CE on Ugoos AM6B+ & AM9 Pro crashes on attempted playback of Dolby Vision 8.4 HLG base layer 4K60 MP4

My Ugoos AM9 Pro running the official CoreELEC-Amlogic-no.aarch64-22.0-Piers_nightly_20260719-Genericbuild crashes when I attempt to play this file (can PM link for testing) with the following MediaInfo properties:

Summary

Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42 (isom/mp41/mp42)
File size : 3.91 GiB
Duration : 12 min 49 s
Overall bit rate : 43.7 Mb/s
Frame rate : 60.000 FPS
Keywords : 2026-07-02,orange
Encoded date : 2026-07-06 21:44:34 UTC
Tagged date : 2026-07-06 21:59:51 UTC

Video
ID : 2
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L5.1@High
HDR format : Dolby Vision, Version 1.0, Profile 8.4, dvhe.08.09, BL+RPU, no metadata compression, HLG compatible
Codec ID : hvc1
Codec ID/Info : High Efficiency Video Coding
Duration : 12 min 49 s
Bit rate : 43.5 Mb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 60.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 10 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.088
Stream size : 3.90 GiB (100%)
Encoded date : 2026-07-06 21:44:34 UTC
Tagged date : 2026-07-06 21:59:51 UTC
Color range : Limited
Color primaries : BT.2020
Transfer characteristics : HLG
Matrix coefficients : BT.2020 non-constant
AmbientViewingEnvironment_Illuminance : 15.7000 lux
AmbientViewingEnvironment_Chromaticity : D65
Codec configuration box : hvcC+dvvC

Audio
ID : 1
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 12 min 49 s
Source duration : 12 min 49 s
Bit rate mode : Constant
Bit rate : 160 kb/s
Channel(s) : 6 channels
Channel layout : C L R Ls Rs LFE
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 14.3 MiB (0%)
Source stream size : 14.3 MiB (0%)
Language : English
Encoded date : 2026-07-06 21:44:34 UTC
Tagged date : 2026-07-06 21:59:51 UTC

Image
Type : Thumbnail
Format : JPEG
Muxing mode : moov-udta-thmb
Width : 3 840 pixels
Height : 2 160 pixels
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Compression mode : Lossy
Stream size : 743 KiB (0%)

AM6B+ users have reported the crash affects them too.

A Gemini Plus analysis of the attached log files concludes it’s a hard kernel panic/reset:

When Kodi’s demuxer passes the raw dvvC configuration stream to the Amlogic video driver (amlvideo), the driver attempts to parse the RPU metadata and map it onto the HLG pipeline at 60 frames per second. The VPU encounters an unhandled register synchronization failure or a memory fence timeout, immediately forcing a hardware watchdog reset.

Any ideas? Thanks!

kodi_crash.log (8.4 MB)

kodi.old.log (252.0 KB)

kodi.log (4.4 MB)

Ask him to make a fix also. Analysis is cheap and everyone can do it.

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Haha, I was just trying to provide a hint since I have no idea :man_shrugging:

All samples are locked and only available for registration.
Provide a direct download link or nobody will help you.

@Portisch @vpeter as I don’t have the rights to the file, I can’t post it publicly. Can one of you PM me for it, as I don’t think I can PM you.

sample forwarded

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Homatics R 4K Plus with 20260719 plays this sample without issue over HTTP.

1 Like