Ubuntu
alsa-driver package

  1. Bug #303789
  2. Comment #6

Comment 6 for bug 303789

Revision history for this message
Sailorman (info-open650) wrote : Re: very quiet sound on notebook IBM r40e

Thank to http://www.thinkwiki.org/wiki/ThinkWiki! I solve this problem!

Solution:

sudo bash
echo level 15 >/proc/acpi/ibm/volume

And this (http://www.thinkwiki.org/wiki/AD1981B) notes:

Note 1

On some models (T40, T43p, ... R51e ...) audio is muted if either Headphone or Line Jack are unmuted. See also ALSA Wiki FAQ [1]. Also, if Headphone Sense or Line Jack Sense are unmuted audio is dead (R52, X40). By default the Sense settings are not shown in GNOME.

Note 2

A bug was introduced in the 2.6.20 kernel (between the rc1 and rc2 releases) which causes the sound to stop working after hibernation. Rebooting does not seem to fix the problem. A quick work-around is to do a suspend-to-ram, and then wake the machine up. This issue is chronicled in this bug report on Launchpad.net: The fix changing HIBERNATE_MODE=shutdown to HIBERNATE_MODE=platform in /etc/default/acpi-support worked very well. I don't know if it possibly could introduce other bugs or if it's a true fix.

https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.20/+bug/80893