[alsa-devel] Missing surround channels with Nvidia HDMI & snd-hda-intel driver
Takashi Iwai
tiwai at suse.de
Mon Nov 13 17:40:35 CET 2017
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
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel at alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
>
More information about the Alsa-devel
mailing list