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#1 2010-12-18 05:27:00

Cheifchimp
Member
From: Queensland Australia
Registered: 2009-05-07
Posts: 69

alternate kernel updates kill/fix audio

For the best part of the last year, I have an annoying problem with kernel updates breaking audio.

one update will break audio - message flashes by, too fast to read, as as xdm starts up but is never logged anywhere that I can find.

the next kernel update fixes the problem and the following update breaks it again and so on.

$ lsmod | grep -i snd
snd_hda_codec_realtek   275887  1 
snd_seq_dummy           1431  0 
snd_seq_oss            28760  0 
snd_seq_midi_event      5436  1 snd_seq_oss
snd_seq                50082  5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
snd_seq_device          5297  3 snd_seq_dummy,snd_seq_oss,snd_seq
snd_pcm_oss            39221  0 
snd_mixer_oss          17106  1 snd_pcm_oss
snd_hda_intel          22285  1 
snd_hda_codec          79384  2 snd_hda_codec_realtek,snd_hda_intel
snd_hwdep               6110  1 snd_hda_codec
snd_pcm                71921  4 cx88_alsa,snd_pcm_oss,snd_hda_intel,snd_hda_codec
snd_timer              19265  2 snd_seq,snd_pcm
snd                    57562  16 cx88_alsa,snd_hda_codec_realtek,snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_mixer_oss,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_timer
soundcore               5969  1 snd
snd_page_alloc          7249  2 snd_hda_intel,snd_pcm
[mick@cave ~]$ 

from dmesg.log
HDA Intel 0000:00:1b.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
HDA Intel 0000:00:1b.0: irq 41 for MSI/MSI-X
HDA Intel 0000:00:1b.0: setting latency timer to 64

cx88_audio 0000:03:01.1: PCI INT A -> GSI 19 (level, low) -> IRQ 19
cx88[0]/1: CX88x/0: ALSA support for cx2388x boards

$ lspci | grep -i audio
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01)
03:01.0 Multimedia video controller: Conexant Systems, Inc. CX23880/1/2/3 PCI Video and Audio Decoder (rev 05)
03:01.1 Multimedia controller: Conexant Systems, Inc. CX23880/1/2/3 PCI Video and Audio Decoder [Audio Port] (rev 05)
03:01.2 Multimedia controller: Conexant Systems, Inc. CX23880/1/2/3 PCI Video and Audio Decoder [MPEG Port] (rev 05)

current broken kernel

$ uname -a
Linux cave 2.6.36-ARCH #1 SMP PREEMPT Fri Dec 10 20:32:37 CET 2010 x86_64 Intel(R) Core(TM)2 Duo CPU E4600 @ 2.40GHz GenuineIntel GNU/Linux

Can anyone point me towards a solution to this issue please
mik

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