madVR - high quality video renderer (GPU assisted)

[johnnylaiyee]

Is anyone here running a gtx1050ti for upscaling 1080p24 to 4k?

I consider buying a new gtx1050ti (4gb) or 1060 (6gb) for upscaling 1080p24 to my uhd tv. I wonder if it has enough power using ngu high for luma and ngu aa mid for chroma...
I'm using a 1050 2gb and upscaling 1080p to 2160p with luma ngu high chroma superxbr 200% without any issue. Averaging around 28ms.
Is anyone here running a gtx1050ti for upscaling 1080p24 to 4k?

I consider buying a new gtx1050ti (4gb) or 1060 (6gb) for upscaling 1080p24 to my uhd tv. I wonder if it has enough power using ngu high for luma and ngu aa mid for chroma...


Sent from my LG-H860 using Tapatalk

[HillieSan]

Is anyone here running a gtx1050ti for upscaling 1080p24 to 4k?

I consider buying a new gtx1050ti (4gb) or 1060 (6gb) for upscaling 1080p24 to my uhd tv. I wonder if it has enough power using ngu high for luma and ngu aa mid for chroma...

What is wrong with your RX 480?

[Sunset1982]

GTX 1060 3Gb, 1080p doubling, NGU AA med + NGU Sharp high = 20.6..21.00ms
For 1080p60 -> WQHD I use sXBR 125 + NGU Sharp med.

I'm using a 1050 2gb and upscaling 1080p to 2160p with luma ngu high chroma superxbr 200% without any issue. Averaging around 28ms.


good to know, thx!


What is wrong with your RX 480?

Got HDMI connection errors sometimes during movies and getting black screen video, while audio still works. Got a friend having same problems. So I put the rx480 into my gaming pc.

[huhn]

Got HDMI connection errors sometimes during movies and getting black screen video, while audio still works. Got a friend having same problems. So I put the rx480 into my gaming pc.

had the same problem and AMD was playing on time.
that's the only reason i had to replace it.

[mzso]

Hi!

How good is madVR's deinterlacing considered? Becuse I see a lot of combing artifacts. And I'm not sure whether it's working correctly or not. (madvr shows "deinterlacing on")

[huhn]

video mode deinterlancing is DXVA deinterlancing.
film mode deinterlancing is a field match algorithm that can do more you will get combing with it if you run it on true interlanced content.

make sure your GPU queues are at least at 8.

[mzso]

video mode deinterlancing is DXVA deinterlancing.
film mode deinterlancing is a field match algorithm that can do more you will get combing with it if you run it on true interlanced content.

make sure your GPU queues are at least at 8.

I get quite severe combing with forced video mode. Meanwhile with LAV's HW deinterlacer I see none. Is it that much superior?

[huhn]

it should be the same can you make a screen of the OSD?

[AbbeKoenig]

This is my setup:

Asus GL702VM (nVidia GTX1060, 75Hz G-Sync), latest stable builds of MPC-HC, madVR, LAV filters and assFilterMod, all 64bit where available.

I am having a slightly funny problem of unstable display rate. I'm talking about the "display" line when one presses Control-J while playing a file.

The composition rate stays at 75.00-something Hz while the display rate fluctuates around 74.8-something Hz, but never hits 75 Hz. After a rather significant amount of time - mostly after about an hour into a movie because I don't notice this when playing 24-minute anime episodes - the display rate sharply drops to 40.00-something Hz, then slowly climbs back up to 66.3-something Hz. This all happens without any visible effects or any increase in the dropped frames/display glitches counters. Interestingly the clock deviation statistic does not seem to change along with the display rate change. I am not using ReClock.

This does not seem to happen in windowed mode, however both fullscreen exclusive and non-exclusive is plagued with this problem. In windowed mode, display rate is at a steady 75.00-something Hz and never dips below 75 Hz.

Even though there don't seem to be any visual effects related to this, I'm still rather bothered by this problem. Any help is greatly appreciated. Thank you!

[mzso]

it should be the same can you make a screen of the OSD?

Why? I already told you deinterlacing is on.
Anyway here it is:
https://abload.de/img/dei-5m2sfb.png

[huhn]

because the OSD is a powerful tool.

first of all deinterlancing is on but not used. why i don't know.
so i have to ask more things. what GPU and driver is used.

the next odd thing is the input file it is just NV12. is ffdshow or something like this min the filter list? a copy of the filter list may help.

a sample would help but i guess this is a totally normal DVB mpeg2 or h264 PAL stream right?

@AbbeKoenig
a blind guess from me try to disable g-sync if active.

[AngelGraves13]

If using LAV, set it to Aggressive so it can turn on for any interlaced video stream, instead of relying on flags.

[AbbeKoenig]

@AbbeKoenig
a blind guess from me try to disable g-sync if active.

Roger, but I thought as per https://forum.doom9.org/showthread.php?p=1271416#post1271416 , madVR doesn't use G-Sync?

[Asmodian]

Roger, but I thought as per https://forum.doom9.org/showthread.php?p=1271416#post1271416 , madVR doesn't use G-Sync?

No, G-Sync does not mix well with madVR. You need to turn it off, at least for your media player (add it to Program Settings and set Monitor Technology to Fixed Refresh, under Manage 3D Settings). G-Sync gets very confused and you get random drifting refresh rates with terrible judder as it drifts around.

[mzso]

because the OSD is a powerful tool.

first of all deinterlancing is on but not used. why i don't know.
so i have to ask more things. what GPU and driver is used.

the next odd thing is the input file it is just NV12. is ffdshow or something like this min the filter list? a copy of the filter list may help.

a sample would help but i guess this is a totally normal DVB mpeg2 or h264 PAL stream right?

A GTS450. I have LAV A/V codecs set in ProgDVB. (I see no way to control the splitter, and I can't tell what is used).

I just realized that deinterlacing does work at startup, but only as long as I don't switch to another channel.

[e-t172]

The composition rate stays at 75.00-something Hz while the display rate fluctuates around 74.8-something Hz, but never hits 75 Hz. After a rather significant amount of time - mostly after about an hour into a movie because I don't notice this when playing 24-minute anime episodes - the display rate sharply drops to 40.00-something Hz, then slowly climbs back up to 66.3-something Hz. This all happens without any visible effects or any increase in the dropped frames/display glitches counters. Interestingly the clock deviation statistic does not seem to change along with the display rate change. I am not using ReClock.

Lowering display refresh rate is a fairly common power management feature of laptop GPUs. Try to disable power management options in your GPU drivers. If you have an Optimus system (Intel + nVidia combined), you might have more luck looking into the Intel GPU driver options.

[HillieSan]

Got HDMI connection errors sometimes during movies and getting black screen video, while audio still works. Got a friend having same problems. So I put the rx480 into my gaming pc.

I experience this problem with my TV when the data rate is too high for the cable. This is why AMD added a cable check in their latest drivers. A good cable solves the problem, or stay within the bandwidth of the cable. I had same issue with my Pioneer DVD player in the past. A new cable fixed the problem. The problem starts over again with 4K via older HDMI cables. Anyway, I have no issues with my XFX RX 480.

[Siso]

make sure your GPU queues are at least at 8.

What queues would you recommend for gtx 1050ti 4gb?

[huhn]

I experience this problem with my TV when the data rate is too high for the cable. This is why AMD added a cable check in their latest drivers. A good cable solves the problem, or stay within the bandwidth of the cable. I had same issue with my Pioneer DVD player in the past. A new cable fixed the problem. The problem starts over again with 4K via older HDMI cables. Anyway, I have no issues with my XFX RX 480.

doesn't make any sense the data rate never changes.
the cable check is uesless i even talk to AMD and ask them why this check doesn't do anything and they didn't even know what this thing does. depending on the driver used you will never get the image back until you unplug it. there is something big broken.

and most important why doesn't this happen with nvidia. is there signal better so it works on older cables constantly? i'm through 5 cables and a PS4 pro sending the same type of signal using an AMD GPU with no issues.

A GTS450. I have LAV A/V codecs set in ProgDVB. (I see no way to control the splitter, and I can't tell what is used).

I just realized that deinterlacing does work at startup, but only as long as I don't switch to another channel.

sounds like a bug to me but not sure where.
you should be able to force deinterlancing with control+shift+alt+d
better than nothing i guess.

What queues would you recommend for gtx 1050ti 4gb?

defaults should be fine.

[YxP]

I'd like to revive the conversation about the noise NGU generates in GPU, at least in my 1060. This weird ticking/clicking noise? I'm not complaining or hoping for a software fix, but as a phenomenon it feels very curious. I thought it was just a power issue, but running NNEDI256 doesn't cause that sound. Did we ever find a reasonable explanation? At NGU high the sound is basically inaudible and I'll just bump up other madvr goodies to compensate :) But still, it's facinating.

[cork_OS]

I suspect NGU produce GPU load in somewhat unusual way. Like extremely throbbing load, high load of specific GPU blocks or something like that.

[mzso]

sounds like a bug to me but not sure where.
you should be able to force deinterlancing with control+shift+alt+d
better than nothing i guess.

It does no more than print out the message of deinterlacing being turned on/off and change the text on the OSD. Deinterlacing still doesn't work, no matter how many times I flip it.

[huhn]

It does no more than print out the message of deinterlacing being turned on/off and change the text on the OSD. Deinterlacing still doesn't work, no matter how many times I flip it.

if you can't force deinterlancing with the hotkey than this should be a bug in madVR.

i guess you need to ask a different progDVB user if it works for him. so nothing i can do anymore.

[HillieSan]

doesn't make any sense the data rate never changes.
the cable check is uesless i even talk to AMD and ask them why this check doesn't do anything and they didn't even know what this thing does. depending on the driver used you will never get the image back until you unplug it. there is something big broken.



12 bits, 10 bits, 8 bits, 4:4:4, 4:2:2, 4:2:0, 23hz, 24hz, 50hz, 60hz, 1080p, 2160p all give different data rates

I use 1080p, 10 bits, 4:2:0, 60hz on a 12 meters cable between AMD RX 480 and Marantz receiver. This works fine. Higher bit rate causes glitches and screen goes black for seconds.

True, the check does not improve the signal. It is added to tell you if the cable is not ok. This seems not to work. HDMI uses power steering at peers end of the cable. HDMI is sensitive to the HDMI implementation of the devices. It may happen that there is a mismatch between the devices and cable. A solution is to use a HDMI repeater. (HDMI 2.1 is bases on repeaters for long distances)

Beside a good cable, check updates of the TV. My new samsung KS7000 got an update to improve HDMI connection with some UHD players.

[Soulnight]

Hi guys,

is there any boolean value to apply a specific "profile" to hdr content with "undefined hdr"?

I created a profile with the boolean value "HDR". Problem is, I have some videos which doe have HDR but somehow with hdr flag resulting in this "HDR: undefined" instead of HDR: 4000 nits for example.
And in this case the HDR boolean value does not recognize the profile as being HDR.

@madshi: would it be possible to extend the HDR boolean value to hdr undefined?

@all: could I maybe filter with with a bollean value like "REC2020"? Or maybe H265?

Thank you!

[huhn]

12 bits, 10 bits, 8 bits, 4:4:4, 4:2:2, 4:2:0, 23hz, 24hz, 50hz, 60hz, 1080p, 2160p all give different data rates

but they stay the same every time they don't change ever.

I use 1080p, 10 bits, 4:2:0, 60hz on a 12 meters cable between AMD RX 480 and Marantz receiver. This works fine. Higher bit rate causes glitches and screen goes black for seconds.
you are send about 1/8 of the UHD bandwidth and you are already at the limited. even for 12 meter this is pretty bad and i was using 1.5-2 meter cables.
and BTW. 1080p 4:2:0 is not part of the HDMI spec.

2160p60 4:4:4 is fine with my nvidia cards.

[SweetLow]

Seems like madvr doesnt recognize the display name. I tried the name that madvr shows me under the "devices" tab in madvr settings. Is this a bug?
Yes. And madshi knows this :rolleyes:

[HillieSan]

you are send about 1/8 of the UHD bandwidth and you are already at the limited. even for 12 meter this is pretty bad and i was using 1.5-2 meter cables.
and BTW. 1080p 4:2:0 is not part of the HDMI spec.

2160p60 4:4:4 is fine with my nvidia cards.

The limit is 2160p30 4:2:0 on 12 meter. 30 Hz ís a too low frequency for Windows on the TV. With 2 meter cable 2160p60 4:4:4 works fine. Perhaps I should try a HDMI repeater and see if I can get more out of the 12 meter cable.

[jerryleungwh]

Hi I have been trying to get HDR working on my tv but with no luck. I use the passthrough option with both nvidia and win10 api, and neither one managed to send hdr signal to my tv, I suppose it's because the metadata was not sent, what could be the reason? I am using a dell inspiron 15 7000 series 7559. Also, not sure if it's related but I never got the hdr switch on the display page after the win 10 anniversary update

[huhn]

The limit is 2160p30 4:2:0 on 12 meter. 30 Hz ís a too low frequency for Windows on the TV. With 2 meter cable 2160p60 4:4:4 works fine. Perhaps I should try a HDMI repeater and see if I can get more out of the 12 meter cable.

there is no such limited on a 12 meter cable.
a 12 meter high speed cable has to be able to do the same as a 2 meter high speed cable or it is not high speed.
no need to discuss this in the madVR thread.

[sauma144]

Hello madshi,
Do you plan to add Enhanced EWA upscalers into madVR?
http://kaba.hilvi.org/homepage/cg/ewa/Enhanced_Ewa.pdf

Do you plan to add any denoiser?
I know there are a lot of forms of image noise and that creating such a good denoiser is not that easy.
I would like to toggle it easily with a keyboard shortcut.

[XMonarchY]

Hello madshi,
Do you plan to add Enhanced EWA upscalers into madVR?
http://kaba.hilvi.org/homepage/cg/ewa/Enhanced_Ewa.pdf

Do you plan to add any denoiser?
I know there are a lot of forms of image noise and that creating such a good denoiser is not that easy.
I would like to toggle it easily with a keyboard shortcut.


Looks impressive!

[huhn]

reminds me of EWA lanczos (jinc)

[HauteTension]

Hello.
I have questions to the MAdVR community.

1) How hardware-scalable is MadVR?
How much the performance of MadVR depends on the CPU?

For example, does it make any sense to change the 4-core Core i7 6500 to 8-core Core i7 6900K or 12-core i9-7920X?
Will this provide any significant increase in overall MadVR performance and will it allow using more sophisticated algorithms?
How about new AMD Risen multicore processors? Is it better or worse then i7 for MadVR?

Maybe, Is it better for MadVR to use processors with a higher clock rate, rather than a large number of cores?

2) The second question: does MadVR support video cards in SLI configurations?
That is, will it give any/or noticeable boost to MadVR performance by adding a second similar video card to the system?

3) Which test or test suite now most accurately represents the performance of CPU and GPU in relation to MadVR processing?
Is this OpenCL benchmarks or something else?

Will be grateful for the explanations and answers.

[ryrynz]

I'll have a crack at these.

1) Very, it can work a Titan if you're upscaling to 4K or beyond. Very little depends on CPU, choose whatever you want it won't matter (Quad+ cores generally preferred these days)
Ryzen is good, madVR is designed for mostly GPU work as GPU's are far more suited for these tasks so it really doesn't matter.
2) No.
3)Nothing I know of, Nvidia generally offers better performance for most features of madVR. At this point it's best just to ask providing information about content and display , maybe one day madVR has the ability to benchmark.

[sauma144]

reminds me of EWA lanczos (jinc)

It's an enhanced version of EWA upscaling, so Enhanced Jinc or Jinc++. :)

[HauteTension]

Very little depends on CPU

Thanks for answers!

1) I already have a Titan X Pascal for MadVR, which works with i7.
Typical CPU usage is 25-30% even on the heaviest algorithms.

Typical content: Remux 1080p, which upscale to 4K Screen.

Even Titan X is not enough for maximal algorithms, such as
"Chroma Upscaling NGU-Very High + Image Upscaling NGU Very High"

Even NNEDI3-256 for Chroma + NGU High for Image Upscaling is already a problem.

Therefore, I want more hardware power :)
It's a pity if my bundle of CPU and GPU is the top for MadVR for today.

2) If SLI is not supported, very sorry.
What prevents MadVR from using SLI or more-than-4-core CPU?

3) If MadVR does not much depend on the processor,
Maybe, a bundle of i3 + Titan X will provide the same performance as i7 + Titan X?
In other words, there is no point in buying a processor more expensive than i3 for MadVR?

4) That's why it would be important to have relevant tests that will show which particular increase provides more expensive hardware and
where generally reasonable CPU power limit for MadVR.

[ryrynz]

That CPU usage will actually be more the AV decoding than madVR.

"Maximal algorithms" are typically bad choices without first weighing the visual benefits..
4K is a big upscale from Full HD with things like NNEDI3 and NGU, don't underestimate the amount of work that needs to be done to do this.. scale it back, I doubt you'll notice a difference.

I've said this many times.. do not use NNEDI3 256 for chroma. I have no doubt it'll be removed in future.. It's nothing but a huge waste of resources, avoid it like the plague.

You don't really need more hardware power.. you need to look at what you're doing and weigh the benefits of an upgrade by first looking at the differences between what you can and can't do..

I think what prevents madVR from using SLI is that simply madshi has not spent any time on developing for it, there could be a limitation though..

If you're only using a PC for madVR only then a modern quad i3 is fine, personally I'd rather a Ryzen for the extra cores.

When your using a Titan there's not really much out there that's better.. I think most would say go for a 1080Ti if you wanted to upgrade further.. but like I said, weigh it up first.
You should know what you're getting before you pay for it just jumping into a Titan X or 1080Ti without knowing what it gives you is pretty silly IMO.

[huhn]

It's an enhanced version of EWA upscaling, so Enhanced Jinc or Jinc++. :)

it's not like the jinc in madVR is normal EWA lanczos.

would be an easy test with the unscaled test images used but i don't see a way to access them.

i could kind of simulate the 2x2 black white test board pattern and jinc is clearly different from EWA filtering and the new one and what it'S worth clearly superior on this pretty worthless test pattern.

i had to simulate it so it is clearly not 100% the same image.

and most important these paper are from "March 3, 2009" and if i remember correctly jinc is from 2012.

[oldpainlesskodi]

Just wanted to pop by to say finally got Kodi and HDR metadata and the HDR trigger to work!!! Phew. Turns out that if you use the latest Kodi Dsplayer 32bit version and nvidia driver 378.92 and select passthrough using the nvidi api, it works perfect. Was previously using the latest 64 bit version of kodi dsplayer, which the above doesnt work with

Thanks again Madshi for the great work.

K

Win 10 x64 (16199 build)
Asus GTX 1080 strix OC

PS- As I suspected, no go with later drivers, so 378.92 is the one the works for HDR triggers.

[Ironclad]

Thanks for answers!

1) I already have a Titan X Pascal for MadVR, which works with i7.
Typical CPU usage is 25-30% even on the heaviest algorithms.

Typical content: Remux 1080p, which upscale to 4K Screen.

Even Titan X is not enough for maximal algorithms, such as
"Chroma Upscaling NGU-Very High + Image Upscaling NGU Very High"

Even NNEDI3-256 for Chroma + NGU High for Image Upscaling is already a problem.

Therefore, I want more hardware power :)
It's a pity if my bundle of CPU and GPU is the top for MadVR for today.

2) If SLI is not supported, very sorry.
What prevents MadVR from using SLI or more-than-4-core CPU?

3) If MadVR does not much depend on the processor,
Maybe, a bundle of i3 + Titan X will provide the same performance as i7 + Titan X?
In other words, there is no point in buying a processor more expensive than i3 for MadVR?

4) That's why it would be important to have relevant tests that will show which particular increase provides more expensive hardware and
where generally reasonable CPU power limit for MadVR.

MadVR has many possible configurations but not all of them are practical. The higher strength upscaler settings have diminishing returns, and I never use the max settings. If you're using NNEDI3 or NGU highly doubt you'll even notice a difference if you bring them down to medium strength. On a GTX 1080, I'm using NGU chroma doubling & quadrupling with frame interpolation to 90 fps and only getting like 70% usage. I would recommend looking up some guides on what most people find are resource efficient configurations. It's subjective of course, but I think it will give you a jumping off point to configure what you find most pleasing.

[johnnylaiyee]

Just wanted to pop by to say finally got Kodi and HDR metadata and the HDR trigger to work!!! Phew. Turns out that if you use the latest Kodi Dsplayer 32bit version and nvidia driver 378.92 and select passthrough using the nvidi api, it works perfect. Was previously using the latest 64 bit version of kodi dsplayer, which the above doesnt work with

Thanks again Madshi for the great work.

K

Win 10 x64 (16199 build)
Asus GTX 1080 strix OC

PS- As I suspected, no go with later drivers, so 378.92 is the one the works for HDR triggers.

Same as me, Jriver trigger HDR automatically buy MPC-BE x64 didnt

[cyber201]

Just wanted to pop by to say finally got Kodi and HDR metadata and the HDR trigger to work!!! Phew. Turns out that if you use the latest Kodi Dsplayer 32bit version and nvidia driver 378.92 and select passthrough using the nvidi api, it works perfect. Was previously using the latest 64 bit version of kodi dsplayer, which the above doesnt work with

Thanks again Madshi for the great work.

K

Win 10 x64 (16199 build)
Asus GTX 1080 strix OC

PS- As I suspected, no go with later drivers, so 378.92 is the one the works for HDR triggers.


Oh, very good news.
You can try with a Windows 10 CU and the latest nvidia drivers?
Because with kodi DSPlayer 64bit + Windows 10 CU + latest nvidia drivers, don't works.
I need to turn ON manually the HDR slide in windows 10 and then play a HDR film.
But, if I turn OFF HDR slide in windows 10, my TV don't switch automatically into HDR mode.

Thanks.

[oldpainlesskodi]

Oh, very good news.
You can try with a Windows 10 CU and the latest nvidia drivers?
Because with kodi DSPlayer 64bit + Windows 10 CU + latest nvidia drivers, don't works.
I need to turn ON manually the HDR slide in windows 10 and then play a HDR film.
But, if I turn OFF HDR slide in windows 10, my TV don't switch automatically into HDR mode.

Thanks.

As I said, you need the latest 32bit Kodi dsplayer and nvidia driver 378.92.

K

[Igorth]

Check the banding folks, I can make kodi dsplayer trigger HDR with 378.92 drivers but something is wrong with the output, it can pass unnoticed but with some blue skyes (Allies movie beginning or Planet Earth II intro) there is banding, I can see the steps pretty clearly (I don't if I play the same files in the TV).

If I enable the windows control panel HDR slider and then play the file everything works OK with no banding thou, don't know why.

It crashes almost everytime if I don't reboot the system first, everything is very fragile at this moment with HDR..

[dbgnu76]

Just wanted to pop by to say finally got Kodi and HDR metadata and the HDR trigger to work!!! Phew. Turns out that if you use the latest Kodi Dsplayer 32bit version and nvidia driver 378.92 and select passthrough using the nvidi api, it works perfect. Was previously using the latest 64 bit version of kodi dsplayer, which the above doesnt work with

Thanks again Madshi for the great work.

K

Win 10 x64 (16199 build)
Asus GTX 1080 strix OC

PS- As I suspected, no go with later drivers, so 378.92 is the one the works for HDR triggers.


I can confirm that Nvidia 378.78 also partly works with Kodi Dsplayer 32bit , My LG 70UH700 will go into HDR mode :) but when i have watched or press stop to go menu,it won`t exit HDR mode, so all colors are washed out. i must restart computer to end HDR. i cannot install 378.92 because got errors on that driver.

[Siso]

I can confirm that Nvidia 378.78 also partly works with Kodi Dsplayer 32bit , My LG 70UH700 will go into HDR mode :) but when i have watched or press stop to go menu,it won`t exit HDR mode, so all colors are washed out. i must restart computer to end HDR. i cannot install 378.92 because got errors on that driver.

Use DDU to uninstall previous drivers.

[dbgnu76]

Use DDU to uninstall previous drivers.

i have tryed many things ,also re-installed whole windows.
i won`t work with my EVGA GTX1070 , all the other drivers
works like a charm.

[jerryleungwh]

Oh, very good news.
You can try with a Windows 10 CU and the latest nvidia drivers?
Because with kodi DSPlayer 64bit + Windows 10 CU + latest nvidia drivers, don't works.
I need to turn ON manually the HDR slide in windows 10 and then play a HDR film.
But, if I turn OFF HDR slide in windows 10, my TV don't switch automatically into HDR mode.

Thanks.
I have win 10 CU installed but I haven't been able to turn on HDR in the display menu, I suspect it's because the driver for my gpu is not updated yet, is there no way for me to use HDR yet? I can't update it because it came with the laptop so I gotta wait til the manufacturer gets it updated

[cyber201]

ok, now works
Kodi DSPlayer latest version 32bit, madvr latest version and nVidia driver 378.92 and windows 10 CU.
But I have the same problem of dbgnu76.
When I press STOP, the display remain in HDR mode.
Why?
Any other experience?

p.s.
With the latest driver of nvidia, HDR don't works