我已经将 Ubuntu 升级到 20.04 一段时间了，今天突然在开会时没有声音了。我尝试了所有方法，但都不起作用。当我插入耳机时，声音正常。我与 Windows 10 进行了双启动，声音正常。我的笔记本电脑是联想 Legion y730。
以下是我尝试过的一些输出示例：
$ sudo lspci
00:00.0 Host bridge: Intel Corporation 8th Gen Core Processor Host Bridge/DRAM Registers (rev 07)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor PCIe Controller (x16) (rev 07)
00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 630 (Mobile)
00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 07)
00:08.0 System peripheral: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th/8th Gen Core Processor Gaussian Mixture Model
00:12.0 Signal processing controller: Intel Corporation Cannon Lake PCH Thermal Controller (rev 10)
00:14.0 USB controller: Intel Corporation Cannon Lake PCH USB 3.1 xHCI Host Controller (rev 10)
00:14.2 RAM memory: Intel Corporation Cannon Lake PCH Shared SRAM (rev 10)
00:14.3 Network controller: Intel Corporation Wireless-AC 9560 [Jefferson Peak] (rev 10)
00:15.0 Serial bus controller [0c80]: Intel Corporation Cannon Lake PCH Serial IO I2C Controller #0 (rev 10)
00:15.1 Serial bus controller [0c80]: Intel Corporation Cannon Lake PCH Serial IO I2C Controller #1 (rev 10)
00:16.0 Communication controller: Intel Corporation Cannon Lake PCH HECI Controller (rev 10)
00:17.0 SATA controller: Intel Corporation Cannon Lake Mobile PCH SATA AHCI Controller (rev 10)
00:1b.0 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port #17 (rev f0)
00:1b.4 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port #21 (rev f0)
00:1d.0 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port #13 (rev f0)
00:1e.0 Communication controller: Intel Corporation Cannon Lake PCH Serial IO UART Host Controller (rev 10)
00:1f.0 ISA bridge: Intel Corporation HM470 Chipset LPC/eSPI Controller (rev 10)
00:1f.3 Audio device: Intel Corporation Cannon Lake PCH cAVS (rev 10)
00:1f.4 SMBus: Intel Corporation Cannon Lake PCH SMBus Controller (rev 10)
00:1f.5 Serial bus controller [0c80]: Intel Corporation Cannon Lake PCH SPI Controller (rev 10)
01:00.0 3D controller: NVIDIA Corporation GP107M [GeForce GTX 1050 Ti Mobile] (rev a1)
01:00.1 Audio device: NVIDIA Corporation GP107GL High Definition Audio Controller (rev a1)
3e:00.0 Non-Volatile memory controller: Micron/Crucial Technology P1 NVMe PCIe SSD (rev 03)
3f:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15)
$ sudo lspci -v
00:00.0 Host bridge: Intel Corporation 8th Gen Core Processor Host Bridge/DRAM Registers (rev 07)
Subsystem: Lenovo 8th Gen Core Processor Host Bridge/DRAM Registers
Flags: bus master, fast devsel, latency 0
Capabilities: [e0] Vendor Specific Information: Len=10 <?>
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=05, sec-latency=0
I/O behind bridge: 00004000-00004fff [size=4K]
Memory behind bridge: 62000000-630fffff [size=17M]
Prefetchable memory behind bridge: 0000000050000000-0000000061ffffff [size=288M]
Capabilities: [88] Subsystem: Lenovo Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor PCIe Controller (x16)
Capabilities: [80] Power Management version 3
Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [a0] Express Root Port (Slot+), MSI 00
Capabilities: [100] Virtual Channel
Capabilities: [140] Root Complex Link
Capabilities: [d94] Secondary PCI Express
Kernel driver in use: pcieport
00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 630 (Mobile) (prog-if 00 [VGA controller])
Subsystem: Lenovo UHD Graphics 630 (Mobile)
Flags: bus master, fast devsel, latency 0, IRQ 158
Memory at 6022000000 (64-bit, non-prefetchable) [size=16M]
Memory at 4000000000 (64-bit, prefetchable) [size=256M]
I/O ports at 5000 [size=64]
Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
Capabilities: [40] Vendor Specific Information: Len=0c <?>
Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
Capabilities: [ac] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [d0] Power Management version 2
Capabilities: [100] Process Address Space ID (PASID)
Capabilities: [200] Address Translation Service (ATS)
Capabilities: [300] Page Request Interface (PRI)
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: Lenovo Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at 6023100000 (64-bit, non-prefetchable) [size=32K]
Capabilities: [90] MSI: Enable- Count=1/1 Maskable- 64bit-
Capabilities: [d0] Power Management version 3
Capabilities: [e0] Vendor Specific Information: Len=0c <?>
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/8th Gen Core Processor Gaussian Mixture Model
Subsystem: Lenovo Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th/8th Gen Core Processor Gaussian Mixture Model
Flags: bus master, fast devsel, latency 0, IRQ 255
Memory at 6023119000 (64-bit, non-prefetchable) [size=4K]
Capabilities: [90] MSI: Enable- Count=1/1 Maskable- 64bit-
Capabilities: [dc] Power Management version 2
Capabilities: [f0] PCI Advanced Features
00:12.0 Signal processing controller: Intel Corporation Cannon Lake PCH Thermal Controller (rev 10) Subsystem: Lenovo Cannon Lake PCH Thermal Controller
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at 6023118000 (64-bit, non-prefetchable) [size=4K]
Capabilities: [50] Power Management version 3
Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit-
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: Lenovo Cannon Lake PCH USB 3.1 xHCI Host Controller
Flags: bus master, medium devsel, latency 0, IRQ 126
Memory at 63300000 (64-bit, non-prefetchable) [size=64K]
Capabilities: [70] Power Management version 2
Capabilities: [80] MSI: Enable+ Count=1/8 Maskable- 64bit+
Capabilities: [90] Vendor Specific Information: Len=14 <?>
Kernel driver in use: xhci_hcd
00:14.2 RAM memory: Intel Corporation Cannon Lake PCH Shared SRAM (rev 10)
Subsystem: Lenovo Cannon Lake PCH Shared SRAM
Flags: bus master, fast devsel, latency 0
Memory at 6023110000 (64-bit, non-prefetchable) [size=8K]
Memory at 6023117000 (64-bit, non-prefetchable) [size=4K]
Capabilities: [80] Power Management version 3
00:14.3 Network controller: Intel Corporation Wireless-AC 9560 [Jefferson Peak] (rev 10)
Subsystem: Intel Corporation Wireless-AC 9560 [Jefferson Peak]
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at 602310c000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [c8] Power Management version 3
Capabilities: [d0] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [40] Express Root Complex Integrated Endpoint, MSI 00
Capabilities: [80] MSI-X: Enable+ Count=16 Masked-
Capabilities: [100] Null
Capabilities: [14c] Latency Tolerance Reporting
Capabilities: [164] Vendor Specific Information: ID=0010 Rev=0 Len=014 <?>
Kernel driver in use: iwlwifi
Kernel modules: iwlwifi
00:15.0 Serial bus controller [0c80]: Intel Corporation Cannon Lake PCH Serial IO I2C Controller #0 (rev 10)
Subsystem: Lenovo Cannon Lake PCH Serial IO I2C Controller
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at 4010000000 (64-bit, non-prefetchable) [virtual] [size=4K]
Capabilities: [80] Power Management version 3
Capabilities: [90] Vendor Specific Information: Len=14 <?>
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:15.1 Serial bus controller [0c80]: Intel Corporation Cannon Lake PCH Serial IO I2C Controller #1 (rev 10)
Subsystem: Lenovo Cannon Lake PCH Serial IO I2C Controller
Flags: bus master, fast devsel, latency 0, IRQ 17
Memory at 4010001000 (64-bit, non-prefetchable) [virtual] [size=4K]
Capabilities: [80] Power Management version 3
Capabilities: [90] Vendor Specific Information: Len=14 <?>
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: Lenovo Cannon Lake PCH HECI Controller
Flags: bus master, fast devsel, latency 0, IRQ 143
Memory at 6023114000 (64-bit, non-prefetchable) [size=4K]
Capabilities: [50] Power Management version 3
Capabilities: [8c] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [a4] Vendor Specific Information: Len=14 <?>
Kernel driver in use: mei_me
Kernel modules: mei_me
00:17.0 SATA controller: Intel Corporation Cannon Lake Mobile PCH SATA AHCI Controller (rev 10) (prog-if 01 [AHCI 1.0])
Subsystem: Lenovo Cannon Lake Mobile PCH SATA AHCI Controller
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 127
Memory at 63310000 (32-bit, non-prefetchable) [size=8K]
Memory at 63314000 (32-bit, non-prefetchable) [size=256]
I/O ports at 5080 [size=8]
I/O ports at 5088 [size=4]
I/O ports at 5060 [size=32]
Memory at 63313000 (32-bit, non-prefetchable) [size=2K]
Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [70] Power Management version 3
Capabilities: [a8] SATA HBA v1.0
Kernel driver in use: ahci
Kernel modules: ahci
00:1b.0 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port #17 (rev f0) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 123
Bus: primary=00, secondary=06, subordinate=3d, sec-latency=0
I/O behind bridge: 00006000-00008fff [size=12K]
Memory behind bridge: 64000000-7a0fffff [size=353M]
Prefetchable memory behind bridge: 0000006000000000-0000006021ffffff [size=544M]
Capabilities: [40] Express Root Port (Slot+), MSI 00
Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [90] Subsystem: Lenovo Cannon Lake PCH PCI Express Root Port
Capabilities: [a0] Power Management version 3
Capabilities: [100] Null
Capabilities: [140] Access Control Services
Capabilities: [150] Precision Time Measurement
Capabilities: [220] Secondary PCI Express
Capabilities: [250] Downstream Port Containment
Kernel driver in use: pcieport
00:1b.4 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port #21 (rev f0) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 124
Bus: primary=00, secondary=3e, subordinate=3e, sec-latency=0
I/O behind bridge: [disabled]
Memory behind bridge: 63200000-632fffff [size=1M]
Prefetchable memory behind bridge: [disabled]
Capabilities: [40] Express Root Port (Slot+), MSI 00
Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [90] Subsystem: Lenovo Cannon Lake PCH PCI Express Root Port
Capabilities: [a0] Power Management version 3
Capabilities: [100] Advanced Error Reporting
Capabilities: [140] Access Control Services
Capabilities: [150] Precision Time Measurement
Capabilities: [200] L1 PM Substates
Capabilities: [220] Secondary PCI Express
Capabilities: [250] Downstream Port Containment
Kernel driver in use: pcieport
00:1d.0 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port #13 (rev f0) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 125
Bus: primary=00, secondary=3f, subordinate=3f, sec-latency=0
I/O behind bridge: 00003000-00003fff [size=4K]
Memory behind bridge: 63100000-631fffff [size=1M]
Prefetchable memory behind bridge: [disabled]
Capabilities: [40] Express Root Port (Slot+), MSI 00
Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [90] Subsystem: Lenovo Cannon Lake PCH PCI Express Root Port
Capabilities: [a0] Power Management version 3
Capabilities: [100] Advanced Error Reporting
Capabilities: [140] Access Control Services
Capabilities: [150] Precision Time Measurement
Capabilities: [200] L1 PM Substates
Capabilities: [220] Secondary PCI Express
Capabilities: [250] Downstream Port Containment
Kernel driver in use: pcieport
00:1e.0 Communication controller: Intel Corporation Cannon Lake PCH Serial IO UART Host Controller (rev 10)
Subsystem: Lenovo Cannon Lake PCH Serial IO UART Host Controller
Flags: bus master, fast devsel, latency 0, IRQ 20
Memory at 4010002000 (64-bit, non-prefetchable) [virtual] [size=4K]
Capabilities: [80] Power Management version 3
Capabilities: [90] Vendor Specific Information: Len=14 <?>
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:1f.0 ISA bridge: Intel Corporation HM470 Chipset LPC/eSPI Controller (rev 10)
Subsystem: Lenovo Device 3802
Flags: bus master, medium devsel, latency 0
00:1f.3 Audio device: Intel Corporation Cannon Lake PCH cAVS (rev 10)
Subsystem: Lenovo Cannon Lake PCH cAVS
Flags: bus master, fast devsel, latency 32, IRQ 159
Memory at 6023108000 (64-bit, non-prefetchable) [size=16K]
Memory at 6023000000 (64-bit, non-prefetchable) [size=1M]
Capabilities: [50] Power Management version 3
Capabilities: [80] Vendor Specific Information: Len=14 <?>
Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel, snd_sof_pci
00:1f.4 SMBus: Intel Corporation Cannon Lake PCH SMBus Controller (rev 10)
Subsystem: Lenovo Cannon Lake PCH SMBus Controller
Flags: medium devsel, IRQ 16
Memory at 6023112000 (64-bit, non-prefetchable) [size=256]
I/O ports at 5040 [size=32]
Kernel driver in use: i801_smbus
Kernel modules: i2c_i801
00:1f.5 Serial bus controller [0c80]: Intel Corporation Cannon Lake PCH SPI Controller (rev 10)
Subsystem: Lenovo Cannon Lake PCH SPI Controller
Flags: bus master, fast devsel, latency 0
Memory at fe010000 (32-bit, non-prefetchable) [size=4K]
01:00.0 3D controller: NVIDIA Corporation GP107M [GeForce GTX 1050 Ti Mobile] (rev a1)
Subsystem: Lenovo GP107M [GeForce GTX 1050 Ti Mobile]
Flags: bus master, fast devsel, latency 0, IRQ 255
Memory at 62000000 (32-bit, non-prefetchable) [size=16M]
Memory at 50000000 (64-bit, prefetchable) [size=256M]
Memory at 60000000 (64-bit, prefetchable) [size=32M]
I/O ports at 4000 [disabled] [size=128]
Expansion ROM at 63080000 [disabled] [size=512K]
Capabilities: [60] Power Management version 3
Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [78] Express Endpoint, MSI 00
Capabilities: [100] Virtual Channel
Capabilities: [250] Latency Tolerance Reporting
Capabilities: [258] L1 PM Substates
Capabilities: [128] Power Budgeting <?>
Capabilities: [420] Advanced Error Reporting
Capabilities: [600] Vendor Specific Information: ID=0001 Rev=1 Len=024 <?>
Capabilities: [900] Secondary PCI Express
Kernel modules: nvidiafb, nouveau
01:00.1 Audio device: NVIDIA Corporation GP107GL High Definition Audio Controller (rev a1)
Subsystem: Lenovo GP107GL High Definition Audio Controller
Flags: bus master, fast devsel, latency 0, IRQ 17
Memory at 63000000 (32-bit, non-prefetchable) [size=16K]
Capabilities: [60] Power Management version 3
Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [78] Express Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel
3e:00.0 Non-Volatile memory controller: Micron/Crucial Technology P1 NVMe PCIe SSD (rev 03) (prog-if 02 [NVM Express])
Subsystem: Micron/Crucial Technology P1 NVMe PCIe SSD
Flags: bus master, fast devsel, latency 0, IRQ 16, NUMA node 0
Memory at 63200000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [40] Power Management version 3
Capabilities: [50] MSI: Enable- Count=1/8 Maskable+ 64bit+
Capabilities: [70] Express Endpoint, MSI 00
Capabilities: [b0] MSI-X: Enable+ Count=16 Masked-
Capabilities: [100] Advanced Error Reporting
Capabilities: [158] Secondary PCI Express
Capabilities: [178] Latency Tolerance Reporting
Capabilities: [180] L1 PM Substates
Kernel driver in use: nvme
Kernel modules: nvme
3f:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15)
Subsystem: Lenovo RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
Flags: bus master, fast devsel, latency 0, IRQ 16
I/O ports at 3000 [size=256]
Memory at 63104000 (64-bit, non-prefetchable) [size=4K]
Memory at 63100000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [40] Power Management version 3
Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [70] Express Endpoint, MSI 01
Capabilities: [b0] MSI-X: Enable+ Count=4 Masked-
Capabilities: [100] Advanced Error Reporting
Capabilities: [140] Virtual Channel
Capabilities: [160] Device Serial Number 01-00-00-00-68-4c-e0-00
Capabilities: [170] Latency Tolerance Reporting
Capabilities: [178] L1 PM Substates
Kernel driver in use: r8169
Kernel modules: r8169
$ sudo lshw -C multimedia
*-multimedia
description: Audio device
product: GP107GL High Definition Audio Controller
vendor: NVIDIA Corporation
physical id: 0.1
bus info: pci@0000:01:00.1
version: a1
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=snd_hda_intel latency=0
resources: irq:17 memory:63000000-63003fff
*-usb:3
description: Video
product: Integrated Camera
vendor: Chicony Electronics Co.,Ltd.
physical id: 7
bus info: usb@1:7
version: 0.27
serial: 0001
capabilities: usb-2.01
configuration: driver=uvcvideo maxpower=500mA speed=480Mbit/s
*-multimedia
description: Audio device
product: Cannon Lake PCH cAVS
vendor: Intel Corporation
physical id: 1f.3
bus info: pci@0000:00:1f.3
version: 10
width: 64 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list
configuration: driver=snd_hda_intel latency=32
resources: iomemory:600-5ff iomemory:600-5ff irq:159 memory:6023108000-602310bfff memory:6023000000-60230fffff
$ uname -a
Linux mosama 5.4.0-42-generic #46-Ubuntu SMP Fri Jul 10 00:24:02 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
我也尝试过清除 alsa-base 和 pulseaudio 然后重新安装它。
扬声器似乎像屏幕截图中那样工作，但我听不到任何声音。
答案1
进入终端上的 alsamixer 窗口，取消所有选项的静音，并更改所有选项的音量。我之前也遇到过类似的问题
答案2
我更新到 20.04 时也遇到了类似的问题并报告了该错误。最后这个 ppa 解决了我的问题。 https://launchpad.net/~kaihengfeng/+archive/ubuntu/fix-lp1869819