在我的全新 Dell G3 15 3590 上将 ubuntu 18.04 更新到 18.04.4 后，预装了 ubuntu（没有 windows/双启动），我只得到虚拟输出，没有声音。我是 linux 新手（以前只用过苹果），也不是工程师，所以我想快速学习 linux ubuntu 的工作原理，并阅读了许多类似问题的解决方案，但还没有找到完全相同的问题和正确的答案。
也许这里有人可以帮助我？？
我目前发现的情况：
当音频仍在工作时，它会在设置中显示：speaker-sof-skl_hda_card 和 Digital Microphone-sof-skl_hda_card
自从它不再工作以来我发现了以下情况：
音频设备：NVIDIA Corporation GP107GL 高清晰度音频控制器（rev a1）
在设置/更新附加驱动程序下：
- NVIDIA 公司：未知
设备正在使用推荐的驱动程序：使用 NVIDIA 驱动程序元包 nvidia-driver-440（专有，已测试）
英特尔公司：未知
该设备不工作：*请勿使用该设备
英特尔公司：未知
- 此设备正在使用备用驱动程序：
- 使用 oem-fix-audio-intel-dmic 的附加文件来启用英特尔 DMIC 音频（开源）
我尝试了终端和
$ lspci -v
00:00.0 Host bridge: Intel Corporation Device 3e10 (rev 07)
Subsystem: Dell Device 0949
Flags: bus master, fast devsel, latency 0
Capabilities: <access denied>
Kernel driver in use: skl_uncore
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor PCIe Controller (x16) (rev 07) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 122
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: 00004000-00004fff
Memory behind bridge: 90000000-a30fffff
Capabilities: <access denied>
Kernel driver in use: pcieport
00:02.0 VGA compatible controller: Intel Corporation Device 3e9b (prog-if 00 [VGA controller])
Subsystem: Dell Device 0949
Flags: bus master, fast devsel, latency 0, IRQ 129
Memory at a4000000 (64-bit, non-prefetchable) [size=16M]
Memory at 80000000 (64-bit, prefetchable) [size=256M]
I/O ports at 5000 [size=64]
[virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: i915
Kernel modules: i915
00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 07)
Subsystem: Dell Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem
Flags: fast devsel, IRQ 16
Memory at a5310000 (64-bit, non-prefetchable) [size=32K]
Capabilities: <access denied>
Kernel driver in use: proc_thermal
Kernel modules: processor_thermal_device
00:08.0 System peripheral: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th Gen Core Processor Gaussian Mixture Model
Subsystem: Dell Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th Gen Core Processor Gaussian Mixture Model
Flags: fast devsel, IRQ 255
Memory at a532d000 (64-bit, non-prefetchable) [disabled] [size=4K]
Capabilities: <access denied>
00:12.0 Signal processing controller: Intel Corporation Cannon Lake PCH Thermal Controller (rev 10)
Subsystem: Dell Device 0949
Flags: fast devsel, IRQ 16
Memory at a532c000 (64-bit, non-prefetchable) [size=4K]
Capabilities: <access denied>
Kernel driver in use: intel_pch_thermal
Kernel modules: intel_pch_thermal
00:14.0 USB controller: Intel Corporation Cannon Lake PCH USB 3.1 xHCI Host Controller (rev 10) (prog-if 30 [XHCI])
Subsystem: Dell Device 0949
Flags: medium devsel, IRQ 125
Memory at a5300000 (64-bit, non-prefetchable) [size=64K]
Capabilities: <access denied>
Kernel driver in use: xhci_hcd
00:14.2 RAM memory: Intel Corporation Cannon Lake PCH Shared SRAM (rev 10)
Subsystem: Dell Device 0949
Flags: fast devsel
Memory at a5322000 (64-bit, non-prefetchable) [disabled] [size=8K]
Memory at a532b000 (64-bit, non-prefetchable) [disabled] [size=4K]
Capabilities: <access denied>
00:14.3 Network controller: Intel Corporation Wireless-AC 9560 [Jefferson Peak] (rev 10)
Subsystem: Intel Corporation Device 4030
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at a531c000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: iwlwifi
Kernel modules: iwlwifi
00:15.0 Serial bus controller [0c80]: Intel Corporation Device a368 (rev 10)
Subsystem: Dell Device 0949
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at a532a000 (64-bit, non-prefetchable) [size=4K]
Memory at a5329000 (64-bit, non-prefetchable) [size=4K]
Capabilities: <access denied>
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:15.1 Serial bus controller [0c80]: Intel Corporation Device a369 (rev 10)
Subsystem: Dell Device 0949
Flags: bus master, fast devsel, latency 0, IRQ 17
Memory at 7f800000 (64-bit, non-prefetchable) [size=4K]
Capabilities: <access denied>
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:16.0 Communication controller: Intel Corporation Cannon Lake PCH HECI Controller (rev 10)
Subsystem: Dell Device 0949
Flags: bus master, fast devsel, latency 0, IRQ 127
Memory at a5327000 (64-bit, non-prefetchable) [size=4K]
Capabilities: <access denied>
Kernel driver in use: mei_me
Kernel modules: mei_me
00:17.0 SATA controller: Intel Corporation Device a353 (rev 10) (prog-if 01 [AHCI 1.0])
Subsystem: Dell Device 0949
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 126
Memory at a5320000 (32-bit, non-prefetchable) [size=8K]
Memory at a5326000 (32-bit, non-prefetchable) [size=256]
I/O ports at 5090 [size=8]
I/O ports at 5080 [size=4]
I/O ports at 5060 [size=32]
Memory at a5325000 (32-bit, non-prefetchable) [size=2K]
Capabilities: <access denied>
Kernel driver in use: ahci
Kernel modules: ahci
00:1d.0 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port 9 (rev f0) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 123
Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
Memory behind bridge: a5200000-a52fffff
Capabilities: <access denied>
Kernel driver in use: pcieport
00:1d.5 PCI bridge: Intel Corporation Device a335 (rev f0) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 124
Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
I/O behind bridge: 00003000-00003fff
Memory behind bridge: a5100000-a51fffff
Capabilities: <access denied>
Kernel driver in use: pcieport
00:1f.0 ISA bridge: Intel Corporation Device a30d (rev 10)
Subsystem: Dell Device 0949
Flags: bus master, fast devsel, latency 0
00:1f.3 Multimedia audio controller: Intel Corporation Cannon Lake PCH cAVS (rev 10)
Subsystem: Dell Device 0949
Flags: bus master, fast devsel, latency 32, IRQ 16
Memory at a5318000 (64-bit, non-prefetchable) [size=16K]
Memory at a5000000 (64-bit, non-prefetchable) [size=1M]
Capabilities: <access denied>
Kernel driver in use: sof-audio-pci
Kernel modules: snd_hda_intel, sof_pci_dev
00:1f.4 SMBus: Intel Corporation Cannon Lake PCH SMBus Controller (rev 10)
Subsystem: Dell Device 0949
Flags: medium devsel, IRQ 255
Memory at a5324000 (64-bit, non-prefetchable) [size=256]
I/O ports at efa0 [size=32]
Kernel modules: i2c_i801
00:1f.5 Serial bus controller [0c80]: Intel Corporation Cannon Lake PCH SPI Controller (rev 10)
Subsystem: Dell Device 0949
Flags: fast devsel
Memory at fe010000 (32-bit, non-prefetchable) [size=4K]
01:00.0 VGA compatible controller: NVIDIA Corporation Device 1c91 (rev a1) (prog-if 00 [VGA controller])
Subsystem: Dell Device 0949
Flags: bus master, fast devsel, latency 0, IRQ 138
Memory at a2000000 (32-bit, non-prefetchable) [size=16M]
Memory at 90000000 (64-bit, prefetchable) [size=256M]
Memory at a0000000 (64-bit, prefetchable) [size=32M]
I/O ports at 4000 [size=128]
[virtual] Expansion ROM at a3000000 [disabled] [size=512K]
Capabilities: <access denied>
Kernel driver in use: nvidia
Kernel modules: nvidiafb, nouveau, nvidia_drm, nvidia
01:00.1 Audio device: NVIDIA Corporation GP107GL High Definition Audio Controller (rev a1)
Flags: bus master, fast devsel, latency 0, IRQ 17
Memory at a3080000 (32-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel
02:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd Device a809 (prog-if 02 [NVM Express])
Subsystem: Samsung Electronics Co Ltd Device a801
Flags: bus master, fast devsel, latency 0, IRQ 16, NUMA node 0
Memory at a5200000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: nvme
Kernel modules: nvme
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15)
Subsystem: Dell RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
Flags: bus master, fast devsel, latency 0, IRQ 17
I/O ports at 3000 [size=256]
Memory at a5104000 (64-bit, non-prefetchable) [size=4K]
Memory at a5100000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: r8169
Kernel modules: r8169
答案1
从这里，你可以尝试编辑 alsa-base.conf：
sudo gedit /etc/modprobe.d/alsa-base.conf
将以下行添加到此文件末尾：
options snd-hda-intel dmic_detect=0
重启