Bug 476848

Summary:	POLLERR/POLLOUT/PCM state messages on laptop suspend/resume.
Product:	[Fedora] Fedora	Reporter:	Tom London <selinux>
Component:	pulseaudio	Assignee:	Lennart Poettering <lpoetter>
Status:	CLOSED NOTABUG	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	low
Version:	rawhide	CC:	lkundrak, lpoetter, pierre-bugzilla
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2008-12-17 21:59:16 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Tom London 2008-12-17 14:42:24 UTC

Description of problem:
I suspended my rawhide system while rhythmbox/pulseaudio was playing.

Audio during suspend was "choppy", that is, it sounded like the "last buffer" was repeated a number of times before the system "went to sleep". I suspect that cannot be helped...

When I resumed, all came back perfectly, including rhythmbox/pulseaudio continuing to play right where it left off. This is very impressive.

Examining /var/log/messages, I notice the following. Not sure this is a bug/issue, or just INFO type logging, so feel free to close as appropriate.

Dec 17 06:28:44 tlondon kernel: PM: resume devices took 3.154 seconds
Dec 17 06:28:44 tlondon pulseaudio[3085]: alsa-util.c: snd_pcm_avail_update() returned a value that is exceptionally large: 534428 bytes (3029 ms) Most likely this is an ALSA driver bug. Please report this issue to the PulseAudio developers.
Dec 17 06:28:44 tlondon pulseaudio[3085]: module-alsa-sink.c: Increasing wakeup watermark to 40.00 ms
Dec 17 06:28:44 tlondon pulseaudio[3085]: alsa-util.c: Got POLLERR from ALSA
Dec 17 06:28:44 tlondon pulseaudio[3085]: alsa-util.c: Got POLLOUT from ALSA
Dec 17 06:28:44 tlondon pulseaudio[3085]: alsa-util.c: PCM state is SUSPENDED
Dec 17 06:28:44 tlondon kernel: Restarting tasks ... done.
Dec 17 06:28:44 tlondon pulseaudio[3085]: alsa-util.c: Got POLLERR from ALSA
Dec 17 06:28:44 tlondon pulseaudio[3085]: alsa-util.c: Got POLLOUT from ALSA
Dec 17 06:28:44 tlondon pulseaudio[3085]: alsa-util.c: PCM state is RUNNING
Dec 17 06:28:44 tlondon pulseaudio[3085]: alsa-util.c: Got POLLERR from ALSA

The last 3 messages are repeated many times.

As stated above, sound appears 100% functional.

Version-Release number of selected component (if applicable):
pulseaudio-0.9.13-7.fc11.x86_64

How reproducible:
Believe so.....

Steps to Reproduce:
1. Suspend while rhythmbox is playing
2. Resume
3. Check log

Actual results:

Expected results:

Additional info:

Comment 1 Lennart Poettering 2008-12-17 21:59:16 UTC

These messages are mostly informational to help debugging the cases were resuming does not work properly.

Upstream I have now downgraded the three messages so that they are only shown in verbose/debug mode.