[arch-general] Why does my sound work sometimes & not others?
darose at darose.net
Wed May 13 10:40:34 EDT 2009
David C. Rankin, J.D.,P.E. wrote:
> I have the most atavistic sound known to mankind on my laptop running arch.
> Sometimes it works, sometimes it doesn't. The card specs are:
> 0:14.2 Audio device: ATI Technologies Inc SBx00 Azalia (Intel HDA)
> Subsystem: Toshiba America Info Systems Device ff08
> Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
> Stepping- SERR- FastB2B- DisINTx-
> Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=slow >TAbort-
> <TAbort- <MAbort- >SERR- <PERR- INTx-
> Latency: 64, Cache Line Size: 32 bytes
> Interrupt: pin ? routed to IRQ 16
> Region 0: Memory at f8700000 (64-bit, non-prefetchable) [size=16K]
> Capabilities: <access denied>
> Kernel driver in use: HDA Intel
> Kernel modules: snd-hda-intel
> The Intel modules loaded are:
> snd 65928 13
> snd_hda_codec 68112 2 snd_hda_codec_realtek,snd_hda_intel
> snd_hda_intel 29256 1
> snd_page_alloc 9760 2 snd_hda_intel,snd_pcm
> snd_pcm 80920 3 snd_pcm_oss,snd_hda_intel,snd_hda_codec
> When I first start arch and start kde, everything is fine. However, if I log
> out and then back it, most times the sound is gone -- dead. The sound will
> not start again until I reboot. Anybody got any ideas on what to check or
> what to keep a watch out for? Also, any ideas on how to bring the sound back
> once it dies without having to reboot?
> Thanks for any help you can provide. I always hated chasing sound problems.
snd-hda-intel encompasses many different chipsets/codecs. Which one
does your card use? You can find out like so:
[darose at daroselin ~]$ grep Codec /proc/asound/card0/codec#0
Codec: IDT 92HD71B7X
As far as general things to check/try:
* Try restarting the KDE sound system.
* Try checking to see if anything got muted in the mixer (i.e., check in
Kmix or alsamixer).
* Try seeing if this is a KDE issue or not by hitting ctrl-alt-F1,
logging into a non-X console, and testing the sound using alsaplayer.
* I had a problem with my sound card whereby "analog loopback" was
getting set and muting the sound. (See:
http://bbs.archlinux.org/viewtopic.php?pid=535521#p535521) Tore my hair
out over that one for a LONG time. Maybe this is your issue too?
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