Custom Resolution Utility (CRU)

[ToastyX]

(06-18-2022 06:07 PM)LIGHT Wrote:  Hi! Need help! I use Vega 64 Pixel 4.2.0, TV Samsung Q80T(game mod, HDMI 2.1 port, FreeSync) and HDMI 1.4 cable. While using driver version 21.5, it could work in 120hz UHD mode (atikmdag-patcher). After updating the driver to version 21.12.1 - 120hz disappeared from the list - CRU helped. Now I installed the latest drivers 22.5.2 and I can’t run UHD 120hz Freesync - no 120hz setting, atip and CRU dont help.

How did CRU help? What did you do with CRU? The patcher was not made for that situation, so I don't understand how that helped either. This really sounds like a driver issue that should be reported to AMD.

[ToastyX]

(06-17-2022 09:52 PM)ruisuVL Wrote:  I'm new to this and have a question: is it possible to display scale with my 360hz monitor? I have the aw2521h and when I try to set up a custom resolution with 360hz the number turns red and I can't click "ok".

This is answered in the first post.

[pneumatic]

Hello,

Is there a trick to getting both n/1 and n/1.001 modes exposed through Windows display settings dialog?

eg. On my Nvidia system, I can create with CRU the following modes: [23.976hz, 24.000hz, 59.940hz, 60.000hz, 119.88hz, 120.00hz] and these will appear in Windows display settings as [23hz, 24hz, 59hz, 60hz, 119hz, 120hz].

However on my AMD GPU system, I only get [24hz, 60hz, 120hz] appearing in Windows display settings.

The trick to getting all modes exposed on the Nvidia system was to add them to a new DisplayID 1.3 block in CRU and delete the corresponding n/1 modes from the CTA block's "TV resolutions" sections.

However this trick doesn't work on my AMD system. The only way I can get both n/1 and n/1.001 modes exposed is by creating the missing n/1.001 ones in Radeon Settings custom resolution utility. However that utility sucks and is full of bugs (which I can work around, but it's still janky and I much prefer to use CRU).

I tried auditing the registry with tool RegScanner to see what registry keys were being modified when clicking Apply in Radeon Settings custom resolution, but I couldn't glean anything coherent.

My current hypothesis is that perhaps it's up to the GPU driver whether it adds modes from the EDID to the list of modes exposed through Windows display settings. I'm guessing there is some WinAPI function that does that which Nvidia is calling but AMD isn't.

On the other hand, this article says that both n/1 and n/1.001 modes should be exposed, so I don't really know what's going on.

[ToastyX]

(06-20-2022 09:02 AM)pneumatic Wrote:  Is there a trick to getting both n/1 and n/1.001 modes exposed through Windows display settings dialog?

eg. On my Nvidia system, I can create with CRU the following modes: [23.976hz, 24.000hz, 59.940hz, 60.000hz, 119.88hz, 120.00hz] and these will appear in Windows display settings as [23hz, 24hz, 59hz, 60hz, 119hz, 120hz].

Historically, CRU has not been able to do this. Anything in the [23.5, 24.5) range is considered to be 24 Hz by Windows, so only the first one defined takes effect. In some cases, the driver will add 23 Hz as an alias of 24 Hz. NVIDIA does this for TV resolutions or if the lower version is defined. AMD only does this for TV resolutions. The only way around this is to define the lower version using AMD's control panel because it can specify the listed refresh rate (at the top) separately from the actual refresh rate (G.Refresh Rate). There's no way to do this with EDID overrides. The behavior of listing 23.976 Hz as 23 Hz if 24 Hz exists seems to be NVIDIA-specific because both should be considered 24 Hz, and I don't remember NVIDIA doing this before, so I don't know if this changed at some point.

Newer versions of Windows are capable of having multiple fractional refresh rates, but I don't think AMD has implemented this yet. NVIDIA seems to be able to do it, but the fractional versions only appear in the Windows advanced display settings. Anything using the older APIs (including the display adapter properties) still use the integer versions.

[FrannDzs]

Hello, how are you?

I am writing because I am having problems with CRU now in Windows 11. It no longer locks the resolution as before in Windows 10. I have a GTX 550 ti on a CRT display which does not correctly recognize the supported resolution and frequency. These go higher than they really should. My max screen resolution is 1280x1024 at 60hz, and I used to set this to CRU and higher resolutions disappeared from the list, just as I expected. But now it doesn't work anymore. It shows resolutions out of support and therefore the programs start believing that my resolution is 2500x..... Do you know anything about this? I hope you can help me to solve this problem. I really used this program a lot and would like to continue using it.
If you need more information I can provide you.
Thanks in advance

[ToastyX]

(06-20-2022 10:32 PM)FrannDzs Wrote:  Hello, how are you?

I am writing because I am having problems with CRU now in Windows 11. It no longer locks the resolution as before in Windows 10. I have a GTX 550 ti on a CRT display which does not correctly recognize the supported resolution and frequency. These go higher than they really should. My max screen resolution is 1280x1024 at 60hz, and I used to set this to CRU and higher resolutions disappeared from the list, just as I expected. But now it doesn't work anymore. It shows resolutions out of support and therefore the programs start believing that my resolution is 2500x..... Do you know anything about this? I hope you can help me to solve this problem. I really used this program a lot and would like to continue using it.
If you need more information I can provide you.
Thanks in advance

It sounds like your CRT doesn't have an EDID, or the cable is missing the DDC pins. Windows 11 does not seem to process EDID overrides for displays without an EDID. You might have better luck using an HDMI to VGA adapter, which will provide a default EDID if missing, which you can then override with CRU if needed. Without an EDID, NVIDIA provides a default list of resolutions. You can edit that list by searching the registry for NV_Modes and using this guide: http://download.nvidia.com/Windows/43.45...de_2.1.pdf

[FrannDzs]

(06-21-2022 05:54 AM)ToastyX Wrote:  

(06-20-2022 10:32 PM)FrannDzs Wrote:  Hello, how are you?

I am writing because I am having problems with CRU now in Windows 11. It no longer locks the resolution as before in Windows 10. I have a GTX 550 ti on a CRT display which does not correctly recognize the supported resolution and frequency. These go higher than they really should. My max screen resolution is 1280x1024 at 60hz, and I used to set this to CRU and higher resolutions disappeared from the list, just as I expected. But now it doesn't work anymore. It shows resolutions out of support and therefore the programs start believing that my resolution is 2500x..... Do you know anything about this? I hope you can help me to solve this problem. I really used this program a lot and would like to continue using it.
If you need more information I can provide you.
Thanks in advance

It sounds like your CRT doesn't have an EDID, or the cable is missing the DDC pins. Windows 11 does not seem to process EDID overrides for displays without an EDID. You might have better luck using an HDMI to VGA adapter, which will provide a default EDID if missing, which you can then override with CRU if needed. Without an EDID, NVIDIA provides a default list of resolutions. You can edit that list by searching the registry for NV_Modes and using this guide: http://download.nvidia.com/Windows/43.45...de_2.1.pdf

Hello!, I am writing again to thank you very much. After reading carefully, I followed all the steps and managed to remove the unsupported resolutions and set 60hz only for one set of resolutions. I didn't understand much about those sets but it works now. I just added =1 at the end for lock 60hz. Thanks!!!

[Sunspark]

Hi, I am experiencing an unexpected issue with my Intel iGPU.

I was successful at using CRU w/ "Exact" drop-down to set 60.000 Hz at a native resolution of 2048x1152 (all the others set other values like 59.94).

This 60 Hz resolution is maintained on power-on/restart of the computer.

The issue is if I sleep Windows 10 and wake it up it does not re-adopt the 60 Hz refresh and instead drops down to the original driver default of 59.876 Hz for the display and 59.90 for the compositor.

The only way to make it go back to 60 is to either re-run the restart64.exe utility manually every time on wake-from-sleep or restart the machine.

Why wouldn't the original refresh rate be kept on wake-from-sleep?

Edit: I guess the answer is driver bug.. searching around I see that others have to do the same thing.. so there's this reload.exe utility and also restart64.exe which can both be called from the Windows task scheduler on wake-from-sleep so I guess that is a solution that can be set up.

[Sunspark]

I noticed there was no active extension block in Windows 10 w/ CRU but I knew one existed and it was still visible in Windows 7.

I clicked 'export' in Win7 and in W10 I clicked 'import' and now I have added "CTA-861: 4 detailed resolutions, 4 data blocks (HDMI)".

My question is, is this something that is advantageous to do, or it makes no difference to anything?

---

The other night when I was experimenting with adding a custom CVT-RB2 timing in the Intel driver settings for native resolution, I discovered an edge case on my older monitor which would cause HDCP to fail.

H V
+ + = Works
- - = FAILS HDCP
+ - = FAILS HDCP (also refresh rate slightly higher than the other 3)
- + = Works

Not a big deal, and I'm not using CVT-RB2 now, but it was interesting to observe that sync polarities actually did make a difference for HDCP. The other timing methods CVT-RB, DMT, etc. were not affected.

Polarities did not affect the display, only HDCP (black screen requiring power off).

ToastyX, do you have any theories as to why -+ would work for HDCP, but not +-?

[Jim Davis]

Hello.

I dont have a problem with resolutions, but I have recent developed some issues with Windows 10 moving apps from one monitor to another if I shut the monitor off while the pc is ON. If I make sure the monitor is ON before waking from sleep mode, I have no problem.

I know this is a common problem, taking many forms depending on the setup .

My question, would using CRU prevent this problem or mitigate it in some way ? Normally I'd read through the posts , but 670 pages is a bit much ;-)