There are multiple post scattered among the release threads about these issues, but I haven't found any solution that works for me yet. So here's a seperate threads where people will hopefully post solutions to these issues.
The list of issues I've encountered myself so far:
- Picture quality in 4k is worse than 1080p, this is easy to spot when switching the UI to 4k and looking at the clock in the top right corner; 1080p has crisp numbers, 4k has smudged numbers. This happens on both s905 (AVR says it's doing 4k50/yuv420) and s905x (AVR says it's doing 4k50/yuv444). The suggested solution of switching to RGB mode using sysfs doesn't seem to work, same smudgy clock. In fullscreen video this smudging affects things like the BBC logo.
- Screenshots made in 4k mode are corrupted and show a different buffer e.g. end credits of the previous 1080p video.
- H265/HDR gives horrible banding on s905x. The TV does show the 'HDR' popup.
- VP9.2/HDR doesn't make the TV show the 'HDR' popup. Only tested with one sample by pointing youtube-dl to a hdr clip.
I'm also curious about workarounds, I wouldn't mind having a knob to disable HDR in kodi or a knob to disable switching to 4k. If people want to test I can provide a 1 minutes/100MiB clip of h265/hdr footage, contact me via PM for that.
At the time of writing, these bugs show up with 8.0.1h.
