Ubuntu
alsa-driver package

  1. Bug #1845797
  2. Comment #44

Comment 44 for bug 1845797

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

The problem is that the BIOS doesn't activate the amplifiers on the bottom of the body. Someone sent in an unofficial BIOS for the C940 that fixes the problem for the C940 only. See https://bugzilla.kernel.org/show_bug.cgi?id=205755

There is a related problem with the 9i that has a proposed fix that appears to work. See https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1926165 This fix may not be enough for the C930 and C940 but it might be possible to get a fix for them that doesn't require a non-official BIOS.

By the way, I don't think that any of these laptops have five-channel sound. There is the soundbar with two or three speakers and the two lower-range (I hesitate to call them bass) speakers on the bottom of the laptop. I don't expect that sound under Linux is as good as sound under Windows as I believe Windows has a Dolby ATMOS sound driver for these laptops that probably does some special equalization.

The microphone should work in modern kernels. I'm running Fedora 5.11.20 but I think the microphone was fine throughout the 5.10 kernel and maybe even earlier.