https://bugs.kde.org/show_bug.cgi?id=496991

--- Comment #5 from Akhil K <akhilkalwakur...@gmail.com> ---
Created attachment 176703
  --> https://bugs.kde.org/attachment.cgi?id=176703&action=edit
drm_info complete output

(In reply to Zamundaaa from comment #3)
> hmm, that's weird. If you reduce the SDR brightness to something more normal
> (like 500 or 600 nits), does it get even dimmer, or does the display somehow
> compensate for the average brightness level?

I gets dimmer. SDR brightness range for me is 50 - 1261 nits. I tried in
increments of 100 and I can see the brightness change

(In reply to Zamundaaa from comment #4)
> Also, please attach the output of drm_info when HDR is enabled, I wonder
> what HDR metadata we're sending the screen

Here is the HDR metadata section from drm_info:
│   │       ├───"HDR_OUTPUT_METADATA": blob = 288
│   │       │   ├───Type: Static Metadata Type 1
│   │       │   ├───EOTF: SMPTE ST 2084 (PQ)
│   │       │   ├───Display primaries:
│   │       │   │   ├───Red: (0.6816, 0.3164)
│   │       │   │   ├───Green: (0.2627, 0.6895)
│   │       │   │   └───Blue: (0.1426, 0.0488)
│   │       │   ├───White point: (0.3115, 0.3408)
│   │       │   ├───Max display mastering luminance: 604 cd/m²
│   │       │   ├───Min display mastering luminance: 0.0496 cd/m²
│   │       │   ├───Max content light level: 604 cd/m²
│   │       │   └───Max frame average light level: 604 cd/m²
│   │       └───"vrr_capable" (immutable): range [0, 1] = 1

Added the complete output of drm_info as an attachment. Not sure but, shouldn't
Max display mastering luminance be 1261?

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