[pulseaudio-tickets] [Bug 93651] pulseaudio try to open non-existent /dev/snd/pcm* which hugely increased startup time

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93651

--- Comment #3 from Tom Yan <tom.ty89 at gmail.com> ---
Created attachment 120932
  --> https://bugs.freedesktop.org/attachment.cgi?id=120932&action=edit
pulseaudio -vvv with builtin audio enabled

It seems that it's not really about hdmi/dp sound, but snd-hda-intel in
general. I just enabled the builtin realtek hd audio, similar thing happen to
it as well, while it has no hdmi PCM. My Xonar STX, which use snd-virtuoso
instead, has both the analog and iec958 PCMs just like the realtek, but it
doesn't suffer from this issue.

[tom at localhost ~]$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: STX [Xonar STX], device 0: Multichannel [Multichannel]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: STX [Xonar STX], device 1: Digital [Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: PCH [HDA Intel PCH], device 0: ALC887-VD Analog [ALC887-VD Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: PCH [HDA Intel PCH], device 1: ALC887-VD Digital [ALC887-VD Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: NVidia [HDA NVidia], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: NVidia [HDA NVidia], device 8: HDMI 2 [HDMI 2]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

[tom at localhost ~]$ aplay -L
null
    Discard all samples (playback) or generate zero samples (capture)
pulse
    PulseAudio Sound Server
default:CARD=STX
    Xonar STX, Multichannel
    Default Audio Device
sysdefault:CARD=STX
    Xonar STX, Multichannel
    Default Audio Device
front:CARD=STX,DEV=0
    Xonar STX, Multichannel
    Front speakers
surround21:CARD=STX,DEV=0
    Xonar STX, Multichannel
    2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=STX,DEV=0
    Xonar STX, Multichannel
    4.0 Surround output to Front and Rear speakers
surround41:CARD=STX,DEV=0
    Xonar STX, Multichannel
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=STX,DEV=0
    Xonar STX, Multichannel
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=STX,DEV=0
    Xonar STX, Multichannel
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=STX,DEV=0
    Xonar STX, Multichannel
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=STX,DEV=0
    Xonar STX, Multichannel
    IEC958 (S/PDIF) Digital Audio Output
default:CARD=PCH
    HDA Intel PCH, ALC887-VD Analog
    Default Audio Device
sysdefault:CARD=PCH
    HDA Intel PCH, ALC887-VD Analog
    Default Audio Device
front:CARD=PCH,DEV=0
    HDA Intel PCH, ALC887-VD Analog
    Front speakers
surround21:CARD=PCH,DEV=0
    HDA Intel PCH, ALC887-VD Analog
    2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=PCH,DEV=0
    HDA Intel PCH, ALC887-VD Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=PCH,DEV=0
    HDA Intel PCH, ALC887-VD Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=PCH,DEV=0
    HDA Intel PCH, ALC887-VD Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=PCH,DEV=0
    HDA Intel PCH, ALC887-VD Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=PCH,DEV=0
    HDA Intel PCH, ALC887-VD Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=PCH,DEV=0
    HDA Intel PCH, ALC887-VD Digital
    IEC958 (S/PDIF) Digital Audio Output
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

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