Ubuntu 20.04.06部分应用无声音问题求助

各位好，我最近碰到个头疼的问题：Ubuntu 20.04.06系统里，部分应用完全发不出声音。目前出问题的是Snap安装的Slack，还有Telegram的Web-.AppImage版本——奇怪的是，其他同事同样用Ubuntu装Slack却没这个状况，就我这儿卡壳了。

不过也不是所有应用都有问题：Mozilla Firefox浏览器、Snap安装的Spotify，还有本地视频播放器，这些的音频都能正常播放，完全没问题。

我之前搜过类似的问题，比如「No sound in various apps on 19.10」和「No sound playback during call in Slack - Ubuntu 20.04」，但这些帖子里都没找到能解决我问题的有效方案。

下面是我排查时导出的硬件和音频设备信息，供大家参考：

sudo lspci -v 输出： #

0000:00:1f.3 Audio device: Intel Corporation Device 51c8 (rev 01) (prog-if 80)

Subsystem: Dell Device 0b1a

Flags: bus master, fast devsel, latency 64, IRQ 209

Memory at 6189290000 (64-bit, non-prefetchable) [size=16K]

Memory at 6189000000 (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_intel_tgl

aplay --list-devices 输出： #

**** List of PLAYBACK Hardware Devices ****

card 0: PCH [HDA Intel PCH], device 0: ALC289 Analog [ALC289 Analog]

Subdevices: 0/1

Subdevice #0: subdevice #0

card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]

Subdevices: 1/1

Subdevice #0: subdevice #0

card 0: PCH [HDA Intel PCH], device 7: HDMI 1 [HDMI 1]

Subdevices: 1/1

Subdevice #0: subdevice #0

card 0: PCH [HDA Intel PCH], device 8: HDMI 2 [HDMI 2]

Subdevices: 1/1

Subdevice #0: subdevice #0

card 0: PCH [HDA Intel PCH], device 9: HDMI 3 [HDMI 3]

Subdevices: 1/1

Subdevice #0: subdevice #0

card 0: PCH [HDA Intel PCH], device 10: HDMI 4 [HDMI 4]

Subdevices: 1/1

Subdevice #0: subdevice #0

card 0: PCH [HDA Intel PCH], device 11: HDMI 5 [HDMI 5]

Subdevices: 1/1

Subdevice #0: subdevice #0

card 0: PCH [HDA Intel PCH], device 12: HDMI 6 [HDMI 6]

Subdevices: 1/1

Subdevice #0: subdevice #0

card 0: PCH [HDA Intel PCH], device 13: HDMI 7 [HDMI 7]

Subdevices: 1/1

Subdevice #0: subdevice #0

card 0: PCH [HDA Intel PCH], device 14: HDMI 8 [HDMI 8]

Subdevices: 1/1

Subdevice #0: subdevice #0

card 0: PCH [HDA Intel PCH], device 15: HDMI 9 [HDMI 9]

Subdevices: 1/1

Subdevice #0: subdevice #0

card 0: PCH [HDA Intel PCH], device 16: HDMI 10 [HDMI 10]

Subdevices: 1/1

Subdevice #0: subdevice #0

card 0: PCH [HDA Intel PCH], device 17: HDMI 11 [HDMI 11]

Subdevices: 1/1

Subdevice #0: subdevice #0

希望有大佬能帮忙分析下问题出在哪儿，或者给点排查方向，万分感谢！

备注：内容来源于stack exchange，提问作者el_jorgemo