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Re: Crackling sound in games, pulseaudio CPU usage high (F10)



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Mark Eggers schrieb:
> On Tue, 02 Dec 2008 14:20:11 +0000, NM wrote:
> 
>> On Mon, 01 Dec 2008 22:31:33 +0000, NMONNET wrote:
>>
>>> Thanks a lot, it seems to be working. ☺
>> Well actually I now get this filling up my messages:
>>
>> Dec  2 15:16:34 ws pulseaudio[30881]: module-alsa-sink.c: ALSA woke us
>> up to write new data to the device, but there was actually nothing to
>> write! Most likely this is an ALSA driver bug. Please report this issue
>> to the PulseAudio developers.
> 
> 
> First of all, I had to add myself to the pulse-rt group in order to set 
> my Gnome sound to the pulse audio server.
> 
> I occasionally get these messages.  Like you, the frequency increased 
> dramatically when I added tsched=0 to my /etc/pulse/default.pa file.
> 
> Unfortunately for me, it did not reduce the CPU usage significantly when 
> running Audacious configured for pulse audio.
> 
> Adding tsched=0 did eliminate popping and crackling when running 
> Rhythmbox.
> 
> Kaffine is rather strange.  When configured to use the GStreamer engine, 
> the pulse audio volume monitor shows the client as 'unknown'.  When 
> configured to use the xine engine, the pulse audio volume monitor shows 
> the client as ALSA (expected).
> 
> Basically, any music player that appears to use pulse audio directly 
> causes pulse audio to use 13% - 16% CPU on a 2 GHz P6 ancient Dell system
> (playing a standard MP3 file).
> 
> Attempting to use pulse audio with Xine generates an immediate segfault 
> as shown in the /var/log/messages entry below.
> 
> xine[25985]: segfault at 0 ip 0072b4dc sp b51bbe30 error 4 in 
> libpulse.so.0.7.0[6cf000+6e000]
> 
> While I like the concept of pulse audio, there seems to be some 
> significant challenges (or at least a lack of understanding on my part).
> 
> I'll write up more about my adventures with pulse audio in another 
> message.
> 
> /mde/
> 


Just for the record: These problems are being tracked in redhat bugzilla

	[Bug 473080] libpulse segfaults on invalidated **environ
	https://bugzilla.redhat.com/show_bug.cgi?id=473080

	[Bug 471964] Choppy sound and freeze for rhythmbox
	https://bugzilla.redhat.com/show_bug.cgi?id=471964

Best regards,
Christian

- --
"He's an uncontrollable zombie cop from the Mississippi delta. She's a
 vivacious mute journalist from aristocratic European stock. They fight
 crime!"

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