Hi All,
I have a problem I think caused by ALSA. But first the facts.
My box runs Gentoo Linux, kernel 2.6.25-gentoo-r7, amd64, on a Gigabyte
board with the following sound hardware (excerpt from lspci -vv):
00:14.2 Audio device: ATI Technologies Inc SB600 Azalia
Subsystem: Giga-byte Technology Device a002
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: 32, Cache Line Size: 4 bytes
Interrupt: pin ? routed to IRQ 16
Region 0: Memory at fe024000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [50] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA
PME(D0+,D1-,D2-,D3hot+,D3cold+)
There is a AMD 790X chipset on the board, and a ALC889a codec.
According to 'grep Code /proc/asound/card0/codec\#3'
a 'Codec: Realtek ALC885' is detected.
All software is self compiled, as usual with Gentoo.
I can play .ogg or .mp3 files with audacious, no problem so far, also
viewing/listening to .wmv files or YouTube works.
But when pcm sounds are played from some games i constantly get dropouts
and errors like
snd_pcm_writei failed: Broken pipe
preparing audio device for output
snd_pcm_writei failed: Broken pipe
preparing audio device for output
...
or
snd_pcm_writei failed: Resource temporarily unavailable
snd_pcm_writei failed: Resource temporarily unavailable
snd_pcm_writei failed: Resource temporarily unavailable
snd_pcm_writei failed: Resource temporarily unavailable
snd_pcm_writei short write: 987 out of 1024
snd_pcm_writei failed: Resource temporarily unavailable
snd_pcm_writei failed: Resource temporarily unavailable
idAudioHardwareALSA::Write: 1024 frames overflowed and dropped
snd_pcm_writei short write: 1242 out of 2048
snd_pcm_writei failed: Resource temporarily unavailable
idAudioHardwareALSA::Write: 1024 frames overflowed and dropped
snd_pcm_writei failed: Resource temporarily unavailable
snd_pcm_writei failed: Resource temporarily unavailable
After disabling 'Aggressive power-saving on HD-audio SND_HDA_POWER_SAVE'
and 'AC97 Power-Saving Mode SND_AC97_POWER_SAVE' I got less dropouts,
but they were still noticable.
Last but not least, my alsa is
media-libs/alsa-lib-1.0.16
media-sound/alsa-headers-1.0.16
media-sound/alsa-utils-1.0.16
This are the newest ones marked as stable in portage.
What can I do ? Are there any parameters for the kernel modules, to get
good pcm sound ?
Thanks in advance
PS: I can send a report of alsa-info.sh, if this is helps
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