- Windows says it is sending a 10 bit HDR signal to a monitor reporting a peak brightness of 1566 (which is correct, HDR1400 certified with an advertised peak of ~1600) https://i.imgur.com/WatJ6gP.jpg
- Windowed applications that support HDR (e.g. Krita or Chrome or MPC-BE w/ madvr) are detecting the display as linear HDR and using FP16 backing. Note on this display the SDR brightness was manually adjusted via the slider in Windows to be near 500 https://i.imgur.com/dD8HvfC.jpeg
- YouTube detects and defaults to serving the HDR versions of content, in this test case smpte2084/rec.2020 https://i.imgur.com/HI2fPKr.png
- The peak brightness I actually see in the HDR brightness test video is bang on the ~1500 nit mark I'd expect for a small brightness window (this image was taken with parameters to match almost exactly what I see in real life in terms of visibility on the brighter test cells https://i.imgur.com/z4nW5on.jpeg)
When HDR first landed with Windows in 2018 I remember it was a crapshoot of driver/windows build as to whether the transfer function was correct and there was a longstanding bug where if a video was particularly bright for too long all HDR content would look like a god awful tie-die until you bounced the display. Since ~late 2019 I haven't seen either of those and I've added a few more HDR monitors, quite literally just plug it in, enable hdr, make sure the monitor went into HDR mode, adjust SDR brightness, and off to the races. Ironically when I got an Xbox Series X about this time 2020 it took a few TV firmware updates to a Q900R before HDR started working properly with very similar kinds of issues as when Windows first got HDR.
I just got a 16" M1 Max with an HDR screen. There it seems to work out of the box (with Safari at least) but I had to tell YouTube a fake Windows Chrome user agent to get it to serve HDR content. I've heard there have been some kernel crashing issues with HDR on it but other than loading up a quick YouTube test to see how the screen was (great!) I haven't really messed with HDR on it. I do recommend disabling TrueTone and auto brightness, in particular TrueTone's effects are really amplified on HDR content and can ruin it completely depending on the room you are in.
If you ever want a cool demo to show off your setup Krita in HDR mode allows you to paint the absolute extremes of brightness and color gamut in large swatches. It can make for quite the effect when comparing it to a good calibrated sRGB SDR monitor.
- Monitor says it is receiving a 10 bit HDR-ST2084 signal https://i.imgur.com/IFa5Y1e.jpg
- Windows says it is sending a 10 bit HDR signal to a monitor reporting a peak brightness of 1566 (which is correct, HDR1400 certified with an advertised peak of ~1600) https://i.imgur.com/WatJ6gP.jpg
- Windowed applications that support HDR (e.g. Krita or Chrome or MPC-BE w/ madvr) are detecting the display as linear HDR and using FP16 backing. Note on this display the SDR brightness was manually adjusted via the slider in Windows to be near 500 https://i.imgur.com/dD8HvfC.jpeg
- YouTube detects and defaults to serving the HDR versions of content, in this test case smpte2084/rec.2020 https://i.imgur.com/HI2fPKr.png
- The peak brightness I actually see in the HDR brightness test video is bang on the ~1500 nit mark I'd expect for a small brightness window (this image was taken with parameters to match almost exactly what I see in real life in terms of visibility on the brighter test cells https://i.imgur.com/z4nW5on.jpeg)
- P3 images with content in the extended range stand out perfectly clear https://raw.githubusercontent.com/codelogic/wide-gamut-tests...
When HDR first landed with Windows in 2018 I remember it was a crapshoot of driver/windows build as to whether the transfer function was correct and there was a longstanding bug where if a video was particularly bright for too long all HDR content would look like a god awful tie-die until you bounced the display. Since ~late 2019 I haven't seen either of those and I've added a few more HDR monitors, quite literally just plug it in, enable hdr, make sure the monitor went into HDR mode, adjust SDR brightness, and off to the races. Ironically when I got an Xbox Series X about this time 2020 it took a few TV firmware updates to a Q900R before HDR started working properly with very similar kinds of issues as when Windows first got HDR.
I just got a 16" M1 Max with an HDR screen. There it seems to work out of the box (with Safari at least) but I had to tell YouTube a fake Windows Chrome user agent to get it to serve HDR content. I've heard there have been some kernel crashing issues with HDR on it but other than loading up a quick YouTube test to see how the screen was (great!) I haven't really messed with HDR on it. I do recommend disabling TrueTone and auto brightness, in particular TrueTone's effects are really amplified on HDR content and can ruin it completely depending on the room you are in.
If you ever want a cool demo to show off your setup Krita in HDR mode allows you to paint the absolute extremes of brightness and color gamut in large swatches. It can make for quite the effect when comparing it to a good calibrated sRGB SDR monitor.