Thank you for reporting this bug to Ubuntu.
Ubuntu 12.04 (precise) reached end-of-life on April 28, 2017.
See this document for currently supported Ubuntu releases:
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We appreciate that this bug may be old and you might not be interested
in discussing it any more.
With newer kernel versions, that bug didn't show up anymore, so I guess,
that bug should be closed.
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https://bugs.launchpad.net/bugs/945980
Title:
[1000H, Realtek ALC269, Speaker, Inter
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https://bugs.launchpad.net/bugs/945980
Title:
[1000H, Realtek ALC269, Speaker, Internal] No sound at all
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