Maybe it's worth trying to do a test build with pipewire to see if there's any improvement.
Posts by smp
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For those who only use the satellite tuner I modded the driver to disable the DVB-T/C tuner.
TBS 5520SE has 2 tuners attached to a single demod. DVB core apparently does not support 2 tuners on 1 demod so the driver used a hacky way to split the adapter in 2 virtual frontends. This cause all sorts of issues with tvheadend (e.g. "no free adapter available"). I modded the driver so si2157 DVB-T tuner is not attached and only 1 DVB-S frontend is created.
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I've seen a similar issue on a Samsung TV. Usually, when a HDMI source device is powered down - the TV still detects that something is plugged in to the HDMI port. But some devices stop being detected when powered down, on the next boot TV "thinks" that a new device has been connected and some HDMI-related settings reset to defaults. As a workaround, you can try to connect the Pi to TV via a self-powered HDMI splitter/switch/extender.
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but no issue when play recorder
I think this has something to do with how the realtime streams are handled by Kodi.
Could you try to play via pvr addon with this build? - LibreELEC-Generic.x86_64-12.0-devel-20231208072228-5b2d3ec.img.gz
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Most of 4K60 HDR videos are encoded without MaxFALL/MaxCLL metadata. Also HLG DVB streams don't use HDR metadata by design. Current HDR implementation in Kodi checks for the presence of metadata and if there is none or if it is "incomplete" - HDR passthrough is disabled. IMO this behaviour is incorrect, so I PR'ed this fix.
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What hardware? Intel driver defaults to RGB 12-bit for all modes up to 4K/30Hz. For 4K 50/60Hz it would output RGB 8-bit or YCbCr 4:2:0 8-bit, depending on display's EDID.
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Why do you enable DRM PRIME? It should not be enabled on Generic as it was never properly implemented for this platform.
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The one I tried is :
LibreELEC-Generic.x86_64-11.0.3.img
Also try a
LibreELEC-Generic.x86_64-10.0.4.img
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Code
2023-11-15 20:01:43.526 T:920 debug <general>: Output Device : Default (HDA Intel PCH ALC897 Analog)Switch to another audio output device.
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when i play 4k material it only shows the top left corner of the video
Is there anything like this in kodi.log when that happen?
ERROR <general>: CDRMAtomic::DrmAtomicCommit - test commit failed: (Invalid argument) - falling back to last successful atomic request
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when I changed channels it flickers repeatedly until it change
This is a known Kodi issue.
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linux: enable MGLRU in config options by smp79 · Pull Request #8275 · LibreELEC/LibreELEC.tvhttps://raw.githubusercontent.com/torvalds/linux/master/Documentation/admin-guide/mm/multigen_lru.rst Runtime tested on Generic, doesn't seem to break anything.github.com
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I didn't PR a Nexus backport, Kodi 21 should be out soon. I'm not even sure if there's going to be Kodi 20.3. You can keep using my LE11 image until LE12 is out.
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Did you find a bug?
Yes, I PR'ed the fix to Kodi.
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