Hello

With the kernel from linux-generic-hwe-16.04-edge, I was able to obtain
in one crash the part of a log file which I was unable before, but
corrupted the content after this. This new part refers to a file called
swapops.h.

I have attached the syslog file with the new information. As in the
other times, this is the valid data, as the rest of the syslog ended
corrupted (it appears ################# on LibreOffice and
\00\00\00\00\00\00\00\00\ on gedit). At 16:17, cron run and the system
is fine. At 16:39, the system locked and I waited some time, until I
turned the computer off.

I am not a developer, but from what I understood, the swap operation is
the cause of this, and the ALSA error is a consequence of the swap
error. This is happening with Starbound when teleporting so frequently
because while it loads the map, it could start to use swap memory, and
then this crash happens.

Also, this explains why the computer recovers itself rarely. The
operations which triggered it had ended, so the system was able to
recover. With the game opened, the operations are always happening, so
it would never recover.

I hope this interpretation is correct.

Thank you.

** Attachment added: "kcrash"
   
https://bugs.launchpad.net/ubuntu/+source/alsa-lib/+bug/1687353/+attachment/4873696/+files/kcrash

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https://bugs.launchpad.net/bugs/1687353

Title:
  System freezes due to ALSA error and recovers after significant time

Status in alsa-lib package in Ubuntu:
  Confirmed

Bug description:
  Hello

  I have a Lenovo Ideapad 310. I was having issues with power
  management, and was using upstream kernels. I noticed they had
  frequent freezes, so I decided to use the standard from Ubuntu 16.04
  (today, 4.4.0-75). But now it has this freezes too, so something which
  was bugged on the newer kernel was inserted on 4.4.0-75, as previous
  version (4.4.0-72) hadn't this issue.

  What is happening is: the system freezes. The sound that was being
  played loops endlessly. Everything freezes, Ctrl+Alt+Fnumber don't
  work. The system completely stops. Normally, I would just power the
  computer off keeping the power button pressed. But this time I tried
  to recover it, as the syslog ended always corrupted. I needed to gets
  the logs at least once. So I started to disconnect hardware parts:
  battery charger, external USB HDD (it was not being accessed), USB
  mouse, USB keyboard. When I disconnected the sound jack, I noticed the
  mouse moved, so it was recoverable.

  I waited for 100 seconds until the system recovered. When it
  recovered, looked like nothing had happened, and now I'm writing this
  report from the computer, without restarting.

  Steps to reproduce:
  1) open Audacious or VLC;
  2) play a music/video on Audacious or VLC;
  3) open another program with sound (Steam, a browser (I use Opera), etc);
  4) use the computer until a freeze happens.

  Observations:

  -Audacious + Steam + Starbound is nearly 100% chance of triggering it (SDL?).
  -VLC + Opera + Firefox (on start page) was enough for trigger it once, even 
with the only program with media opened being VLC.

  The freeze I was able to recover had: Opera Developer (YouTube video
  playing) + Audacious (playing) + Steam with audio streams opened on
  pavucontrol. Additionally, Thunderbird and Evince were opened, and
  intel-gpu-overlay was opened inside a Xnest window.

  The syslog says to report to alsa, so I'm writing the report here.
  However, it should be noted that there is a i915 error too, maybe it
  was a consequence, maybe it was the cause.

  $ lsb_release -rd
  Description:  Ubuntu 16.04.2 LTS
  Release:      16.04

  $ uname -a
  Linux usuario-Lenovo-ideapad-310-14ISK 4.4.0-75-generic #96-Ubuntu SMP Thu 
Apr 20 09:56:33 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

  Thank you.

  Edit: one thing I noticed with indicator-multiload, the internal HDD
  activity completely stopped while this problem was happening and soon
  after it started to function. It was like the computer was recovering
  with the internal HDD turned off. The HDD usage ramped up and the
  system returned to normal. May this be related with the power
  management issues?

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: libasound2 1.1.0-0ubuntu1
  ProcVersionSignature: Ubuntu 4.4.0-75.96-generic 4.4.59
  Uname: Linux 4.4.0-75-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.5
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Sun Apr 30 23:43:29 2017
  Dependencies:
   gcc-6-base 6.0.1-0ubuntu1
   libasound2-data 1.1.0-0ubuntu1
   libc6 2.23-0ubuntu7
   libgcc1 1:6.0.1-0ubuntu1
  InstallationDate: Installed on 2016-12-31 (121 days ago)
  InstallationMedia: Xubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 
(20160719)
  SourcePackage: alsa-lib
  UpgradeStatus: No upgrade log present (probably fresh install)

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