I have a similar problem. There was an email thread about it a few months
ago. Nothing much happened with it because sound occasionally works for me.
Sometime it comes back after a reboot or restart of alsasound, and sometimes if
I leave the machine running a long time if will just start working or just stop
working . . . really weird. I've been running alsaconf a lot and that seem to
get it back most of the time if not I still need to restart alsasound or
reboot.Also, if you haven't run python-updater in a while you should, that
seems to fix a lot a odd behavior.Good luck.dhk- Original Message
-From: Florian Philipp Date: Friday, April 22, 2011 10:45 amSubject:
[gentoo-user] HDA ATI SB ALC892 sometimes no soundTo: Gentoo User List Hi
list! I've recently bought a Gigabyte GA-880GMA-UD2H board (AM3, integrated
Radeon HD 4200). The problem is, sometimes sound works out-of- the-box. Then
I reboot and there is no sound at all. There is no error - just no output.
The SPDIF port (which I really need) does not emit any light, then. Sometimes
after a cold reboot, it works again. I've found several threads pointing to
problems with kernel 2.6.32 (solved in 2.6.33, I'm on 2.6.36). Some others
made me wonder if alsa is confused by the HDMI output of the graphics card.
I blacklisted snd_hda_codec_atihdmi and switched driver from fglrx to radeon
but it did not change anything. I don't have the means to check whether there
is any output over HDMI. I know that at least Volker has a similar board.
Maybe others as well. Does someone have a clue what's going on? I'll append
some info. # aplay -l List of PLAYBACK Hardware Devices card 0:
SB [HDA ATI SB], device 0: ALC892 Analog [ALC892 Analog] Subdevices: 1/1
Subdevice #0: subdevice #0 card 0: SB [HDA ATI SB], device 1: ALC892 Digital
[ALC892 Digital] Subdevices: 1/1 Subdevice #0: subdevice #0 card 1: HDMI
[HDA ATI HDMI], device 3: ATI HDMI [ATI HDMI] Subdevices: 1/1 Subdevice #0:
subdevice #0 # aplay -L nullDiscard all samples (playback) or generate
zero samples (capture) default:CARD=SBHDA ATI SB, ALC892 Analog
Default Audio Device front:CARD=SB,DEV=0HDA ATI SB, ALC892 Analog
Front speakers surround40:CARD=SB,DEV=0HDA ATI SB, ALC892 Analog4.0
Surround output to Front and Rear speakers surround41:CARD=SB,DEV=0HDA
ATI SB, ALC892 Analog4.1 Surround output to Front, Rear and Subwoofer
speakers surround50:CARD=SB,DEV=0HDA ATI SB, ALC892 Analog5.0
Surround output to Front, Center and Rear speakers surround51:CARD=SB,DEV=0
HDA ATI SB, ALC892 Analog5.1 Surround output to Front, Center, Rear and
Subwoofer speakers surround71:CARD=SB,DEV=0HDA ATI SB, ALC892 Analog
7.1 Surround output to Front, Center, Side, Rear and Woofer
speakersiec958:CARD=SB,DEV=0HDA ATI SB, ALC892 DigitalIEC958 (S/PDIF)
Digital Audio Output hdmi:CARD=HDMIHDA ATI HDMI, ATI HDMIHDMI Audio
Output # lsmod | grep snd snd_pcm_oss35117 0 snd_mixer_oss
14707 1 snd_pcm_oss snd_seq_oss27452 0 snd_seq_midi_event
5188 1 snd_seq_oss snd_seq48669 4
snd_seq_oss,snd_seq_midi_event snd_seq_device 4861 2
snd_seq_oss,snd_seq snd_hda_codec_atihdmi 2331 1 snd_hda_codec_realtek
267272 1 snd_hda_intel 19922 0 snd_hda_codec 61484 3
snd_hda_codec_atihdmi,snd_hda_codec_realtek,snd_hda_intel snd_pcm
63804 3 snd_pcm_oss,snd_hda_intel,snd_hda_codecsnd_timer
17965 2 snd_seq,snd_pcm snd50622 10
snd_pcm_oss,snd_mixer_oss,snd_seq_oss,snd_seq,snd_seq_device,snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_pcm,snd_timer
soundcore 5007 1 snd snd_page_alloc 6713 2
snd_hda_intel,snd_pcm # dmesg | grep -i hda HDA Intel :00:14.2: PCI INT
A - GSI 16 (level, low) - IRQ 16 hda_codec: ALC892: BIOS auto-probing. HDA
Intel :01:05.1: PCI INT B - GSI 19 (level, low) - IRQ 19 HDA Intel
:01:05.1: setting latency timer to 64 # lspci -v 00:14.2 Audio device:
ATI Technologies Inc SBx00 Azalia (Intel HDA) (rev 40)Subsystem:
Giga-byte Technology Device a102Flags: bus master, slow devsel,
latency 32, IRQ 16Memory at fe024000 (64-bit, non-prefetchable)
[size=16K]Capabilities: [50] Power Management version 2Kernel
driver in use: HDA IntelKernel modules: snd-hda-intel 01:05.0 VGA
compatible controller: ATI Technologies Inc Device 9715 (prog-if 00 [VGA
controller])Subsystem: Giga-byte Technology Device d000Flags:
bus master, fast devsel, latency 0, IRQ 18Memory at d000 (32-bit,
prefetchable) [size=256M]I/O ports at de00 [size=256]Memory
at fdee (32-bit, non-prefetchable) [size=64K]Memory at fdd0
(32-bit, non-prefetchable) [size=1M]Expansion ROM at [disabled]
Capabilities: [50]
