Comment 19 for bug 995684

@ Kazi Shahnoor Ashraf (kaziweb) and xsoul (ivyleexyg) - The following commit in the upstream kernel 3.4 might help you:

author Takashi Iwai
Wed, 11 Apr 2012 15:18:12 +0000 (17:18 +0200)
committer Takashi Iwai
Thu, 12 Apr 2012 05:58:19 +0000 (07:58 +0200)
commit 038d4fef376bc494d4f11072d2ab248414b7d568
tree 016c2c4d6c11c136ca90285816da5f4732c8f8cd
parent 912093bc7c08f59e97faed2c0269e1e5429dcd58

ALSA: hda/realtek - Fix GPIO1 setup for Acer Aspire 4930 & co

Add GPIO1 setup explicitly for Acer Aspire 493x & co.
This could be set by alc_auto_init_amp(), but it's safer to set it
more explicitly in the fixup table.

Signed-off-by: Takashi Iwai

The upcoming Ubuntu 12.10 "Quantal Quetzal" is based on the upstream 3.5 kernel and should contain this patch. Please advise whether or not this problem still occurs on Ubuntu 12.10 beta 2, which is currently available from www.ubuntu.com/testing