No sound - Ubuntu Mate 21.04 + Chromebook
When I open sound settings, No profile options are listed for "Built-in audio" except for "Off".
Machine is a Acer Chromebook Spin 713 with MrChromeBox coreboot firmware and Ubuntu MATE 21.04 installed (however, issue also exists with Lubuntu 20.04.3). Laptop has built-in speakers and a 3.5mm audio jack, but does not recognize any playback audio devices except HDMI.
Sound Device: 00:1f.3 Multimedia audio controller: Intel Corporation Comet Lake PCH-LP cAVS DeviceName: Multimedia audio controller Subsystem: Intel Corporation Comet Lake PCH-LP cAVS Flags: bus master, fast devsel, latency 64, IRQ 148 Memory at 9fa14000 (64-bit, non-prefetchable) [size=16K] Memory at 9f900000 (64-bit, non-prefetchable) [size=1M] Capabilities: Kernel driver in use: snd_hda_intel Kernel modules: snd_hda_intel, snd_sof_pci
alsa-info output:
Note: I have made one modification to /etc/modprobe.d/alsa-base.conf, adding the following line: "options snd-hda-intel dmic-detect=0" Before this, the laptop's sound card was not being recognized at all.
alsa-info output from before:
2 Reset to default
