HDR Tone Mapping with HW Transcoding not working for 12900K CPU on PMS Version 1.32.5.7210

Plex Media Server NAS & Devices
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Let me recap recent history for you:

  1. 1.31.3.6868 - worked for (I think?) everyone.
  2. 1.32.0.xxxx - Intel Media Driver upgraded to current release
    – Major breakage across all the platforms
  3. 1.32.5.7210 - Fixed ApolloLake processors , Added AMD GPU support (SDR)
  4. 1.32.5.7349 - Hotfix for something else in PMS – works on our RaptorLake
  5. – work in flight for the next PMS release –
  6. – Staffing changes –

Now we’re at the point of figuring out, by looking at the code changes, what was being done. We have no notes, no plans, no in-code comments. (It’s rough)

We still have to fix known

  1. End of subtitles forces stopping playback.
    – Empty subtitles track fails (related)
  2. Gemini Lake CPUs still have no HW transcoding. (no work had been done after IMD update)

Now add on to this the new 6.2 kernel and the i915 / Iris/XE changes (GUC / HUC) which are needed to support this.

Can we “unwind” ? Sure, but not without angering a whole bunch of people.

We lost a lot of institutional knowledge which is hard to replace in only a few weeks time.

Recovering from this is sufficiently important that I’m tasked with transcoder development duties.

I still have HW transcoding on my older NUC with the new unraid kernel so there is that to use as a base

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