Card 1 is a Nvidia graphic card; it does not allow to play sound on the internal speaker.
I found the solution. The Lenovo P520 is a dual codec workstation; ALC662 (hw:0,0) drives the rear audio plugs; ALC233 (hw:0,4) drives the front audio plugs and the internal speaker.So hw:0,4 should be used for playback.
Hope it will help other people.
NM
On Thu, Jul 30, 2020 at 1:16 AM Alan Corey <alan01346@xxxxxxxxx> wrote:
Try using card 1. Look at amixer -c 1
On 7/29/20, Nicolas Martin <nico.martin@xxxxxxxxx> wrote:
> Hi,
>
> I have a Lenovo P520 workstation with an internal speaker on which I'd like
> to play sound.
> OS installed is RHEL 7U6 with alsa 1.1.6
>
> the internal speaker is enabled in BIOS; however I don't have any sound
> output on it.
>
> The only way to have sound is to plug an external speaker.
>
> If I load the module snd-pcsp, there is an additional card that appears
> that I can use to play sound on the internal speaker, although the sound
> quality is very poor (crackling).
>
> I don't really know where to dig concerning this issue; whether it's a bug
> with the kernel module or alsa; I'd appreciate some guidance.
>
> The audio chipset (not using the Nvidia output):
> # lspci -v | grep -i audio
> 00:1f.3 Audio device: Intel Corporation 200 Series PCH HD Audio
> 65:00.1 Audio device: NVIDIA Corporation GP107GL High Definition Audio
> Controller (rev a1)
>
> Below the output of aplay -l and aplay -L:
> # aplay -l
> **** List of PLAYBACK Hardware Devices ****
> card 0: PCH [HDA Intel PCH], device 0: ALC662 rev3 Analog [ALC662 rev3
> Analog]
> Subdevices: 1/1
> Subdevice #0: subdevice #0
> card 0: PCH [HDA Intel PCH], device 4: ALC233 Analog [ALC233 Analog]
> Subdevices: 1/1
> Subdevice #0: subdevice #0
> 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: 1/1
> Subdevice #0: subdevice #0
> card 1: NVidia [HDA NVidia], device 8: HDMI 2 [HDMI 2]
> Subdevices: 1/1
> Subdevice #0: subdevice #0
> card 1: NVidia [HDA NVidia], device 9: HDMI 3 [HDMI 3]
> Subdevices: 1/1
> Subdevice #0: subdevice #0
>
> # aplay -L
> null
> Discard all samples (playback) or generate zero samples (capture)
> pulse
> PulseAudio Sound Server
> default:CARD=PCH
> HDA Intel PCH, ALC662 rev3 Analog
> Default Audio Device
> sysdefault:CARD=PCH
> HDA Intel PCH, ALC662 rev3 Analog
> Default Audio Device
> front:CARD=PCH,DEV=0
> HDA Intel PCH, ALC662 rev3 Analog
> Front speakers
> surround21:CARD=PCH,DEV=0
> HDA Intel PCH, ALC662 rev3 Analog
> 2.1 Surround output to Front and Subwoofer speakers
> surround40:CARD=PCH,DEV=0
> HDA Intel PCH, ALC662 rev3 Analog
> 4.0 Surround output to Front and Rear speakers
> surround41:CARD=PCH,DEV=0
> HDA Intel PCH, ALC662 rev3 Analog
> 4.1 Surround output to Front, Rear and Subwoofer speakers
> surround50:CARD=PCH,DEV=0
> HDA Intel PCH, ALC662 rev3 Analog
> 5.0 Surround output to Front, Center and Rear speakers
> surround51:CARD=PCH,DEV=0
> HDA Intel PCH, ALC662 rev3 Analog
> 5.1 Surround output to Front, Center, Rear and Subwoofer speakers
> surround71:CARD=PCH,DEV=0
> HDA Intel PCH, ALC662 rev3 Analog
> 7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
> hdmi:CARD=NVidia,DEV=0
> HDA NVidia, HDMI 0
> HDMI Audio Output
> hdmi:CARD=NVidia,DEV=1
> HDA NVidia, HDMI 1
> HDMI Audio Output
> hdmi:CARD=NVidia,DEV=2
> HDA NVidia, HDMI 2
> HDMI Audio Output
> hdmi:CARD=NVidia,DEV=3
> HDA NVidia, HDMI 3
> HDMI Audio Output
>
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