Custom Resolution Utility (CRU)

[SyphonFilter]

Anybody? ^^

[CRTFTW]

So what would be the industry recognized term for what CRU calls "standard resolutions" in the EDID? I'm trying to use the right term for when I submit a bug report to AMD that mine aren't working correctly

Basically, my 6800 XT is having an issue where it uses reduced timings for "standard resolutions", which looks wrong on my CRT.

In the past, on other GPUs, standard resolutions would utilize GTF or CVT standard, as far as I could tell, because they looked correct.

I actually had this issue on my 5700xt but AMD fixed it at some point. But I guess the problem remained on the 6000 series.

[ToastyX]

(02-02-2024 03:05 PM)CRTFTW Wrote:  So what would be the industry recognized term for what CRU calls "standard resolutions" in the EDID? I'm trying to use the right term for when I submit a bug report to AMD that mine aren't working correctly

Basically, my 6800 XT is having an issue where it uses reduced timings for "standard resolutions", which looks wrong on my CRT.

In the past, on other GPUs, standard resolutions would utilize GTF or CVT standard, as far as I could tell, because they looked correct.

I actually had this issue on my 5700xt but AMD fixed it at some point. But I guess the problem remained on the 6000 series.

It's the standard timing block in the EDID. I don't think AMD is expecting anyone to use CRT monitors since they don't have analog outputs anymore. The new CVT standard removed CRT timings completely.

[ToastyX]

(01-30-2024 04:58 PM)SyphonFilter Wrote:  Hello, I have set my C9 to 790 nits via CRU/Windows HDR calibration tool and everything works fine. Though now I just got an 8K AVR and going through that instead of directly to the C9 and I cannot seem to calibrate the AVR's nits via CRU. The default values are stuck on 1499 nits and everything is brighter in games but also heavily crushing blacks. And when I go through the Windows HDR calibration tool, I only hit up to 530 nits which is well below what the C9 can do. Any suggestions/ideas? I have tried setting the CRU values for the AVR but nothing changes - also did a restart afterwards.

Side question, I have only used one value of 127 for both Max Luminance and Max Frame-Avg, is that not correct? Should I be using the VESA test app to find the correct Max Frame-Avg?

Thanks, first post!

What GPU? What driver version? If NVIDIA, make sure there are at least 2 bytes left for data blocks in the CTA-861 extension block. Max luminance and max frame average luminance can be the same.

[SyphonFilter]

(02-03-2024 02:13 PM)ToastyX Wrote:  

(01-30-2024 04:58 PM)SyphonFilter Wrote:  Hello, I have set my C9 to 790 nits via CRU/Windows HDR calibration tool and everything works fine. Though now I just got an 8K AVR and going through that instead of directly to the C9 and I cannot seem to calibrate the AVR's nits via CRU. The default values are stuck on 1499 nits and everything is brighter in games but also heavily crushing blacks. And when I go through the Windows HDR calibration tool, I only hit up to 530 nits which is well below what the C9 can do. Any suggestions/ideas? I have tried setting the CRU values for the AVR but nothing changes - also did a restart afterwards.

Side question, I have only used one value of 127 for both Max Luminance and Max Frame-Avg, is that not correct? Should I be using the VESA test app to find the correct Max Frame-Avg?

Thanks, first post!

What GPU? What driver version? If NVIDIA, make sure there are at least 2 bytes left for data blocks in the CTA-861 extension block. Max luminance and max frame average luminance can be the same.

Hello, my GPU is a RTX 4080 (Nvidia), set to their absolute latest driver. Okay great, my Max Luminance and max frame average luminance are both set to 127 (790 nits) for my C9.

I am not certain how to make sure at least 2 bytes are left for data blocks in the CTA-861 extension block. Is this a setting or some number I am setting somewhere in CRU? I am guessing this will either help in general setup or get my 8K AVR to recognize the CRU setup?

Thanks for responding!

[ToastyX]

(02-05-2024 06:28 PM)SyphonFilter Wrote:  Hello, my GPU is a RTX 4080 (Nvidia), set to their absolute latest driver. Okay great, my Max Luminance and max frame average luminance are both set to 127 (790 nits) for my C9.

I am not certain how to make sure at least 2 bytes are left for data blocks in the CTA-861 extension block. Is this a setting or some number I am setting somewhere in CRU? I am guessing this will either help in general setup or get my 8K AVR to recognize the CRU setup?

CRU tells you how many bytes are left in the data block list in the extension block. NVIDIA's driver has a bug that causes it to ignore all changes if there aren't at least 2 bytes left.

[SyphonFilter]

(02-06-2024 02:37 AM)ToastyX Wrote:  

(02-05-2024 06:28 PM)SyphonFilter Wrote:  Hello, my GPU is a RTX 4080 (Nvidia), set to their absolute latest driver. Okay great, my Max Luminance and max frame average luminance are both set to 127 (790 nits) for my C9.

I am not certain how to make sure at least 2 bytes are left for data blocks in the CTA-861 extension block. Is this a setting or some number I am setting somewhere in CRU? I am guessing this will either help in general setup or get my 8K AVR to recognize the CRU setup?

CRU tells you how many bytes are left in the data block list in the extension block. NVIDIA's driver has a bug that causes it to ignore all changes if there aren't at least 2 bytes left.

So what exactly do I need to do to make sure I leave out 2 bytes and where exactly? Thanks I am complete new to this stuff.
PS, going from PC directly to C9 works fine and sets the brightness to exactly 790 but going through the AVR does nothing.

[ToastyX]

(02-06-2024 01:21 PM)SyphonFilter Wrote:  So what exactly do I need to do to make sure I leave out 2 bytes and where exactly? Thanks I am complete new to this stuff.
PS, going from PC directly to C9 works fine and sets the brightness to exactly 790 but going through the AVR does nothing.

Just delete something you don't need such as two TV resolutions.

[SyphonFilter]

(02-07-2024 12:37 PM)ToastyX Wrote:  

(02-06-2024 01:21 PM)SyphonFilter Wrote:  So what exactly do I need to do to make sure I leave out 2 bytes and where exactly? Thanks I am complete new to this stuff.
PS, going from PC directly to C9 works fine and sets the brightness to exactly 790 but going through the AVR does nothing.

Just delete something you don't need such as two TV resolutions.

Okay, I will try that, thanks! Hopefully it will set the correct brightness for the AVR.

[masneb]

Any idea what would cause a PG248QP to show basically no data?