音频失真/噼啪作响:2010 年 MacBook 7.1 上的 Ubuntu 19.10

音频失真/噼啪作响:2010 年 MacBook 7.1 上的 Ubuntu 19.10

我已经在 MacBook 7,1, Mid-2010 上安装了 Ubuntu 19.10 (Eoan Ermine),A1342。不幸的是(与 Ubuntu 19.04 不同),音频无法正常工作,非常断断续续且失真。

inxi -A:

Audio:
  Device-1: NVIDIA MCP89 High Definition Audio driver: snd_hda_intel 
  Sound Server: ALSA v: k5.3.0-19-generic 

使用 lspci-nnk 命令:

00:08.0 Audio device [0403]: NVIDIA Corporation MCP89 High Definition Audio [10de:0d94] (rev a2)
    Subsystem: NVIDIA Corporation MCP89 High Definition Audio [10de:cb89]
    Kernel driver in use: snd_hda_intel
    Kernel modules: snd_hda_intel

aplay-l:

**** List of PLAYBACK Hardware Devices ****
card 0: NVidia [HDA NVidia], device 0: CS4206 Analog [CS4206 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: NVidia [HDA NVidia], device 1: CS4206 Digital [CS4206 Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: NVidia [HDA NVidia], device 7: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: NVidia [HDA NVidia], device 8: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

inxi-F:

System:
  Host: MacBook7.1 Kernel: 5.3.0-19-generic x86_64 bits: 64 
  Desktop: Gnome 3.34.1 Distro: Ubuntu 19.10 (Eoan Ermine) 
Machine:
  Type: Laptop System: Apple product: MacBook7,1 v: 1.0 
  Mobo: Apple model: Mac-F22C89C8 date: 06/01/10 
CPU:
  Topology: Dual Core model: Intel Core2 Duo P8600 bits: 64 type: MCP 
  L2 cache: 3072 KiB 
  Speed: 796 MHz min/max: 798/2394 MHz Core speeds (MHz): 1: 796 2: 796 
Graphics:
  Device-1: NVIDIA MCP89 [GeForce 320M] driver: nouveau v: kernel 
  Display: x11 server: X.Org 1.20.5 driver: nouveau 
  resolution: 1280x800~60Hz 
  OpenGL: renderer: NVAF v: 3.3 Mesa 19.2.1

pacmd信息:

Memory blocks currently allocated: 2, size: 113,8 KiB.
Memory blocks allocated during the whole lifetime: 30879, size: 50,1 MiB.
Memory blocks imported from other processes: 0, size: 0 B.
Memory blocks exported to other processes: 0, size: 0 B.
Total sample cache size: 49,9 KiB.
Default sample spec: s16le 2ch 44100Hz
Default channel map: front-left,front-right
Default sink name: alsa_output.pci-0000_00_08.0.analog-stereo
Default source name: alsa_output.pci-0000_00_08.0.analog-stereo.monitor
Memory blocks of type POOL: 2 allocated/14605 accumulated.
Memory blocks of type POOL_EXTERNAL: 0 allocated/310 accumulated.
Memory blocks of type APPENDED: 0 allocated/0 accumulated.
Memory blocks of type USER: 0 allocated/0 accumulated.
Memory blocks of type FIXED: 0 allocated/13130 accumulated.
Memory blocks of type IMPORTED: 0 allocated/3144 accumulated.
25 module(s) loaded.
    index: 0
    name: <module-device-restore>
    argument: <>
    used: -1
    load once: yes
    properties:
        module.author = "Lennart Poettering"
        module.description = "Automatically restore the volume/mute state of devices"
        module.version = "13.0"
    index: 1
    name: <module-stream-restore>
    argument: <>
    used: -1
    load once: yes
    properties:
        module.author = "Lennart Poettering"
        module.description = "Automatically restore the volume/mute/device state of streams"
        module.version = "13.0"
    index: 2
    name: <module-card-restore>
    argument: <>
    used: -1
    load once: yes
    properties:
        module.author = "Lennart Poettering"
        module.description = "Automatically restore profile of cards"
        module.version = "13.0"
    index: 3
    name: <module-augment-properties>
    argument: <>
    used: -1
    load once: yes
    properties:
        module.author = "Lennart Poettering"
        module.description = "Augment the property sets of streams with additional static information"
        module.version = "13.0"
    index: 4
    name: <module-switch-on-port-available>
    argument: <>
    used: -1
    load once: yes
    properties:
        module.author = "David Henningsson"
        module.description = "Switches ports and profiles when devices are plugged/unplugged"
        module.version = "13.0"
    index: 5
    name: <module-switch-on-connect>
    argument: <>
    used: -1
    load once: yes
    properties:
        module.author = "Michael Terry"
        module.description = "When a sink/source is added, switch to it or conditionally switch to it"
        module.version = "13.0"
    index: 6
    name: <module-udev-detect>
    argument: <>
    used: -1
    load once: yes
    properties:
        module.author = "Lennart Poettering"
        module.description = "Detect available audio hardware and load matching drivers"
        module.version = "13.0"
    index: 7
    name: <module-alsa-card>
    argument: <device_id="0" name="pci-0000_00_08.0" card_name="alsa_card.pci-0000_00_08.0" namereg_fail=false tsched=yes fixed_latency_range=no ignore_dB=no deferred_volume=yes use_ucm=yes avoid_resampling=no card_properties="module-udev-detect.discovered=1">
    used: 0
    load once: no
    properties:
        module.author = "Lennart Poettering"
        module.description = "ALSA Card"
        module.version = "13.0"
    index: 8
    name: <module-bluetooth-policy>
    argument: <>
    used: -1
    load once: yes
    properties:
        module.author = "Frédéric Dalleau, Pali Rohár"
        module.description = "Policy module to make using bluetooth devices out-of-the-box easier"
        module.version = "13.0"
    index: 9
    name: <module-bluetooth-discover>
    argument: <>
    used: -1
    load once: yes
    properties:
        module.author = "João Paulo Rechi Vita"
        module.description = "Detect available Bluetooth daemon and load the corresponding discovery module"
        module.version = "13.0"
    index: 10
    name: <module-bluez5-discover>
    argument: <>
    used: -1
    load once: yes
    properties:
        module.author = "João Paulo Rechi Vita"
        module.description = "Detect available BlueZ 5 Bluetooth audio devices and load BlueZ 5 Bluetooth audio drivers"
        module.version = "13.0"
    index: 11
    name: <module-native-protocol-unix>
    argument: <>
    used: -1
    load once: no
    properties:
        module.author = "Lennart Poettering"
        module.description = "Native protocol (UNIX sockets)"
        module.version = "13.0"
    index: 12
    name: <module-default-device-restore>
    argument: <>
    used: -1
    load once: yes
    properties:
        module.author = "Lennart Poettering"
        module.description = "Automatically restore the default sink and source"
        module.version = "13.0"
    index: 13
    name: <module-rescue-streams>
    argument: <>
    used: -1
    load once: yes
    properties:
        module.author = "Lennart Poettering"
        module.description = "When a sink/source is removed, try to move its streams to the default sink/source"
        module.version = "13.0"
    index: 14
    name: <module-always-sink>
    argument: <>
    used: -1
    load once: yes
    properties:
        module.author = "Colin Guthrie"
        module.description = "Always keeps at least one sink loaded even if it's a null one"
        module.version = "13.0"
    index: 15
    name: <module-intended-roles>
    argument: <>
    used: -1
    load once: yes
    properties:
        module.author = "Lennart Poettering"
        module.description = "Automatically set device of streams based on intended roles of devices"
        module.version = "13.0"
    index: 16
    name: <module-suspend-on-idle>
    argument: <>
    used: -1
    load once: yes
    properties:
        module.author = "Lennart Poettering"
        module.description = "When a sink/source is idle for too long, suspend it"
        module.version = "13.0"
    index: 17
    name: <module-console-kit>
    argument: <>
    used: -1
    load once: yes
    properties:
        module.author = "Lennart Poettering"
        module.description = "Create a client for each ConsoleKit session of this user"
        module.version = "13.0"
    index: 18
    name: <module-systemd-login>
    argument: <>
    used: -1
    load once: yes
    properties:
        module.author = "Lennart Poettering"
        module.description = "Create a client for each login session of this user"
        module.version = "13.0"
    index: 19
    name: <module-position-event-sounds>
    argument: <>
    used: -1
    load once: yes
    properties:
        module.author = "Lennart Poettering"
        module.description = "Position event sounds between L and R depending on the position on screen of the widget triggering them."
        module.version = "13.0"
    index: 20
    name: <module-role-cork>
    argument: <>
    used: -1
    load once: yes
    properties:
        module.author = "Lennart Poettering"
        module.description = "Mute & cork streams with certain roles while others exist"
        module.version = "13.0"
    index: 21
    name: <module-snap-policy>
    argument: <>
    used: -1
    load once: yes
    properties:
        module.author = "Canonical Ltd"
        module.description = "Ubuntu Snap policy management"
        module.version = "13.0"
    index: 22
    name: <module-filter-heuristics>
    argument: <>
    used: -1
    load once: yes
    properties:
        module.author = "Colin Guthrie"
        module.description = "Detect when various filters are desirable"
        module.version = "13.0"
    index: 23
    name: <module-filter-apply>
    argument: <>
    used: -1
    load once: yes
    properties:
        module.author = "Colin Guthrie"
        module.description = "Load filter sinks automatically when needed"
        module.version = "13.0"
    index: 24
    name: <module-cli-protocol-unix>
    argument: <>
    used: -1
    load once: no
    properties:
        module.author = "Lennart Poettering"
        module.description = "Command line interface protocol (UNIX sockets)"
        module.version = "13.0"
1 sink(s) available.
  * index: 0
    name: <alsa_output.pci-0000_00_08.0.analog-stereo>
    driver: <module-alsa-card.c>
    flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
    state: SUSPENDED
    suspend cause: IDLE
    priority: 9039
    volume: front-left: 29115 /  44% / -21,14 dB,   front-right: 29115 /  44% / -21,14 dB
            balance 0,00
    base volume: 52057 /  79% / -6,00 dB
    volume steps: 65537
    muted: no
    current latency: 0,00 ms
    max request: 0 KiB
    max rewind: 0 KiB
    monitor source: 0
    sample spec: s16le 2ch 44100Hz
    channel map: front-left,front-right
                 Stereo
    used by: 0
    linked by: 0
    configured latency: 0,00 ms; range is 0,50 .. 371,52 ms
    card: 0 <alsa_card.pci-0000_00_08.0>
    module: 7
    properties:
        alsa.resolution_bits = "16"
        device.api = "alsa"
        device.class = "sound"
        alsa.class = "generic"
        alsa.subclass = "generic-mix"
        alsa.name = "CS4206 Analog"
        alsa.id = "CS4206 Analog"
        alsa.subdevice = "0"
        alsa.subdevice_name = "subdevice #0"
        alsa.device = "0"
        alsa.card = "0"
        alsa.card_name = "HDA NVidia"
        alsa.long_card_name = "HDA NVidia at 0xd3280000 irq 23"
        alsa.driver_name = "snd_hda_intel"
        device.bus_path = "pci-0000:00:08.0"
        sysfs.path = "/devices/pci0000:00/0000:00:08.0/sound/card0"
        device.bus = "pci"
        device.vendor.id = "10de"
        device.vendor.name = "NVIDIA Corporation"
        device.product.id = "0d94"
        device.product.name = "MCP89 High Definition Audio"
        device.form_factor = "internal"
        device.string = "front:0"
        device.buffering.buffer_size = "65536"
        device.buffering.fragment_size = "32768"
        device.access_mode = "mmap+timer"
        device.profile.name = "analog-stereo"
        device.profile.description = "Analog Stereo"
        device.description = "Built-in Audio Analog Stereo"
        alsa.mixer_name = "Cirrus Logic CS4206"
        alsa.components = "HDA:10134206,106b1f00,00100301 HDA:10de000c,10de0101,00100200"
        module-udev-detect.discovered = "1"
        device.icon_name = "audio-card-pci"
    ports:
        analog-output-speaker: Speakers (priority 10000, latency offset 0 usec, available: unknown)
            properties:
                device.icon_name = "audio-speakers"
        analog-output-headphones: Headphones (priority 9900, latency offset 0 usec, available: no)
            properties:
                device.icon_name = "audio-headphones"
    active port: <analog-output-speaker>
1 source(s) available.
  * index: 0
    name: <alsa_output.pci-0000_00_08.0.analog-stereo.monitor>
    driver: <module-alsa-card.c>
    flags: DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
    state: SUSPENDED
    suspend cause: IDLE
    priority: 1030
    volume: front-left: 65536 / 100% / 0,00 dB,   front-right: 65536 / 100% / 0,00 dB
            balance 0,00
    base volume: 65536 / 100% / 0,00 dB
    volume steps: 65537
    muted: no
    current latency: 0,00 ms
    max rewind: 0 KiB
    sample spec: s16le 2ch 44100Hz
    channel map: front-left,front-right
                 Stereo
    used by: 0
    linked by: 0
    configured latency: 0,00 ms; range is 0,50 .. 371,52 ms
    monitor_of: 0
    card: 0 <alsa_card.pci-0000_00_08.0>
    module: 7
    properties:
        device.description = "Monitor of Built-in Audio Analog Stereo"
        device.class = "monitor"
        alsa.card = "0"
        alsa.card_name = "HDA NVidia"
        alsa.long_card_name = "HDA NVidia at 0xd3280000 irq 23"
        alsa.driver_name = "snd_hda_intel"
        device.bus_path = "pci-0000:00:08.0"
        sysfs.path = "/devices/pci0000:00/0000:00:08.0/sound/card0"
        device.bus = "pci"
        device.vendor.id = "10de"
        device.vendor.name = "NVIDIA Corporation"
        device.product.id = "0d94"
        device.product.name = "MCP89 High Definition Audio"
        device.form_factor = "internal"
        device.string = "0"
        module-udev-detect.discovered = "1"
        device.icon_name = "audio-card-pci"
11 client(s) logged in.
    index: 0
    driver: <module-systemd-login.c>
    owner module: 18
    properties:
        application.name = "Login Session 1"
        systemd-login.session = "1"
    index: 4
    driver: <protocol-native.c>
    owner module: 11
    properties:
        application.name = "GNOME Shell Volume Control"
        native-protocol.peer = "UNIX socket client"
        native-protocol.version = "33"
        application.id = "org.gnome.VolumeControl"
        application.icon_name = "multimedia-volume-control"
        application.version = "3.34.1"
        application.process.id = "1171"
        application.process.user = 
        application.process.host = 
        application.process.binary = "gnome-shell"
        application.language = "en_US.UTF-8"
        window.x11.display = ":0"
        application.process.machine_id = "3510375181dd40a892dccb932abb57ce"
    index: 5
    driver: <protocol-native.c>
    owner module: 11
    properties:
        application.name = "GNOME Volume Control Media Keys"
        native-protocol.peer = "UNIX socket client"
        native-protocol.version = "33"
        application.id = "org.gnome.VolumeControl"
        application.icon_name = "multimedia-volume-control"
        application.version = ""
        application.process.id = "1371"
        application.process.user = 
        application.process.host = 
        application.process.binary = "gsd-media-keys"
        application.language = "en_US.UTF-8"
        window.x11.display = ":0"
        application.process.machine_id = "3510375181dd40a892dccb932abb57ce"
    index: 7
    driver: <protocol-native.c>
    owner module: 11
    properties:
        application.name = "Firefox"
        native-protocol.peer = "UNIX socket client"
        native-protocol.version = "33"
        window.x11.display = ":0"
        window.x11.screen = "0"
        application.process.id = "2756"
        application.process.user = 
        application.process.host = 
        application.process.binary = "firefox"
        application.language = "en_US.UTF-8"
        application.process.machine_id = "3510375181dd40a892dccb932abb57ce"
        application.icon_name = "firefox"
    index: 8
    driver: <protocol-native.c>
    owner module: 11
    properties:
        application.name = "Firefox"
        native-protocol.peer = "UNIX socket client"
        native-protocol.version = "33"
        application.icon_name = "firefox"
        application.version = "69.0.3"
        application.process.id = "2756"
        application.process.user = 
        application.process.host = 
        application.process.binary = "firefox"
        application.language = "en_US.UTF-8"
        window.x11.display = ":0"
        application.process.machine_id = "3510375181dd40a892dccb932abb57ce"
    index: 9
    driver: <protocol-native.c>
    owner module: 11
    properties:
        application.name = "AudioIPC Server"
        native-protocol.peer = "UNIX socket client"
        native-protocol.version = "33"
        application.process.id = "2756"
        application.process.user = 
        application.process.host = 
        application.process.binary = "firefox"
        application.language = "en_US.UTF-8"
        window.x11.display = ":0"
        application.process.machine_id = "3510375181dd40a892dccb932abb57ce"
        application.icon_name = "firefox"
    index: 10
    driver: <protocol-native.c>
    owner module: 11
    properties:
        application.name = "Terminal"
        native-protocol.peer = "UNIX socket client"
        native-protocol.version = "33"
        application.icon_name = "org.gnome.Terminal"
        window.x11.display = ":0"
        window.x11.screen = "0"
        application.process.id = "3166"
        application.process.user = 
        application.process.host =
        application.process.binary = "gnome-terminal-server"
        application.language = "en_US.UTF-8"
        application.process.machine_id = "3510375181dd40a892dccb932abb57ce"
    index: 12
    driver: <protocol-native.c>
    owner module: 11
    properties:
        application.name = "GNOME Settings"
        native-protocol.peer = "UNIX socket client"
        native-protocol.version = "33"
        application.id = "org.gnome.VolumeControl"
        application.icon_name = "multimedia-volume-control"
        application.version = ""
        application.process.id = "4207"
        application.process.user = 
        application.process.host = 
        application.process.binary = "gnome-control-center"
        application.language = "en_US.UTF-8"
        window.x11.display = ":0"
        application.process.machine_id = "3510375181dd40a892dccb932abb57ce"
    index: 13
    driver: <protocol-native.c>
    owner module: 11
    properties:
        application.name = "Settings"
        native-protocol.peer = "UNIX socket client"
        native-protocol.version = "33"
        window.x11.display = ":0"
        window.x11.screen = "0"
        application.process.id = "4207"
        application.process.user = 
        application.process.host = 
        application.process.binary = "gnome-control-center"
        application.language = "en_US.UTF-8"
        application.process.machine_id = "3510375181dd40a892dccb932abb57ce"
        application.icon_name = "org.gnome.Settings"
    index: 14
    driver: <protocol-native.c>
    owner module: 11
    properties:
        application.name = "Mutter"
        native-protocol.peer = "UNIX socket client"
        native-protocol.version = "33"
        application.process.id = "1171"
        application.process.user = 
        application.process.host = 
        application.process.binary = "gnome-shell"
        application.language = "en_US.UTF-8"
        window.x11.display = ":0"
        application.process.machine_id = "3510375181dd40a892dccb932abb57ce"
    index: 16
    driver: <cli.c>
    owner module: 24
    properties:
        application.name = "UNIX socket client"
1 card(s) available.
    index: 0
    name: <alsa_card.pci-0000_00_08.0>
    driver: <module-alsa-card.c>
    owner module: 7
    properties:
        alsa.card = "0"
        alsa.card_name = "HDA NVidia"
        alsa.long_card_name = "HDA NVidia at 0xd3280000 irq 23"
        alsa.driver_name = "snd_hda_intel"
        device.bus_path = "pci-0000:00:08.0"
        sysfs.path = "/devices/pci0000:00/0000:00:08.0/sound/card0"
        device.bus = "pci"
        device.vendor.id = "10de"
        device.vendor.name = "NVIDIA Corporation"
        device.product.id = "0d94"
        device.product.name = "MCP89 High Definition Audio"
        device.form_factor = "internal"
        device.string = "0"
        device.description = "Built-in Audio"
        module-udev-detect.discovered = "1"
        device.icon_name = "audio-card-pci"
    profiles:
        input:analog-stereo: Analog Stereo Input (priority 65, available: unknown)
        output:analog-stereo: Analog Stereo Output (priority 6500, available: unknown)
        output:analog-stereo+input:analog-stereo: Analog Stereo Duplex (priority 6565, available: unknown)
        output:analog-surround-21: Analog Surround 2.1 Output (priority 1300, available: unknown)
        output:analog-surround-21+input:analog-stereo: Analog Surround 2.1 Output + Analog Stereo Input (priority 1365, available: unknown)
        output:analog-surround-40: Analog Surround 4.0 Output (priority 1200, available: unknown)
        output:analog-surround-40+input:analog-stereo: Analog Surround 4.0 Output + Analog Stereo Input (priority 1265, available: unknown)
        output:iec958-stereo: Digital Stereo (IEC958) Output (priority 5500, available: unknown)
        output:iec958-stereo+input:analog-stereo: Digital Stereo (IEC958) Output + Analog Stereo Input (priority 5565, available: unknown)
        output:hdmi-stereo: Digital Stereo (HDMI) Output (priority 5900, available: no)
        output:hdmi-stereo+input:analog-stereo: Digital Stereo (HDMI) Output + Analog Stereo Input (priority 5965, available: no)
        output:hdmi-surround: Digital Surround 5.1 (HDMI) Output (priority 800, available: no)
        output:hdmi-surround+input:analog-stereo: Digital Surround 5.1 (HDMI) Output + Analog Stereo Input (priority 865, available: no)
        output:hdmi-surround71: Digital Surround 7.1 (HDMI) Output (priority 800, available: no)
        output:hdmi-surround71+input:analog-stereo: Digital Surround 7.1 (HDMI) Output + Analog Stereo Input (priority 865, available: no)
        output:hdmi-stereo-extra1: Digital Stereo (HDMI 2) Output (priority 5700, available: no)
        output:hdmi-stereo-extra1+input:analog-stereo: Digital Stereo (HDMI 2) Output + Analog Stereo Input (priority 5765, available: no)
        output:hdmi-surround-extra1: Digital Surround 5.1 (HDMI 2) Output (priority 600, available: no)
        output:hdmi-surround-extra1+input:analog-stereo: Digital Surround 5.1 (HDMI 2) Output + Analog Stereo Input (priority 665, available: no)
        output:hdmi-surround71-extra1: Digital Surround 7.1 (HDMI 2) Output (priority 600, available: no)
        output:hdmi-surround71-extra1+input:analog-stereo: Digital Surround 7.1 (HDMI 2) Output + Analog Stereo Input (priority 665, available: no)
        output:hdmi-stereo-extra2: Digital Stereo (HDMI 3) Output (priority 5700, available: no)
        output:hdmi-stereo-extra2+input:analog-stereo: Digital Stereo (HDMI 3) Output + Analog Stereo Input (priority 5765, available: no)
        output:hdmi-surround-extra2: Digital Surround 5.1 (HDMI 3) Output (priority 600, available: no)
        output:hdmi-surround-extra2+input:analog-stereo: Digital Surround 5.1 (HDMI 3) Output + Analog Stereo Input (priority 665, available: no)
        output:hdmi-surround71-extra2: Digital Surround 7.1 (HDMI 3) Output (priority 600, available: no)
        output:hdmi-surround71-extra2+input:analog-stereo: Digital Surround 7.1 (HDMI 3) Output + Analog Stereo Input (priority 665, available: no)
        off: Off (priority 0, available: unknown)
    active profile: <output:analog-stereo>
    sinks:
        alsa_output.pci-0000_00_08.0.analog-stereo/#0: Built-in Audio Analog Stereo
    sources:
        alsa_output.pci-0000_00_08.0.analog-stereo.monitor/#0: Monitor of Built-in Audio Analog Stereo
    ports:
        analog-input-mic: Microphone (priority 8700, latency offset 0 usec, available: unknown)
            properties:
                device.icon_name = "audio-input-microphone"
        analog-output-speaker: Speakers (priority 10000, latency offset 0 usec, available: unknown)
            properties:
                device.icon_name = "audio-speakers"
        analog-output-headphones: Headphones (priority 9900, latency offset 0 usec, available: no)
            properties:
                device.icon_name = "audio-headphones"
        iec958-stereo-output: Digital Output (S/PDIF) (priority 0, latency offset 0 usec, available: unknown)
            properties:

        hdmi-output-0: HDMI / DisplayPort (priority 5900, latency offset 0 usec, available: no)
            properties:
                device.icon_name = "video-display"
        hdmi-output-1: HDMI / DisplayPort 2 (priority 5800, latency offset 0 usec, available: no)
            properties:
                device.icon_name = "video-display"
        hdmi-output-2: HDMI / DisplayPort 3 (priority 5700, latency offset 0 usec, available: no)
            properties:
                device.icon_name = "video-display"
0 sink input(s) available.
0 source output(s) available.
1 cache entrie(s) available.
    name: <bell-window-system>
    index: 0
    sample spec: s16le 2ch 44100Hz
    channel map: front-left,front-right
                 Stereo
    length: 51048
    duration: 0,3 s
    volume: n/a
            balance 0,00
    lazy: no
    filename: <n/a>
    properties:
        media.role = "event"
        event.description = "Bell event"
        event.id = "bell-window-system"
        media.name = "bell-window-system"
        media.filename = "/usr/share//sounds/Yaru/stereo/bell.oga"
        application.name = "Mutter"
        native-protocol.peer = "UNIX socket client"
        native-protocol.version = "33"
        application.process.id = "1171"
        application.process.user = "Macbook"
        application.process.host = "MacBook"
        application.process.binary = "gnome-shell"
        application.language = "en_US.UTF-8"
        window.x11.display = ":0"
        application.process.machine_id = "3510375181dd40a892dccb932abb57ce"

答案1

我对同一型号的 Mac 也遇到了同样的问题。

它在 19.04 上运行良好的事实表明内核 5.0 和内核 5.3(19.10 的内核)之间可能发生了某些事情。

的确,此用户仅将内核从 4.19 更新到 5.2 就遇到了同样的问题。

该错误已报告内核网站,有人认出了错误提交,并且已经提出了补丁。

因此,我猜您要么使用此补丁重新编译 5.3 内核,要么安装 5.0 内核;或者像我一样回滚到 19.04!

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