你好，我在 2015 年的 Imac 16.1 21.5 A1418 上安装了 Ubuntu 22.04.4
- 声音效果不好：主声音控制已激活，但声音无法调整：静音或全音量。我可以通过 gnome-control-center / sound 上的应用程序进行调整。
- 它在模拟环绕声 40 上运行，但四个通道没有在好的扬声器上运行。
- 麦克风不工作
一些信息：
imac161@imac161-iMac:~$ grep "Codec:" /proc/asound/card*/codec*
/proc/asound/card0/codec#0:Codec: Intel Broadwell HDMI
/proc/asound/card1/codec#0:Codec: Cirrus Logic CS4208
imac161@imac161-iMac:~$ lsmod | grep snd
snd_hda_codec_hdmi 94208 1
snd_hda_codec_cirrus 24576 1
snd_hda_codec_generic 122880 1 snd_hda_codec_cirrus
ledtrig_audio 12288 1 snd_hda_codec_generic
snd_hda_intel 61440 7
snd_intel_dspcfg 32768 1 snd_hda_intel
snd_intel_sdw_acpi 16384 1 snd_intel_dspcfg
snd_hda_codec 212992 4 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec_cirrus
snd_hda_core 147456 5 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hda_codec_cirrus
snd_hwdep 20480 1 snd_hda_codec
snd_pcm 196608 5 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hda_core
snd_seq_midi 24576 0
snd_seq_midi_event 16384 1 snd_seq_midi
snd_rawmidi 57344 1 snd_seq_midi
snd_seq 118784 2 snd_seq_midi,snd_seq_midi_event
snd_seq_device 16384 3 snd_seq,snd_seq_midi,snd_rawmidi
snd_timer 49152 2 snd_seq,snd_pcm
snd 143360 23 snd_hda_codec_generic,snd_seq,snd_seq_device,snd_hda_codec_hdmi,snd_hwdep,snd_hda_intel,snd_hda_codec,snd_timer,snd_pcm,snd_rawmidi
soundcore 16384 1 snd
imac161@imac161-iMac:~$ pacmd list-sinks
1 sink(s) available.
* index: 1
name: <alsa_output.pci-0000_00_1b.0.analog-surround-40>
driver: <module-alsa-card.c>
flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL LATENCY DYNAMIC_LATENCY
state: RUNNING
suspend cause: (none)
priority: 9039
volume: front-left: 2620 / 4%, front-right: 2620 / 4%, rear-left: 2620 / 4%, rear-right: 2620 / 4%
balance 0.00
base volume: 65536 / 100%
volume steps: 128
muted: no
current latency: 17.14 ms
max request: 8 KiB
max rewind: 8 KiB
monitor source: 1
sample spec: s16le 4ch 44100Hz
channel map: front-left,front-right,rear-left,rear-right
Surround 4.0
used by: 1
linked by: 1
configured latency: 26.00 ms; range is 26.00 .. 2000.00 ms
card: 1 <alsa_card.pci-0000_00_1b.0>
module: 23
properties:
alsa.resolution_bits = "16"
device.api = "alsa"
device.class = "sound"
alsa.class = "generic"
alsa.subclass = "generic-mix"
alsa.name = "CS4208 Analog"
alsa.id = "CS4208 Analog"
alsa.subdevice = "0"
alsa.subdevice_name = "subdevice #0"
alsa.device = "0"
alsa.card = "1"
alsa.card_name = "HDA Intel PCH"
alsa.long_card_name = "HDA Intel PCH at 0xb1614000 irq 75"
alsa.driver_name = "snd_hda_intel"
device.bus_path = "pci-0000:00:1b.0"
sysfs.path = "/devices/pci0000:00/0000:00:1b.0/sound/card1"
device.bus = "pci"
device.vendor.id = "8086"
device.vendor.name = "Intel Corporation"
device.product.id = "9ca0"
device.product.name = "Wildcat Point-LP High Definition
Audio Controller"
device.form_factor = "internal"
device.string = "surround40:1"
device.buffering.buffer_size = "705600"
device.buffering.fragment_size = "352800"
device.access_mode = "mmap+timer"
device.profile.name = "analog-surround-40"
device.profile.description = "Surround analogique 4.0"
device.description = "Audio interne Surround analogique 4.0"
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"
active port: <analog-output-speaker>