[alsa-devel] Missing surround channels with Nvidia HDMI & snd-hda-intel driver
VDR User
user.vdr at gmail.com
Mon Nov 13 18:18:39 CET 2017
Hi Takashi,
Thanks for your reply. I have no clue unfortunately as I just noticed
it now. Is there a previous kernel you could recommend I try prior to
any or big changes to how snd-hda-intel works?
-Derek
On Mon, Nov 13, 2017 at 8:40 AM, Takashi Iwai <tiwai at suse.de> wrote:
> On Sun, 12 Nov 2017 19:01:14 +0100,
> VDR User wrote:
>>
>> Hi. I just noticed that I'm missing some surround channels and I think
>> it may be a bug in the alsa drivers because my current setup used to
>> work just fine.
>
> If it's a regression, which kernel did work and which started a
> regression? This alone would be a good help for tracking down the
> problem.
>
>
> Takashi
>
>> I'm running Debian Testing, stable kernel 4.13.12,
>> alsa-utils 1.1.3-1. My ~/.asoundrc is:
>>
>> ~$ cat .asoundrc
>> pcm.!default "hdmi:NVidia,1"
>> ~$
>>
>> I am not setting anything on my kernel load line:
>>
>> echo 'Loading Linux 4.13.12-amd ...'
>> linux /vmlinuz-4.13.12-amd
>> root=UUID=6df5733d-b089-450c-9ec6-661dd013c7c0 ro
>> echo 'Loading initial ramdisk ...'
>> initrd /initrd.img-4.13.12-amd
>>
>> The driver being used is snd-hda-intel with an Nvidia GT520 video
>> card. And lastly I do not have Pulse or a desktop environment. This is
>> a minimal HTPC setup that runs only an xserver to provide video
>> output, with audio/video being sent to my surround receiver via HDMI.
>>
>> The first thing I noticed was mpv-player was downmixing 5.1 to 3.1 and
>> giving the following log message:
>>
>> [ao/alsa] trying to set ALSA channel map: FL FR FC LFE RL RR
>> [ao/alsa] channel map reported by ALSA: FL FR FC LFE UNKNOWN UNKNOWN
>> [ao/alsa] which we understand as: fl-fr-fc-lfe-na-na
>> [ao/alsa] using the ALSA channel map.
>> [ao/alsa] hw pausing supported: yes
>> [ao/alsa] buffersize: 2720 samples
>> [ao/alsa] period size: 160 samples
>> [ao/alsa] device buffer: 2720 samples.
>> [ao/alsa] using soft-buffer of 8820 samples.
>> [cplayer] AO: [alsa] 44100Hz fl-fr-fc-lfe-na-na (3.1) 6ch s32
>> [cplayer] AO: Description: ALSA audio output
>> [af] Adding filter lavrresample
>> [lavrresample] Remix: 5.1 -> 3.1
>> [af] Audio filter chain:
>> [af] [in] 44100Hz 5.1 6ch floatp
>> [af] [lavrresample] 44100Hz fl-fr-fc-lfe-na-na (3.1) 6ch s32 [a]
>> [af] [out] 44100Hz fl-fr-fc-lfe-na-na (3.1) 6ch s32
>> [af] [ao] 44100Hz fl-fr-fc-lfe-na-na (3.1) 6ch s32
>>
>> That makes it look like Rear Left/Right channels are absent. I think
>> ran speaker-test. 4 and 5 show as "Unknown" but correctly audibly
>> announced as "front center" and "subwoofer" respectively:
>>
>> ~$ speaker-test -c 6 -t wav
>>
>> speaker-test 1.1.3
>>
>> Playback device is default
>> Stream parameters are 48000Hz, S16_LE, 6 channels
>> WAV file(s)
>> Rate set to 48000Hz (requested 48000Hz)
>> Buffer size range from 64 to 5440
>> Period size range from 32 to 2720
>> Using max buffer size 5440
>> Periods = 4
>> was set period_size = 1088
>> was set buffer_size = 5440
>> 0 - Front Left
>> 1 - Front Right
>> 3 - Rear Right
>> 2 - Rear Left
>> 4 - Unknown
>> 5 - Unknown
>>
>> Additional information that may be of use:
>>
>> ~$ aplay -l
>> **** List of PLAYBACK Hardware Devices ****
>> card 1: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
>> Subdevices: 1/1
>> Subdevice #0: subdevice #0
>> card 1: NVidia [HDA NVidia], device 7: HDMI 1 [HDMI 1]
>> Subdevices: 0/1
>> Subdevice #0: subdevice #0
>>
>> ~$ cat /proc/asound/card1/eld#0.1
>> monitor_present 1
>> eld_valid 1
>> monitor_name SONY AVAMP
>>
>> connection_type HDMI
>> eld_version [0x2] CEA-861D or below
>> edid_version [0x3] CEA-861-B, C or D
>> manufacture_id 0xd94d
>> product_id 0xf02
>> port_id 0x200
>> support_hdcp 0
>> support_ai 0
>> audio_sync_delay 0
>> speakers [0x5f] FL/FR LFE FC RL/RR RC RLC/RRC
>> sad_count 12
>> sad0_coding_type [0xc] MLP (Dolby TrueHD)
>> sad0_channels 2
>> sad0_rates [0x1ec0] 44100 48000 88200 96000 176400 192000
>> sad1_coding_type [0xc] MLP (Dolby TrueHD)
>> sad1_channels 6
>> sad1_rates [0x1ec0] 44100 48000 88200 96000 176400 192000
>> sad2_coding_type [0xc] MLP (Dolby TrueHD)
>> sad2_channels 8
>> sad2_rates [0x6c0] 44100 48000 88200 96000
>> sad3_coding_type [0xb] DTS-HD
>> sad3_channels 2
>> sad3_rates [0x1ec0] 44100 48000 88200 96000 176400 192000
>> sad4_coding_type [0xb] DTS-HD
>> sad4_channels 6
>> sad4_rates [0x1ec0] 44100 48000 88200 96000 176400 192000
>> sad5_coding_type [0xb] DTS-HD
>> sad5_channels 8
>> sad5_rates [0x6c0] 44100 48000 88200 96000
>> sad6_coding_type [0x1] LPCM
>> sad6_channels 2
>> sad6_rates [0x1ee0] 32000 44100 48000 88200 96000 176400 192000
>> sad6_bits [0xe0000] 16 20 24
>> sad7_coding_type [0x1] LPCM
>> sad7_channels 6
>> sad7_rates [0x1ee0] 32000 44100 48000 88200 96000 176400 192000
>> sad7_bits [0xe0000] 16 20 24
>> sad8_coding_type [0x1] LPCM
>> sad8_channels 8
>> sad8_rates [0x1ee0] 32000 44100 48000 88200 96000 176400 192000
>> sad8_bits [0xe0000] 16 20 24
>> sad9_coding_type [0x2] AC-3
>> sad9_channels 6
>> sad9_rates [0xe0] 32000 44100 48000
>> sad9_max_bitrate 680000
>> sad10_coding_type [0x7] DTS
>> sad10_channels 6
>> sad10_rates [0x6e0] 32000 44100 48000 88200 96000
>> sad10_max_bitrate 1536000
>> sad11_coding_type [0xa] E-AC-3/DD+ (Dolby Digital Plus)
>> sad11_channels 8
>> sad11_rates [0xc0] 44100 48000
>>
>> 02:00.0 VGA compatible controller: NVIDIA Corporation GF119 [GeForce
>> GT 520] (rev a1) (prog-if 00 [VGA controller])
>> Subsystem: eVga.com. Corp. GF119 [GeForce GT 520]
>> Flags: bus master, fast devsel, latency 0, IRQ 25
>> Memory at fd000000 (32-bit, non-prefetchable) [size=16M]
>> Memory at f0000000 (64-bit, prefetchable) [size=128M]
>> Memory at fa000000 (64-bit, prefetchable) [size=32M]
>> I/O ports at ec00 [size=128]
>> [virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
>> Capabilities: <access denied>
>> Kernel driver in use: nvidia
>> Kernel modules: nvidia
>>
>> 02:00.1 Audio device: NVIDIA Corporation GF119 HDMI Audio Controller (rev a1)
>> Subsystem: eVga.com. Corp. GF119 HDMI Audio Controller
>> Flags: bus master, fast devsel, latency 0, IRQ 17
>> Memory at fea7c000 (32-bit, non-prefetchable) [size=16K]
>> Capabilities: <access denied>
>> Kernel driver in use: snd_hda_intel
>> Kernel modules: snd_hda_intel
>> _______________________________________________
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>> Alsa-devel at alsa-project.org
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>>
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