• Installed kernel 5.4.0-25-generic that you provided. The command dpkg -i gave an error about missing headers.
• Comment out dsp_driver=1. Restart.
• Despite some error about missing headers, Grub menu shows a new entry for kernel 5.4.0-25. I selected it.
• Then I ran alsa-info.
• Installed kernel 5.4.0-25-generic that you provided. The command dpkg -i gave an error about missing headers.
• Comment out dsp_driver=1. Restart.
• Despite some error about missing headers, Grub menu shows a new entry for kernel 5.4.0-25. I selected it.
• Then I ran alsa-info.
Also-info here: http:// alsa-project. org/db/ ?f=93840ffc3499 ac237e28c317fb5 3da3e7c6f14ec