Ubuntu 7.10/Issues/Sound Muted After Resume

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Description: Audio is muted after resuming from Suspend or Hibernate.
Systems Affected: Inspiron 1525n.
Impact: No sound after resume from Suspend or Hibernate.
Workaround: Slide volume up by using the Gnome volume slider or the laptop's volume control keys.
Fix: Download Dell's custom linux-backports-modules (l-b-m) package linux-backports-modules-2.6.22-14-generic_2.6.22-14.53_i386.deb. This custom l-b-m is not available on any of the Ubuntu repositories, it is only available here.

To install, run: 

$ sudo dpkg -i linux-backports-modules-2.6.22-14-generic_2.6.22-14.53_i386.deb

And reboot your system: 

$ sudo reboot

NOTE: In some cases, after rebooting, the laptop's volume control buttons and the gnome volume slider will no longer control the builtin speaker's volume.

To fix the system's volume control buttons, run: 

$ gnome-sound-properties

in "Default Mixer Tracks", select PCM:

sound_preferences.png

To fix the gnome volume slider, right-click over the volume icon on the top right corner of your screen, select Preferences and then select PCM:

volume_control_preferences.png

Retrieved from "http://linux.dell.com/wiki/index.php/Ubuntu_7.10/Issues/Sound_Muted_After_Resume"
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