I thought of starting to use Kodi again after probably a decade or so.
I setup a USFF Lenovo PC with a i5 9500T and a Quadro P620 card to the task with the intent of 4K HDR and (sometimes) SDR playback
However have been facing some odd issues with this setup
HDR and SDR playback:
With frame rate matching on, HDR playback works great.
Windows display settings HDR is set to off and the display switches to HDR once playback starts. 24hz videos playback at the native framerate as expected
However with this setup SDR playback has highly elevated Blacks (i.e. Blacks look gray)
Once playback starts (for a SDR file), the initial black screen first turns gray and then subsequent playback has wrong black levels
The same file plays with the correct black levels on other apps like VLC
If i turn off frame rate matching, this problem disappears (i.e. SDR playback is normal)
but in this case, HDR switching does not work (i.e. HDR file plays with the display staying in SDR and renders wrong colors)
Frame skipping
Kodi 19 has flawless playback
Kodi 20 and 21 skip 4-5 frames (as confirmed by the playback HUD) every few seconds
I eventually ended up installing 19 and then did a portable install for Kodi 21 and surprisingly the portable install worked fine with no frame skipping
This is currently resolved with this workaround but am curious why this should be the case
Log attached with two file playbacks.. One HDR (which worked fine) followed by SDR (with raised black levels)
https://paste.kodi.tv/obiwahuxeg.kodi