Ubuntu 20.4 停止识别音频驱动程序

我有一个集成到主板上的声卡，它与 Ubuntu 20.4 完美配合，直到最近的更新或软件安装（不完全确定是哪一个以及何时发生）：

lspci -v | grep -A7 -i "audio"                                       21ms 
00:1f.3 Audio device: Intel Corporation 200 Series PCH HD Audio
    Subsystem: ASRock Incorporation 200 Series PCH HD Audio
    Flags: bus master, fast devsel, latency 32, IRQ 11
    Memory at df140000 (64-bit, non-prefetchable) [size=16K]
    Memory at df120000 (64-bit, non-prefetchable) [size=64K]
    Capabilities: <access denied>

00:1f.4 SMBus: Intel Corporation 200 Series/Z370 Chipset Family SMBus Controller
    Subsystem: ASRock Incorporation 200 Series/Z370 Chipset Family SMBus Controller
--
01:00.1 Audio device: NVIDIA Corporation GP108 High Definition Audio Controller (rev a1)
    Subsystem: NVIDIA Corporation GP108 High Definition Audio Controller
    Flags: bus master, fast devsel, latency 0, IRQ 10
    Memory at df080000 (32-bit, non-prefetchable) [size=16K]
    Capabilities: <access denied>

我最终得到Dummy Output并遵循了官方的声音故障排除指南。看来 Ubuntu 不知何故丢失了它的驱动程序：

System:    Host: ubuntu Kernel: 5.8.0-40-generic x86_64 bits: 64 Desktop: Gnome 3.36.4 
           Distro: Ubuntu 20.04.1 LTS (Focal Fossa) 
Audio:     Device-1: Intel 200 Series PCH HD Audio driver: N/A 
           Device-2: NVIDIA GP108 High Definition Audio driver: N/A 

和

sudo aplay -l                                                        21ms 
aplay: device_list:274: no soundcards found...

按照同一指南的第 5 步，我得到了：

find /lib/modules/`uname -r` | grep snd                               5ms 
/lib/modules/5.8.0-40-generic/kernel/sound/core/snd-rawmidi.ko
/lib/modules/5.8.0-40-generic/kernel/sound/core/snd-hrtimer.ko
/lib/modules/5.8.0-40-generic/kernel/sound/core/snd-pcm.ko
/lib/modules/5.8.0-40-generic/kernel/sound/core/snd-hwdep.ko
/lib/modules/5.8.0-40-generic/kernel/sound/core/snd-timer.ko
/lib/modules/5.8.0-40-generic/kernel/sound/core/seq/snd-seq-virmidi.ko
/lib/modules/5.8.0-40-generic/kernel/sound/core/seq/snd-seq-dummy.ko
/lib/modules/5.8.0-40-generic/kernel/sound/core/seq/snd-seq.ko
/lib/modules/5.8.0-40-generic/kernel/sound/core/seq/snd-seq-midi-event.ko
/lib/modules/5.8.0-40-generic/kernel/sound/core/seq/snd-seq-midi-emul.ko
/lib/modules/5.8.0-40-generic/kernel/sound/core/seq/snd-seq-midi.ko
/lib/modules/5.8.0-40-generic/kernel/sound/core/snd-seq-device.ko
/lib/modules/5.8.0-40-generic/kernel/sound/core/snd-pcm-dmaengine.ko
/lib/modules/5.8.0-40-generic/kernel/sound/core/snd-compress.ko
/lib/modules/5.8.0-40-generic/kernel/sound/core/snd.ko
/lib/modules/5.8.0-40-generic/kernel/sound/drivers/pcsp/snd-pcsp.ko
/lib/modules/5.8.0-40-generic/kernel/sound/pci/snd-ens1370.ko

遗憾的是，尽管更新了所有软件包，指南中的下一步还是失败了：

sudo apt-get install linux-restricted-modules-`uname -r` linux-generic                                           6ms 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package linux-restricted-modules-5.8.0-40-generic
E: Couldn't find any package by glob 'linux-restricted-modules-5.8.0-40-generic'
E: Couldn't find any package by regex 'linux-restricted-modules-5.8.0-40-generic'

唯一可能类似的报告问题集成声卡不起作用 Ubuntu 20.04 9 个月没有活动。