Please check same bug with Acer Aspire 8943G laptop: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/656625 (probably same easy fix can be applied for this laptop).
Please check same bug with Acer Aspire 8943G laptop: https:/ /bugs.launchpad .net/ubuntu/ +source/ alsa-driver/ +bug/656625 (probably same easy fix can be applied for this laptop).