Custom Resolution Utility (CRU)

[ToastyX]

(04-27-2023 10:22 PM)Thumedan Wrote:  Hey, i am using streamlabs preview on second fake screen which is emulated by hdmi dummy. This is necessary for me to run some kind of scripts that i use. I dont need to see this preview but my ahk need this in that position.
My main monitor - real one is working On 2k@144hz and basicly this dummy can work up to 4k@60hz. Its not good at this 60hz since i feel freezes while playing On 60 or even 120hz. It goes back to smooth and nice when i set custom resolution in nVidia geforce to 2k@144hz for this dummy but after restart.exe or just reboot my computer is not responding at all. It can boot Windows but there is no login screen. Caps lock not reacting. Then i have to unplug dummy, restart pc, reset all, plug dummy then set my custom resolution again. And it works like it should. Untill some kind of restart/ reboot. Any clue how to solve it to not brother with this pain in the ass job with plugout, reset all plug in and set again every reboot?


"This is an NVIDIA driver bug and should be reported to them. The black screen is the driver crashing, not a resolution issue as you've figured out."
it's same problem in my case?

Yes, CRU doesn't do anything except create a description of what the monitor supports, so if the driver crashes, that's a driver bug. Just make sure there's at least 2 bytes for data blocks in the CTA-861 extension block because that's another NVIDIA driver bug that can cause a crash. Also for HDMI 2.0, the pixel clock can't exceed 600 MHz.

[alexaedita]

As of 04/29/23 latest driver 23.4.3 AMD 7900XT still doesn't allow custom EDID set with CRU. What a shame.

[DragonQ]

(04-29-2023 03:36 PM)alexaedita Wrote:  As of 04/29/23 latest driver 23.4.3 AMD 7900XT still doesn't allow custom EDID set with CRU. What a shame.

Hi, a few questions about this issue:
- Is it only RDNA3 cards that are affected?
- I use CRU to change my monitor's FreeSync range. Would this be ignored with the latest drivers?
- What's the most recent driver that works fine with CRU?

Thanks.

[alexaedita]

(05-02-2023 09:21 AM)DragonQ Wrote:  

(04-29-2023 03:36 PM)alexaedita Wrote:  As of 04/29/23 latest driver 23.4.3 AMD 7900XT still doesn't allow custom EDID set with CRU. What a shame.

Hi, a few questions about this issue:
- Is it only RDNA3 cards that are affected?
- I use CRU to change my monitor's FreeSync range. Would this be ignored with the latest drivers?
- What's the most recent driver that works fine with CRU?

Thanks.

CRU on my 6700XT worked fine several month ago before I sold it.
I would not remember at this point what was the driver I was using at that time. When I switched to RDNA 3, I was "forced" to use drivers specifically designed for RDNA 3 cards. Now RDNA 2 and 3 use same driver system, so I would think CRU does not work with RDNA 2 at this time.
This is not GPU related issue, I would think, it's a driver issue - at least people with more experience than me have said it on this forum.
AMD needs to unlock custom EDID's on their end.

[sulivandhi]

Hello dear ToastyX,
The current max Hres and Vres are both 4095. I checked the src files and found them defined in "DetailedResolutionClass.cpp". I don't know how to compile your source codes. Would you please consider supporting higher resolution values in the next release? For example, max 10240 x 10240 would be great!!!

[Travis5151]

Hello,

I am having a difficult time figuring out how to use this to resolve flickering/stroking with freesyns (nvidia gsync enabled) and my Sansung 800b tv (connect hdmi 2.1 through Yamaha a2a receiver) and was hoping I could get some help.

In windows I have 4k 120 selected and it works great without gync enabled. Once I enable it in some games I get the brightness flicker. I have loaded cru and added the below as picture
Am I doing it right? How do I apply it? I did reset 64 but in game I don't see a difference and I am unsure how to verify it. I added the resolutions in the cta 861 block as the detailed resolution area won't let me chooseb120 hz. It goes red.            

[ToastyX]

(05-06-2023 06:56 PM)Travis5151 Wrote:  Hello,

I am having a difficult time figuring out how to use this to resolve flickering/stroking with freesyns (nvidia gsync enabled) and my Sansung 800b tv (connect hdmi 2.1 through Yamaha a2a receiver) and was hoping I could get some help.

In windows I have 4k 120 selected and it works great without gync enabled. Once I enable it in some games I get the brightness flicker. I have loaded cru and added the below as picture
Am I doing it right? How do I apply it? I did reset 64 but in game I don't see a difference and I am unsure how to verify it. I added the resolutions in the cta 861 block as the detailed resolution area won't let me chooseb120 hz. It goes red.

You would need to edit the VRR range in the HDMI 2.x data block in the existing CTA-861 extension block, not create a new extension block. NVIDIA does not use the FreeSync data block.

[ToastyX]

(05-06-2023 01:32 PM)sulivandhi Wrote:  Hello dear ToastyX,
The current max Hres and Vres are both 4095. I checked the src files and found them defined in "DetailedResolutionClass.cpp". I don't know how to compile your source codes. Would you please consider supporting higher resolution values in the next release? For example, max 10240 x 10240 would be great!!!

You need to read the first post. This is an EDID limitation, not CRU. You can add higher resolutions with DisplayID extension blocks.

[ToastyX]

(05-02-2023 09:21 AM)DragonQ Wrote:  Hi, a few questions about this issue:
- Is it only RDNA3 cards that are affected?
- I use CRU to change my monitor's FreeSync range. Would this be ignored with the latest drivers?
- What's the most recent driver that works fine with CRU?

The issue is limited to 7000-series GPUs only.

[Travis5151]

(05-06-2023 09:09 PM)ToastyX Wrote:  

(05-06-2023 06:56 PM)Travis5151 Wrote:  Hello,

I am having a difficult time figuring out how to use this to resolve flickering/stroking with freesyns (nvidia gsync enabled) and my Sansung 800b tv (connect hdmi 2.1 through Yamaha a2a receiver) and was hoping I could get some help.

In windows I have 4k 120 selected and it works great without gync enabled. Once I enable it in some games I get the brightness flicker. I have loaded cru and added the below as picture
Am I doing it right? How do I apply it? I did reset 64 but in game I don't see a difference and I am unsure how to verify it. I added the resolutions in the cta 861 block as the detailed resolution area won't let me chooseb120 hz. It goes red.

You would need to edit the VRR range in the HDMI 2.x data block in the existing CTA-861 extension block, not create a new extension block. NVIDIA does not use the FreeSync data block.

Thank you for the reply but the existing block only show 60 hz. How do I get ti to show the 120 I am using?

As an additional bit of information I narrowed it down to having hdr enabled. With it off the brightness flicker seems to go away. Also if I connect pc to tv then it goes away even with hdr enabled but the samsung does not output atmos to my receiver for some reason so I can't do this.