Ubuntu
alsa-driver package

  1. Bug #1845797
  2. Comment #40

Comment 40 for bug 1845797

Revision history for this message
In , pfpschneider (pfpschneider-linux-kernel-bugs) wrote :

The mic problem should be addressed by upgrades to the sof drivers. You may have to get some sort of quirk added for the C930.

The speaker problem is very likely an amp that is not turned on. See https://bugzilla.kernel.org/show_bug.cgi?id=205755 for more information and a partial fix for 14" C940s. The BIOS upgrade doesn't work for C930s. See the referenced thread on the Lenovo site.