I know still are some incompatibility example with Samsung HDR TV, which is actually issue of intel driver/
I had a chance to test my Gemini Lake box with different Samsung HDR TVs.
- UE40NU7100 (2018 model) - no signal when "HDMI UHD color" enabled
- UE43RU7090 (2019 model) - no issues
- UE43TU8000 (2020 model) - no issues
is that still 8-bit output though?
Yes.
Not an issue for me though. The panel is 8-bit with FRC. I will probably get a better result with RGB 8-bit + GPU dithering than with 4:2:0 12-bit.
This is the main "blocking" issue from my point of view, it seems to happen when mode is changed from one 4:2:0 12-bit mode to another 4:2:0 12-bit mode (and yuv plane is involved). I think LibreELEC-Generic.x86_64-9.80-devel-20200201013402-e776789.img.gz contain a limit to use 8-bit output and if I remember correctly using 4:2:0 50/60hz 8-bit works, it will activate HDR mode on my LG OLED but I am sure colors will not be optimal.
I have not been able to produce a simple reproducible test case (not using kodi) for this 4:2:0 50/60hz distorted image issue.
That was actually an issue with my older Samsung TV.
I just tested with another TV (Samsung UE43TU8000) and 4K 60Hz HDR videos play just fine, no video distortion.
Get a proper cooling for Pi4. Like a Flirc case or something like that.
all they do is establish the current driver is for the A variant and add firmware for the B variant.
[net-next,2/2] r8169: add support for RTL8125B - Patchwork
^ I don't think that's all they do.
should i be ok setting RGB Full? Or should i go with YCbCr limited/full
RGB full is usually used for PC monitors. Use YCbCr limited.
Could this be a firmware issue with the TV?
I suppose so.
Maybe your TV does not like RGB @4K 24Hz. Try to test with hdmi_pixel_encoding=3 in config.txt.
I built an image with included RTL8125B kernel patches and firmware.
Can you save the EDID to a file and post it here?
tvservice -d edid.dat
Isn't Le Potato supposed to be the "flagship hardware platform" of libre?
Libre Computer Project has nothing to do LibreELEC.
LE 9.0.2 has a major bug on Le Potato (segfault on file transfer), it is basically broken. The fix never made it to LE 9.0.2.
The best images for Le Potato for now are CE nightlies (Amlogic-ng).
Regarding your freezing issue - looks more like a hardware problem.
with the newest LE version
Try the latest nightly/Milhouse build. If there were an issue with the stable build, it's more than likely been resolved.
Try different hdmi_pixel_encoding= settings in config.txt.
| 0 | default (RGB limited for CEA, RGB full for DMT) |
| 1 | RGB limited (16-235) |
| 2 | RGB full (0-255) |
| 3 | YCbCr limited (16-235) |
| 4 | YCbCr full (0-255) |
I've heard people going on about HDR for years, but I've never quite understood what the big deal was.
The big deal is that ~90% of the 4K UHD stuff you find on the internet is HDR. So if you have a 4K HDR capable TV you'd want your LE device to be able to pass through the HDR metadata.
If Nvidia support is coming back with this driver, maybe the userbase will come back too?
Not gonna happen. "Userbase" wants HDR which will only work with Kodi-GBM. Nvidia does not support GBM.
No. Too much stuff to backport.
Intel are now EOL'ing Gemini Lake
Intel just released Gemini Lake Refresh SoCs (J5040, J4115...).
