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Maniphest T49208

[2.78 testbuild2] AL lib: (EE) ALCplaybackAlsa_mixerNoMMapProc: available update failed: Broken pipe
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Description

System Information
Ubuntu 14.04, 64-bit.
Graphics card is NVIDIA GTX 670, NVIDIA driver version is 370.23 (beta).

Blender Version
Broken: http://download.blender.org/release/Blender2.78/blender-2.78-testbuild2-linux-glibc219-x86_64.tar.bz2
Worked: 2.77a

Short description of error
Startup Blender from a console, this error message gets printed to the console.

I haven't tried to playback any audio within Blender after getting this error, let me know if I should do some testing in this regard.

Does not occur in 2.77a.

Related Objects

Event Timeline

sn0w75 created this task.Aug 31 2016, 12:22 AM
Sergey Sharybin (sergey) lowered the priority of this task from 90 to 30.Aug 31 2016, 11:28 AM
Sergey Sharybin (sergey) added a subscriber: Sergey Sharybin (sergey).

This is an error message printed by OpenAL library, so we can't really control this output. Things to check:

  • Check if the audio actually works. If it does work, then just ignore the message from the console ;)
  • Check if this happens with glibc211 builds.
sn0w75 added a comment.EditedSep 4 2016, 5:31 PM

OK, I did some testing with the new Release Candidate 1 builds.

  • The issue (error printed to console) still occurs in rc1-glibc219.
  • The issue does not occur in rc1-glibc211.

testbuild2 download links went down when rc1 went up, so I haven't tested testbuild2-gilbc211, but I would presume the issue does not occur in that build either.

Testing audio playback by loading an OGG file and playing it back in the Video Sequence Editor:

  • In rc1-glibc211, the OGG file played back normally.
  • In rc1-glibc219, while playing back the OGG file resulted in audible sound, on one attempt the playback was choppy, and on another attempt I got noise that didn't resemble the OGG at all.

I have a HDMI recorder I can use to record the audio playback in rc1-glibc211 vs. rc1-glibc219 if you'd like me to.

Sergey Sharybin (sergey) added a comment.Sep 4 2016, 5:51 PM

Does the issue happen with any sound? Any chance you can share ogg file which caused issue for you?

sn0w75 added a comment.Sep 4 2016, 6:40 PM

It seems to occur with any sound (I tested 3 different OGG files and 2 different MP3 files, all were either choppy or noisy when played back).

Here's one of the OGG files I tested.

Sergey Sharybin (sergey) raised the priority of this task from 30 to Normal.Sep 4 2016, 6:44 PM

Thanks, will have a closer look tomorrow.

Sergey Sharybin (sergey) triaged this task as 30 priority.Sep 5 2016, 3:20 PM

Unfortunately, didn't manage to reproduce the issue with any glibc219 builds on neither own system (Debian stable) nor on Ubunto 15.04 system we've got around and nor on the LiveCD of Ubuntu 14.04.

Things to try:

  • Start blender with factory settings (blender --factory-startup)
  • Try latest builds from builder.blender.org (i did re-compile OpenAL making sure all proper environment flags are set)
  • See if the sound exists if you boot Ubuntu 16.04 LiveCD on your machine.
  • See if you can reproduce the error on another machine.
sn0w75 added a comment.Sep 5 2016, 5:06 PM

The error message and choppy/glitched sound persists when starting blender 2.78-rc1 with factory settings (--factory-startup).

On the latest glibc219 build from builder.blender.org, the error message and choppy/glitched sound still occurs, although there was one instance where it randomly played back a sound normally despite the error message still being printed to console.

Fortunately this issue isn't critical since it seems to only occur on glibc19 builds.
I'll try to get around to some 16.04 LiveCD tests on my machine as well as another machine soon.

Sergey Sharybin (sergey) added a comment.Sep 5 2016, 5:21 PM

The thing is hat glibc211 environment is really tricky for maintenance now, and really difficult to add new dependencies we need (for example, HMD support thingies). So eventually we'll be retiring glibc211 sooner than later. So from this point of view we have to figure out what causes the problem.

I did another trick: just used OpenAL libraries from glibc211 environment now. Mind downloading fresh buildbot version again and give it a try? :)

sn0w75 added a comment.EditedSep 5 2016, 6:14 PM

Ahhh, I see, I wasn't aware of those circumstances.

Glad to help :) I tried out 922aefb-glibc219, issue does not occur in this latest build (no error msg in console, sound seems to play normally)

Sergey Sharybin (sergey) added a comment.Sep 5 2016, 10:01 PM

That is interesting. Would be really curios to know why. Could be some compiler bug, or issue in OpenAL code which is visible when new compilers are used..

Would you mind doing some more tests in the coming days so we'll figure out the root of the issue? (just afraid at some point we'll have to update OpenAL and if we can't compile proper lib in a new environment it'll be a real bummer :S).

sn0w75 added a comment.Sep 6 2016, 1:18 PM

Yeah, I don't mind. Just make a comment on the ticket and I'll get on it as soon as I can.

Bastien Montagne (mont29) raised the priority of this task from 30 to Normal.Sep 16 2016, 5:22 PM
Aaron Carlisle (Blendify) changed the task status from Unknown Status to Unknown Status.Aug 20 2017, 7:11 AM
Aaron Carlisle (Blendify) claimed this task.
Aaron Carlisle (Blendify) added a subscriber: Aaron Carlisle (Blendify).

Closing due to no reply.