it doesn't matter if the highest refresh rate is somewhere else.

[ToastyX]

(11-14-2023 08:35 PM)Nodens Wrote:  Is this not the mechanism described above? That in D0 the monitor is allowed to do that according to spec? Or I'm reading that wrong? (The spec is huge so I'm searching through parts that seem related at his point).

Those power states are different from the display power management states in the EDID and Windows since they are implemented on the sink's end instead of the source, so it's up to the monitor and not something Windows can control.

[leandroromao86]

(11-17-2023 02:20 AM)ToastyX Wrote:  

(11-16-2023 11:31 PM)leandroromao86 Wrote:  We suspect the panel is sending different info depending on the GPU detected this is why it is working on other GPUs. In this case, the fix and added compatibility will need to come from LG so please contact them directly so they can help further with this issue.

I don't think it's possible for the monitor to detect the GPU, and the EDID shouldn't change based on the source. If the EDID is wrong, the other GPU's driver might be ignoring or working around the incorrect information.

(11-16-2023 11:31 PM)leandroromao86 Wrote:  Already contacted LG and they basically told me they will fix it on their next products, can you believe it?
Do you guys think CRU can help me fix the wrong EDID information?

It might be possible if Intel's driver listens to EDID overrides for HDR, but CRU can't read extension blocks with Intel GPUs, so you need another method to get the EDID. See if this works and post the edid-dump.txt here if it does: https://www.monitortests.com/edid-dump.zip

Good morning and thanks for answering.

(11-16-2023 11:31 PM)leandroromao86 Wrote:  We suspect the panel is sending different info depending on the GPU detected this is why it is working on other GPUs. In this case, the fix and added compatibility will need to come from LG so please contact them directly so they can help further with this issue.

Yes, I agree, sounded weird from the begining.

I ran the edid-dump executable, it opened a command prompt or 2 and instantly closed and generated the dump. It is attached.

Hope you can help me!

Thank you very much!

[ToastyX]

(11-17-2023 10:15 AM)leandroromao86 Wrote:  I ran the edid-dump executable, it opened a command prompt or 2 and instantly closed and generated the dump. It is attached.

Import the edid-dump.txt file using CRU. Then edit the CTA-861 extension block. Then edit the HDR static metadata block. Then enable the "Type 1" checkbox. Then click all the OK buttons and reboot. See if that works.

[evgs]

I'm so confused, can you help me?
I have almost same two old laptops/netbooks: Asus eeePC 1015PEM (intel GMA3150 only) and 1015BN (GMA3150 + Nvidia ION2).
Both of them have identical TN-matrix (1024x600 native res)
I want to add 50Hz mode for smooth emulation of European C64, PAL NES and other old retro videogame emulators running at PAL mode.

I've added 50Hz mode for 1015BN (ION2 mode) using CRU 1.5.2 and it runs perfectly!
I used template for 65Hz, that was already present in current driver.
res: 1024x600
Front porch: 93/17
Sync width: 35/5
Back porch 88/16
Refresh: 50.000 Hz

I try to do same job on second netbook (GMA3150) using standard method or EXE-export, but no luck.

[leandroromao86]

(11-17-2023 02:13 PM)ToastyX Wrote:  

(11-17-2023 10:15 AM)leandroromao86 Wrote:  I ran the edid-dump executable, it opened a command prompt or 2 and instantly closed and generated the dump. It is attached.

Import the edid-dump.txt file using CRU. Then edit the CTA-861 extension block. Then edit the HDR static metadata block. Then enable the "Type 1" checkbox. Then click all the OK buttons and reboot. See if that works.

Thanks for the answer.
Tried it but got no luck. Windows still says monitor does not support HDR. Funny fact is that it supports HDR via HDMI, but at a much lower frame rate and I lose FreeSync support (VRR).
Do I have any other options?

Thanks again.

Edit: found some options that can be related to HDR, should I mess with them? Screenshots are attached.
Thanks!

[evgs]

I've just added 50Hz to Acer 1830T laptop (intel HD graphics, ver.8.15.10.2993, 30-jan-2013) using *.EXE-export method.
It really works like a charm, thank you for great software!

But i have a doubt, did I do it right way?
I've copy-paste all the parameters (front porch, sync width, back porch) from existing 60Hz mode, which actually presents at default EDID

Is it correct? Maybe i need different parameters?