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> Kernel-2.6.32-220.2.1.el6.x86_64 kills audio on Intel N10/ICH 7 audio controller
redman
 Posted: Dec 31 2011, 07:38 PM
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Today I noticed that the integrated soundcard on my Asus P5G41TD-M PRO motherboard didn't produce any sound anymore. It stopped after I installed the latest kernel (2.6.32-220.2.1.el6.x86_64).
When I boot the system with the 2.6.32-131.21.1.el6.x86_64 kernel the audio works flawless.

The machine in question is used as musicbox, so nothing critical.
Will dive in when I have the a bit more time.
Just posting here in case someone might run in the same problem.


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Desktop: ASUS P5QPL-AM, Intel Dual-Core E6500, 4GB DDR2, ASUS GeForce GT 430 1GB, SL6.6 x86_64
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joutlan
 Posted: Dec 31 2011, 10:06 PM
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It also killed my wireless on my Vostro 3550 with intel 6230....odd....I'm putting Sabayon KDE on it anyway.

The kernel update on my Precision was without issue (intel 6300)


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redman
 Posted: Jan 1 2012, 02:07 PM
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QUOTE (redman @ Dec 31 2011, 09:38 PM)
Today I noticed that the integrated soundcard on my Asus P5G41TD-M PRO motherboard didn't produce any sound anymore. It stopped after I installed the latest kernel (2.6.32-220.2.1.el6.x86_64).

After doing some searching I solved the problem.

According to ASUS, the motherboard has an ALC887 8-Channel High-Definition audiocontroller.
I checked which codec the system would use:

# lsmod | grep snd
QUOTE
snd_hda_intel          25548  5
snd_hda_codec          91845  1 snd_hda_intel
snd_hwdep              6780  1 snd_hda_codec
snd_seq                56591  0
snd_seq_device          6596  1 snd_seq
snd_pcm                84702  3 snd_hda_intel,snd_hda_codec
snd_timer              23057  2 snd_seq,snd_pcm
snd                    70023  16 snd_hda_intel,snd_hda_codec,snd_hwdep,snd_seq,snd_seq_device,snd_pcm,snd_timer
soundcore              8086  1 snd
snd_page_alloc          8630  2 snd_hda_intel,snd_pcm


Next I created /etc/modprobe.conf and added "options snd-hda-intel model=generic".
When I rebooted the system sound worked again.


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What is SL? - Forum Rules - Info on 3rd Party Repos

Desktop: ASUS P5QPL-AM, Intel Dual-Core E6500, 4GB DDR2, ASUS GeForce GT 430 1GB, SL6.6 x86_64
Build server: HP Proliant ML350 G5, 1x Intel Xeon Quad-Core E5410, 9GB ECC DDR2 FB-DIMM, ASUS GeForce GT 730 1GB, SL6.6 x86_64
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joka
 Posted: Jan 1 2012, 06:45 PM
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On Asus netbooks EeePC 901 and similar models it is even worse: kernel is crashing very early during booting. It has been reported to CentOS 6 and RHEL 6, therefore it appears to be an upstream bug:

CentOS 6: http://bugs.centos.org/view.php?id=5368
RHEL 6: https://bugzilla.redhat.com/show_bug.cgi?id=770403

The CentOS bug report describes precisely my problem.
Adding "options snd-hda-intel model=generic" to /etc/modprobe.conf helps to boot this kernel but at the cost that there's no sound and other issues (e.g. no wireless). Similar possibility is to blacklist snd_hda_codec_realtek. The best is to stay with kernel 2.6.32-131.21.1.

No problems with this kernel on MacBook 2,1.
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