HD Audio from DisplayPort - no sound (HDMI works)

fezster · January 16, 2024 at 11:37 AM

Related thread: Force display output to DP with audio on HDMI where I am trying to use the HDMI for sound and DP for video.

I wanted to dig deeper into why the DP 1.2 on my Optiplex 3050 is not able to play HD audio. I've made some progress (I think!) but I'm stuck on where to go from here. If it is a limitation of the DP itself, I'd like to understand why.

Here's my findings:

HD Audio (TrueHD and DTS HD MA) from HDMI 1.4 works - log here:

Code

2024-01-16 09:50:27.356 T:1178    debug <general>: CActiveAE - display reset event
2024-01-16 09:50:27.356 T:1179     info <general>: CActiveAESink::OpenSink - initialize sink
2024-01-16 09:50:27.356 T:1179    debug <general>: CActiveAESink::OpenSink - trying to open device ALSA:hdmi:CARD=PCH,DEV=0
2024-01-16 09:50:27.356 T:1179     info <general>: CAESinkALSA::Initialize - Attempting to open device "hdmi:CARD=PCH,DEV=0"
2024-01-16 09:50:27.358 T:1179     info <general>: CAESinkALSA::Initialize - Opened device "hdmi:CARD=PCH,DEV=0,AES0=0x04,AES1=0x82,AES2=0x00,AES3=0x00"
2024-01-16 09:50:27.358 T:1179     info <general>: CAESinkALSA::InitializeHW - Your hardware does not support AE_FMT_FLOAT, trying other formats
2024-01-16 09:50:27.358 T:1179     info <general>: CAESinkALSA::InitializeHW - Using data format AE_FMT_S32NE
2024-01-16 09:50:27.358 T:1179    debug <general>: CAESinkALSA::InitializeHW - Request: periodSize 2205, bufferSize 8820
2024-01-16 09:50:27.360 T:1179    debug <general>: CAESinkALSA::InitializeHW - Got: periodSize 2205, bufferSize 8820
2024-01-16 09:50:27.360 T:1179    debug <general>: CAESinkALSA::InitializeHW - Setting timeout to 200 ms
2024-01-16 09:50:27.362 T:1179    debug <general>: CAESinkALSA::GetChannelLayout - Input Channel Count: 2 Output Channel Count: 2
2024-01-16 09:50:27.362 T:1179    debug <general>: CAESinkALSA::GetChannelLayout - Requested Layout: FL, FR
2024-01-16 09:50:27.362 T:1179    debug <general>: CAESinkALSA::GetChannelLayout - Got Layout: FL, FR (ALSA: FL FR)
2024-01-16 09:50:27.362 T:1179    debug <general>: CActiveAESink::OpenSink - ALSA Initialized:
2024-01-16 09:50:27.362 T:1179    debug <general>:   Output Device : HDA Intel PCH
2024-01-16 09:50:27.362 T:1179    debug <general>:   Sample Rate   : 44100
2024-01-16 09:50:27.362 T:1179    debug <general>:   Sample Format : AE_FMT_S32NE
2024-01-16 09:50:27.362 T:1179    debug <general>:   Channel Count : 2
2024-01-16 09:50:27.362 T:1179    debug <general>:   Channel Layout: FL, FR
2024-01-16 09:50:27.362 T:1179    debug <general>:   Frames        : 2205
2024-01-16 09:50:27.362 T:1179    debug <general>:   Frame Size    : 8
2024-01-16 09:50:27.362 T:1178    debug <general>: CActiveAE::ClearDiscardedBuffers - buffer pool deleted
2024-01-16 09:50:27.390 T:1237    debug <general>: CVideoPlayer::HandleMessages - player 2 reported state: 0
2024-01-16 09:50:27.391 T:1237    debug <general>: CVideoPlayer::HandleMessages - player 1 reported state: 0
2024-01-16 09:50:27.391 T:1182    debug <general>: OnAVChange: CApplication::OnAVChange
2024-01-16 09:50:27.391 T:1237    debug <general>: CVideoPlayer::SetCaching - caching state 1
2024-01-16 09:50:27.391 T:1240    debug <general>: CVideoPlayerVideo - Stillframe left, switching to normal playback
2024-01-16 09:50:27.391 T:1237    debug <general>: CDVDClock::SetSpeedAdjust - adjusted:0.000000
2024-01-16 09:50:27.391 T:1237    debug <general>: CVideoPlayer::SetCaching - caching state 2
2024-01-16 09:50:27.391 T:1237    debug <general>: CDVDClock::SetSpeedAdjust - adjusted:0.000000
2024-01-16 09:50:27.393 T:1237    debug <general>: CVideoPlayer::CheckContinuity - wrapback :2, prev:209000.000000, curr:0.000000, diff:-209000.000000
2024-01-16 09:50:27.393 T:1240    debug <general>: libva info: VA-API version 1.17.0
2024-01-16 09:50:27.393 T:1240    debug <general>: libva info: Trying to open /usr/lib/dri/iHD_drv_video.so
2024-01-16 09:50:27.393 T:1240    debug <general>: libva info: Found init function __vaDriverInit_1_17
2024-01-16 09:50:27.396 T:1240    debug <general>: libva info: va_openDriver() returns 0
2024-01-16 09:50:27.396 T:1241    debug <general>: CDVDAudio::Pause - pausing audio stream
2024-01-16 09:50:27.396 T:1242    debug <general>: Thread Vaapi-Output start, auto delete: false
2024-01-16 09:50:27.396 T:1241    debug <general>: CDVDAudio::Pause - pausing audio stream
2024-01-16 09:50:27.396 T:1242     info <general>: COutput::OnStartup: Output Thread created
2024-01-16 09:50:27.396 T:1241     info <general>: CAEStreamParser::SyncTrueHD - TrueHD stream detected (6 channels, 48000Hz)
2024-01-16 09:50:27.397 T:1241     info <general>: CVideoPlayerAudio: display reset occurred, checking for passthrough
2024-01-16 09:50:27.397 T:1241    debug <general>: CDVDAudioCodecPassthrough::Open - passthrough output device is IEC
2024-01-16 09:50:27.397 T:1241     info <general>: Creating audio stream (codec id: 86060, channels: 6, sample rate: 48000, pass-through)
2024-01-16 09:50:27.397 T:1241    debug <general>: CVideoPlayerAudio:: synctype set to 0: clock feedback

<SNIP>

2024-01-16 09:50:27.615 T:1179    debug <general>: CActiveAESink::OpenSink - trying to open device ALSA:hdmi:CARD=PCH,DEV=0
2024-01-16 09:50:27.615 T:1179     info <general>: CAESinkALSA::Initialize - Attempting to open device "hdmi:CARD=PCH,DEV=0"
2024-01-16 09:50:27.621 T:1179     info <general>: CAESinkALSA::Initialize - Opened device "hdmi:CARD=PCH,DEV=0,AES0=0x06,AES1=0x82,AES2=0x00,AES3=0x09"
2024-01-16 09:50:27.622 T:1179    debug <general>: CAESinkALSA::InitializeHW - Request: periodSize 9600, bufferSize 38400
2024-01-16 09:50:27.634 T:1179    debug <general>: CAESinkALSA::InitializeHW - Got: periodSize 9600, bufferSize 38400
2024-01-16 09:50:27.634 T:1179    debug <general>: CAESinkALSA::InitializeHW - Setting timeout to 200 ms
2024-01-16 09:50:27.636 T:1179    debug <general>: CAESinkALSA::GetChannelLayout - Input Channel Count: 8 Output Channel Count: 8
2024-01-16 09:50:27.636 T:1179    debug <general>: CAESinkALSA::GetChannelLayout - Requested Layout: RAW, RAW, RAW, RAW, RAW, RAW, RAW, RAW
2024-01-16 09:50:27.636 T:1179    debug <general>: CAESinkALSA::GetChannelLayout - Got Layout: RAW, RAW, RAW, RAW, RAW, RAW, RAW, RAW (ALSA: none)
2024-01-16 09:50:27.636 T:1179    debug <general>: CActiveAESink::OpenSink - ALSA Initialized:
2024-01-16 09:50:27.636 T:1179    debug <general>:   Output Device : HDA Intel PCH
2024-01-16 09:50:27.636 T:1179    debug <general>:   Sample Rate   : 192000
2024-01-16 09:50:27.636 T:1179    debug <general>:   Sample Format : AE_FMT_S16NE
2024-01-16 09:50:27.636 T:1179    debug <general>:   Channel Count : 8
2024-01-16 09:50:27.636 T:1179    debug <general>:   Channel Layout: RAW, RAW, RAW, RAW, RAW, RAW, RAW, RAW
2024-01-16 09:50:27.636 T:1179    debug <general>:   Frames        : 9600
2024-01-16 09:50:27.636 T:1179    debug <general>:   Frame Size    : 16
2024-01-16 09:50:27.654 T:1178    debug <general>: CActiveAE::ClearDiscardedBuffers - buffer pool deleted
2024-01-16 09:50:27.659 T:1237     info <general>: Skipped 1 duplicate messages..
2024-01-16 09:50:27.658 T:1237    debug <general>: CVideoPlayer::HandleMessages - player started 1
2024-01-16 09:50:27.659 T:1237    debug <general>: CVideoPlayer::SetCaching - caching state 3
2024-01-16 09:50:27.659 T:1190    debug <general>: OnAVChange: CApplication::OnAVChange
2024-01-16 09:50:27.659 T:1237    debug <general>: CDVDClock::SetSpeedAdjust - adjusted:0.000000
2024-01-16 09:50:27.659 T:1237    debug <general>: CVideoPlayer::SetCaching - caching state 0
2024-01-16 09:50:27.659 T:1237    debug <general>: CDVDClock::SetSpeedAdjust - adjusted:0.000000
2024-01-16 09:50:27.659 T:1237    debug <general>: VideoPlayer::Sync - Audio - pts: 149000.000000, cache: 508815.933514, totalcache: 800000.011921
2024-01-16 09:50:27.659 T:1237    debug <general>: VideoPlayer::Sync - Video - pts: 0.000000, cache: 50000.000000, totalcache: 100000.000000
2024-01-16 09:50:27.659 T:1190    debug <general>: OnAVStarted: CApplication::OnAVStarted
2024-01-16 09:50:27.660 T:1240    debug <general>: CVideoPlayerVideo - CDVDMsg::GENERAL_RESYNC(-359815.933514)
2024-01-16 09:50:27.661 T:1241    debug <general>: CVideoPlayerAudio - CDVDMsg::GENERAL_RESYNC(-359815.933514), level: 99, cache: 505938.805514
2024-01-16 09:50:27.661 T:1241    debug <general>: CDVDAudio::Resume - resume audio stream
2024-01-16 09:50:27.663 T:1178    debug <general>: ActiveAE - start sync of audio stream

Display More

HD Audio (TrueHD and DTS HD MA) from DP 1.2 DOES NOT work - log here:

Code

2024-01-16 11:29:13.807 T:1410    debug <general>: CActiveAESink::OpenSink - trying to open device ALSA:hdmi:CARD=PCH,DEV=0
2024-01-16 11:29:13.807 T:1410     info <general>: CAESinkALSA::Initialize - Attempting to open device "hdmi:CARD=PCH,DEV=0"
2024-01-16 11:29:13.809 T:1588     info <general>: CAEStreamParser::SyncTrueHD - TrueHD stream detected (6 channels, 48000Hz)
2024-01-16 11:29:13.809 T:1588     info <general>: Creating audio stream (codec id: 86060, channels: 6, sample rate: 48000, pass-through)
2024-01-16 11:29:13.810 T:1584    debug <general>: OutputPicture - dropped in output
2024-01-16 11:29:13.810 T:1410     info <general>: CAESinkALSA::Initialize - Opened device "hdmi:CARD=PCH,DEV=0,AES0=0x04,AES1=0x82,AES2=0x00,AES3=0x00"
2024-01-16 11:29:13.810 T:1410     info <general>: CAESinkALSA::InitializeHW - Your hardware does not support AE_FMT_FLOAT, trying other formats
2024-01-16 11:29:13.810 T:1410     info <general>: CAESinkALSA::InitializeHW - Using data format AE_FMT_S32NE
2024-01-16 11:29:13.810 T:1410    debug <general>: CAESinkALSA::InitializeHW - Request: periodSize 2205, bufferSize 8820
2024-01-16 11:29:13.816 T:1584    debug <general>: OutputPicture - dropped in output
2024-01-16 11:29:13.819 T:1410     info <general>: Skipped 1 duplicate messages..
2024-01-16 11:29:13.819 T:1410    debug <general>: CAESinkALSA::InitializeHW - Got: periodSize 2205, bufferSize 8820
2024-01-16 11:29:13.819 T:1410    debug <general>: CAESinkALSA::InitializeHW - Setting timeout to 200 ms
2024-01-16 11:29:13.821 T:1410    debug <general>: CAESinkALSA::GetChannelLayout - Input Channel Count: 2 Output Channel Count: 2
2024-01-16 11:29:13.821 T:1410    debug <general>: CAESinkALSA::GetChannelLayout - Requested Layout: FL, FR
2024-01-16 11:29:13.821 T:1410    debug <general>: CAESinkALSA::GetChannelLayout - Got Layout: FL, FR (ALSA: FL FR)
2024-01-16 11:29:13.821 T:1410    debug <general>: CActiveAESink::OpenSink - ALSA Initialized:
2024-01-16 11:29:13.821 T:1410    debug <general>:   Output Device : HDA Intel PCH
2024-01-16 11:29:13.821 T:1410    debug <general>:   Sample Rate   : 44100
2024-01-16 11:29:13.821 T:1410    debug <general>:   Sample Format : AE_FMT_S32NE
2024-01-16 11:29:13.821 T:1410    debug <general>:   Channel Count : 2
2024-01-16 11:29:13.821 T:1410    debug <general>:   Channel Layout: FL, FR
2024-01-16 11:29:13.821 T:1410    debug <general>:   Frames        : 2205
2024-01-16 11:29:13.821 T:1410    debug <general>:   Frame Size    : 8
2024-01-16 11:29:13.821 T:1409    debug <general>: CActiveAE::ClearDiscardedBuffers - buffer pool deleted
2024-01-16 11:29:13.822 T:1588     info <general>: Skipped 1 duplicate messages..
2024-01-16 11:29:13.822 T:1588    debug <general>: CVideoPlayerAudio:: synctype set to 0: clock feedback
2024-01-16 11:29:13.822 T:1410     info <general>: CActiveAESink::OpenSink - initialize sink
2024-01-16 11:29:13.825 T:1584    debug <general>: OutputPicture - dropped in output
2024-01-16 11:29:13.841 T:1455     info <CAddonSettings[0@plugin.video.jellyfin]>: Skipped 2 duplicate messages..
2024-01-16 11:29:13.841 T:1455    debug <CAddonSettings[0@plugin.video.jellyfin]>: trying to load setting definitions from old format...
2024-01-16 11:29:13.842 T:1455    debug <CSettingsManager>: requested setting (LastIncrementalSync) was not found.
2024-01-16 11:29:13.842 T:1455    debug <CSettingsManager>: requested setting (MinimumSetup) was not found.
2024-01-16 11:29:13.842 T:1455    debug <CSettingsManager>: requested setting (MusicRescan) was not found.
2024-01-16 11:29:13.842 T:1455    debug <CSettingsManager>: requested setting (SyncInstallRunDone) was not found.
2024-01-16 11:29:13.842 T:1455    debug <CSettingsManager>: requested setting (groupedSets) was not found.
2024-01-16 11:29:13.842 T:1455    debug <CSettingsManager>: requested setting (platformDetected) was not found.
2024-01-16 11:29:13.843 T:1584    debug <general>: OutputPicture - dropped in output
2024-01-16 11:29:13.915 T:1580     info <general>: Skipped 8 duplicate messages..
2024-01-16 11:29:13.915 T:1580    debug <general>: CVideoPlayer::HandleMessages - player started 2
2024-01-16 11:29:13.915 T:1398    debug <general>: ApplyStyle - Start setting up the LibAss style
2024-01-16 11:29:13.917 T:1398    debug <general>: CDVDSubtitlesLibass: [ass] fontselect: (DejaVu Sans, 400, 0) -> DejaVuSans, 0, DejaVuSans
2024-01-16 11:29:14.023 T:1410    debug <general>: CActiveAESink::OpenSink - trying to open device ALSA:hdmi:CARD=PCH,DEV=0
2024-01-16 11:29:14.023 T:1410     info <general>: CAESinkALSA::Initialize - Attempting to open device "hdmi:CARD=PCH,DEV=0"
2024-01-16 11:29:14.026 T:1410     info <general>: CAESinkALSA::Initialize - Opened device "hdmi:CARD=PCH,DEV=0,AES0=0x06,AES1=0x82,AES2=0x00,AES3=0x09"
2024-01-16 11:29:14.026 T:1410    debug <general>: CAESinkALSA::InitializeHW - Request: periodSize 9600, bufferSize 38400
2024-01-16 11:29:14.036 T:1410    debug <general>: CAESinkALSA::InitializeHW - Got: periodSize 9600, bufferSize 38400
2024-01-16 11:29:14.036 T:1410    debug <general>: CAESinkALSA::InitializeHW - Setting timeout to 200 ms
2024-01-16 11:29:14.037 T:1410    debug <general>: CAESinkALSA::GetChannelLayout - Input Channel Count: 8 Output Channel Count: 8
2024-01-16 11:29:14.037 T:1410    debug <general>: CAESinkALSA::GetChannelLayout - Requested Layout: RAW, RAW, RAW, RAW, RAW, RAW, RAW, RAW
2024-01-16 11:29:14.037 T:1410    debug <general>: CAESinkALSA::GetChannelLayout - Got Layout: RAW, RAW, RAW, RAW, RAW, RAW, RAW, RAW (ALSA: none)
2024-01-16 11:29:14.037 T:1410    debug <general>: CActiveAESink::OpenSink - ALSA Initialized:
2024-01-16 11:29:14.037 T:1410    debug <general>:   Output Device : HDA Intel PCH
2024-01-16 11:29:14.037 T:1410    debug <general>:   Sample Rate   : 192000
2024-01-16 11:29:14.037 T:1410    debug <general>:   Sample Format : AE_FMT_S16NE
2024-01-16 11:29:14.037 T:1410    debug <general>:   Channel Count : 8
2024-01-16 11:29:14.037 T:1410    debug <general>:   Channel Layout: RAW, RAW, RAW, RAW, RAW, RAW, RAW, RAW
2024-01-16 11:29:14.037 T:1410    debug <general>:   Frames        : 9600
2024-01-16 11:29:14.037 T:1410    debug <general>:   Frame Size    : 16
2024-01-16 11:29:14.040 T:1409    debug <general>: CActiveAE::ClearDiscardedBuffers - buffer pool deleted
2024-01-16 11:29:14.045 T:1580     info <general>: Skipped 1 duplicate messages..
2024-01-16 11:29:14.045 T:1580    debug <general>: CVideoPlayer::HandleMessages - player started 1
2024-01-16 11:29:14.045 T:1580    debug <general>: CVideoPlayer::SetCaching - caching state 3
2024-01-16 11:29:14.045 T:1567    debug <general>: OnAVChange: CApplication::OnAVChange
2024-01-16 11:29:14.045 T:1580    debug <general>: CDVDClock::SetSpeedAdjust - adjusted:0.000000
2024-01-16 11:29:14.045 T:1580    debug <general>: CVideoPlayer::SetCaching - caching state 0
2024-01-16 11:29:14.045 T:1580    debug <general>: CDVDClock::SetSpeedAdjust - adjusted:0.000000
2024-01-16 11:29:14.045 T:1580    debug <general>: VideoPlayer::Sync - Audio - pts: 896000.000000, cache: 526418.892514, totalcache: 800000.011921
2024-01-16 11:29:14.045 T:1580    debug <general>: VideoPlayer::Sync - Video - pts: 709000.000000, cache: 50000.000000, totalcache: 100000.000000
2024-01-16 11:29:14.045 T:1588    debug <general>: CVideoPlayerAudio - CDVDMsg::GENERAL_RESYNC(369581.107486), level: 98, cache: 522780.829514
2024-01-16 11:29:14.045 T:1588    debug <general>: CDVDAudio::Resume - resume audio stream
2024-01-16 11:29:14.045 T:1409    debug <general>: ActiveAE - start sync of audio stream

Display More

In both cases, it first tries to create a 2 channel output stream:

Sample Rate : 44100
Sample Format : AE_FMT_S32NE
Channel Count : 2
Channel Layout: FL, FR

and then an 8 channel output stream:

Sample Rate : 192000
Sample Format : AE_FMT_S16NE
Channel Count : 8
Channel Layout: RAW, RAW, RAW, RAW, RAW, RAW, RAW, RAW

I suspected perhaps the DP 1.2 does not support 192000khz with 8 channels, but if I run a speaker-test command, it works fine:

Code

LibreELEC:~ # speaker-test -D hdmi:CARD=PCH,DEV=0 -c 8 -r 192000 -b 9600 -p 2400 -F S32_LE

speaker-test 1.2.8

Playback device is hdmi:CARD=PCH,DEV=0
Stream parameters are 192000Hz, S32_LE, 8 channels
Using 16 octaves of pink noise
Rate set to 192000Hz (requested 192000Hz)
Buffer size range from 8 to 131072
Period size range from 4 to 65536
Requested period time 2400 us
Requested buffer time 9600 us
was set period_size = 461
was set buffer_size = 1844
 0 - Front Left
 4 - Front Center
 1 - Front Right
 7 - Rear Right
 3 - Rear Right Center
 2 - Rear Left Center
 6 - Rear Left
 5 - LFE
Time per period = 23.984268

Display More

If I turn off passthrough in Kodi settings, LPCM 7.1 is sent fine via the DP for all 8 channel HD audio streams.

Any guidance on what I can check next?

**Da Flex** · January 17, 2024 at 4:18 PM

Double post. Continue here:

Thread

Force display output to DP with audio on HDMI

I have a Optiplex 3050 which has both a DisplayPort 1.2 (capable of 4k) and HDMI 1.4 (capable of 1080p only).

I'm using LibreElec 11 stable (although tried 12 nightly too) and I cannot get HD audio to work on the DP using a Benfei DP->HDMI adapter (reading around, seems to be a common problem with NUC's as well). DD/DTS work fine.

I can, however, get HD audio working over the HDMI 1.4 connection.

So I want to utilize both connections simultaneously but, despite trying for a few days, whenever I…

fezster

January 15, 2024 at 12:58 PM

HD Audio from DisplayPort - no sound (HDMI works)

Force display output to DP with audio on HDMI

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