Hope this will help
Necroposting is usually not very helpful.
Posts by smp
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So do Intel just support 4:2:0, 4:4:4 and RGB output?
Yes.
If so then 4:2:0 is the only format that will support 2160p50/60 with >8-bit for HDR
Yes. but the driver default to RGB 8-bit. A driver hack is required in order to switch to 2160p50/60 4:2:0 12-bit.
AMD behave a bit different - no 4:2:2 support either but the driver default to 4:2:0 12-bit for 2160p50/60 modes.
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The changes between 9.2.0 and 9.2.2 are kinda minor, kernel is the same (5.1.16). It doesn't seem likely that 9.2.1/9.2.2 would introduce those kind of issues.
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I never has this issue before the latest update,
What is the last version of LE that does not have this issue?
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Since this thread mainly focusses on older kernels I thought it was already out of the window @4.19.36.
Yes, that issue that was introduced in kernel 4.9 was fixed a long time ago.
In my experience Pi3 can barely handle 1 USB tuner, so I'm not surprised that Pi2 can't handle 2. I'm not sure this is fixable by software.
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I still suffer from this when I enable both my USB tuners
Did it work without errors with older kernels (< 4.9)?
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That's not correct, if by Deep Color you mean >8-bit bit depth. In fact it's quite the opposite.
I thought that was clarified back in February, not sure why you have to bring that up again.
4:2:2 is the only >8 bit format supported for all 2160p frame rates
4:2:2 is also irrelevant for any Intel hardware, not supported by the driver.
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This is not configurable from userspace. If the display's EDID report YCbCr 4:4:4 support - AMD driver will use that instead of RGB. If for whatever reason you want to force RGB then make changes to the AMDGPU source code or use a custom EDID.
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I didn't do anything to the audio part, ALSA works fine on my Gemini Lake box. Maybe it has something to do with this.
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Hm ok, I might test but my NUC7i5BNK is Gen7, no? Still worth a try even Intel mentions only Gen9?
GPU generation is what's important here. Kaby Lake = Gen9 GPU.
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I would be happy to help testing too but I have NUC7i5BNK which is Kaby Lake as far as I know. So this won't work, right?
The image include linux patches for Intel which are supposed to "Enable HDR on Gen9 devices with lspcon hdr capability". So it's worth trying on Kaby Lake.
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is this a LibreELEC generic build with 4k HDR in development??
Yes. But so far HDR only worked on Intel Gemini Lake, although with some issues.
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I compiled another image which include a series of patches for HDR on LSPCON. I don't have any devices with LSPCON so no idea if this will work. If anyone wanna try it don't forget to enable "Allow hardware acceleration - PRIME" in Settings-->Player.
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What can I do?
Buy a playback device that support 4K.
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It needs a newer kernel. Use Milhouse nightlies.
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replace Kodi Matrix (which would be perfectly fine if it wasn't for this Python dependency error which makes it virtually impossible to install any addon on it why it's disqualified for now) with Leia from the 9.2.2 head
I suspect that it would be much easier to make changes to a Python2 addon so it would be compatible with Kodi Matrix/Python3.
I actually did that with Keymap Editor addon which didn't work with Kodi Matrix.
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Do you use usb dvb tuner?
Yes. Prof 7500.
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Since LE 9 this also happens on X86 systems. If you Copy a File while watching live TV or a recording it will sometimes stutter or even stops for a Second.
I can't reproduce this on my Intel J4105 box. Tried to copy large files over LAN and record while watching live TV. No issues.
