Custom Resolution Utility (CRU)

[Aidorin]

(12-13-2020 03:32 PM)ToastyX Wrote:  

(12-13-2020 11:10 AM)Aidorin Wrote:  Does this CRU change or affect the internal software of the TV (as It seems), or does it only affect the PC/Nvidia driver side? And if it affects the TV software (as it seems), is there any risk that it will break it or affect the TV warranty?

CRU does not affect the hardware or firmware of the TV. It creates software EDID overrides on the PC side that are easily removed by running reset-all.exe and rebooting. Most TVs and monitors will not allow resolutions and refresh rates outside of supported limits, so they can't be damaged.

Yes, I thought about it right after I put my post that it is impossible for this program to affect or change the TV software simply through the HDMI cable that connects PC and TV. It was a slightly absurd question.

So ... do you think it can serve to remove the motion blur that feature of Nvidia that supposedly "double the frames" when the range of the VRR is restricted to 90-120? Although I don't know exactly what custom VRR range I should use. Do you have a tutorial on how to do all this?

Thanks once more.

[Epic753]

If custom CRU settings resolve an intermittent computer monitor black screen issue where does the root problem most likely reside?

[ToastyX]

(12-14-2020 01:31 AM)Epic753 Wrote:  If custom CRU settings resolve an intermittent computer monitor black screen issue where does the root problem most likely reside?

What settings?

[ToastyX]

(12-13-2020 05:05 PM)Aidorin Wrote:  Yes, I thought about it right after I put my post that it is impossible for this program to affect or change the TV software simply through the HDMI cable that connects PC and TV. It was a slightly absurd question.

So ... do you think it can serve to remove the motion blur that feature of Nvidia that supposedly "double the frames" when the range of the VRR is restricted to 90-120? Although I don't know exactly what custom VRR range I should use. Do you have a tutorial on how to do all this?

That depends on how the TV refreshes. The feature you are talking about is low frame rate compensation. If the range is 90-120, it can also do 45-60 by doubling the frames. Motion blur is caused by persistence of vision combined with sample and hold, which means the pixels stay lit the entire time. If the TV does sample and hold, then not doubling the frames won't affect motion blur because the second refresh is redundant anyway. If the TV uses black frame insertion (BFI), which blacks out the screen after every refresh to reduce motion blur, then doubling the frames causes a double image effect when following motion, so expanding the VRR range would help there. Doesn't the CX55 already have a VRR range of 40-120? According to the RTINGS review, it's capable of doing both methods, but BFI is disabled when VRR is enabled: https://www.rtings.com/tv/reviews/lg/cx-oled

[Epic753]

(12-14-2020 03:43 AM)ToastyX Wrote:  

(12-14-2020 01:31 AM)Epic753 Wrote:  If custom CRU settings resolve an intermittent computer monitor black screen issue where does the root problem most likely reside?

What settings?

I had 4 day's no failures when I just posted that question a little earlier. I thought it was resolved but ten minutes ago after I posted the question it happened again, nvlddmkm in event viewer during all occurrences.

I followed the instructions in this link (did not reset the audio settings in steps 4-11).

I had no issues till just now. Web browsing, seems it might be related to youtube/scrolling. Display freezes and or mouse freeze then black screen then recovers..

So now i'm not sure if this helped or the issue got less intermittent. It was happening 1-3 times a day, since brand new build. It seemed like CRU fixed it. And I don't know if the CRU settings can "improve" the issue.

https://motherbear.home.blog/2019/12/10/...creen-fix/

[Aidorin]

(12-14-2020 03:54 AM)ToastyX Wrote:  

(12-13-2020 05:05 PM)Aidorin Wrote:  Yes, I thought about it right after I put my post that it is impossible for this program to affect or change the TV software simply through the HDMI cable that connects PC and TV. It was a slightly absurd question.

So ... do you think it can serve to remove the motion blur that feature of Nvidia that supposedly "double the frames" when the range of the VRR is restricted to 90-120? Although I don't know exactly what custom VRR range I should use. Do you have a tutorial on how to do all this?

That depends on how the TV refreshes. The feature you are talking about is low frame rate compensation. If the range is 90-120, it can also do 45-60 by doubling the frames. Motion blur is caused by persistence of vision combined with sample and hold, which means the pixels stay lit the entire time. If the TV does sample and hold, then not doubling the frames won't affect motion blur because the second refresh is redundant anyway. If the TV uses black frame insertion (BFI), which blacks out the screen after every refresh to reduce motion blur, then doubling the frames causes a double image effect when following motion, so expanding the VRR range would help there. Doesn't the CX55 already have a VRR range of 40-120? According to the RTINGS review, it's capable of doing both methods, but BFI is disabled when VRR is enabled: https://www.rtings.com/tv/reviews/lg/cx-oled

Yes, the LG CX has a VRR range of 40-120. But, from what I have understood so far, what I should do is to reduce that range, not to 'expand' it (as you said). And yes, the LG CX also has a BFI system, but it reduces the brightness and image quality, and as you correctly said, the VRR cannot be used at the same time as the BFI.

What I thought that perhaps could be achieved with those ideas that come out in the Reddit post that I put and your CRU program, is that Nvidia's LFC maybe would do something similar to what the BFI does, and it would eliminate the motion blur but without loss of brightness and quality.

Well, it is a bit difficult to speculate about all this, because this are techniques that I do not quite understand how they work, so speculation is even more difficult. Perhaps it would be best to start testing and see the results, although I'm not sure where I should start. With a 90-120 range custom VRR?

[ship1666]

Hi ToastyX and everyone, help me

I just buy three LG CX48 for sim racing. I never use triple monitor before. After I run Nvidia Surround, it does not work. There is only one resolution I can choose which is 12288x2160. After I apply, only one work with weird resolution. However, two others have no signal. I find solutions on YouTube that how I know CRU. I try to solve the problem step by step

https://www.youtube.com/watch?v=9PatN3WYoEo
https://www.youtube.com/watch?v=vAjV40CnAeA&t=29s

However, it does not work. As a result, there is only one resolution I can choose which is 12288x2160. I do not know how to go on so please guild me how can I run Nvidia Surround with 5760x1080 or 7680x1440

Therefore, I attach 4 picture in here which are my computer spec and information of CX48 in CRU

PS. I use three normal display port to hdmi adaptor.

Sincerely

[Ughduty]

Hi ToastyX,

I used your tool for years on older Micrsoft Surface Pro 3, 4 and 6 and it worked fine. Thank you for providing a free tool like CRU. However on my new Microsoft Surface Pro 7 it always results in a black screen after I restart the Surface. I tried different 3:2 resolutions but it's always the same. I'm using the latest version if CRU. Do you have any idea how to resolve this? Btw. with the old "Intel Graphics Command Center" v1.100.2731.0 I was able to add the desired resolutions but would prefer to continue using CRU.

Kind Regards
Ughduty

[ToastyX]

(12-14-2020 04:44 AM)Epic753 Wrote:  I had 4 day's no failures when I just posted that question a little earlier. I thought it was resolved but ten minutes ago after I posted the question it happened again, nvlddmkm in event viewer during all occurrences.

I followed the instructions in this link (did not reset the audio settings in steps 4-11).

I had no issues till just now. Web browsing, seems it might be related to youtube/scrolling. Display freezes and or mouse freeze then black screen then recovers..

So now i'm not sure if this helped or the issue got less intermittent. It was happening 1-3 times a day, since brand new build. It seemed like CRU fixed it. And I don't know if the CRU settings can "improve" the issue.

https://motherbear.home.blog/2019/12/10/...creen-fix/

That doesn't sound like the same problem. Do you have the Lenovo Legion Y27q-20? The problem in the link describes a monitor-specific issue with certain frame rates not working correctly with G-SYNC. Your problem sounds like the driver is crashing, which could be a hardware issue. What does the nvlddmkm event in the event viewer say?

[ToastyX]

(12-14-2020 11:30 AM)Aidorin Wrote:  Yes, the LG CX has a VRR range of 40-120. But, from what I have understood so far, what I should do is to reduce that range, not to 'expand' it (as you said). And yes, the LG CX also has a BFI system, but it reduces the brightness and image quality, and as you correctly said, the VRR cannot be used at the same time as the BFI.

What I thought that perhaps could be achieved with those ideas that come out in the Reddit post that I put and your CRU program, is that Nvidia's LFC maybe would do something similar to what the BFI does, and it would eliminate the motion blur but without loss of brightness and quality.

Well, it is a bit difficult to speculate about all this, because this are techniques that I do not quite understand how they work, so speculation is even more difficult. Perhaps it would be best to start testing and see the results, although I'm not sure where I should start. With a 90-120 range custom VRR?

Reducing the range to 90-120 would cause frame doubling at 45-60, which you said you were trying to avoid. If the range is 40-120, then it's only doing frame doubling below 40 FPS. Either way, that's not going to affect motion blur. The link was talking about brightness flickering and overdrive artifacts causing ghosting, not motion blur. BFI is the only way to reduce motion blur.