after recent updates playing youtube videos in firefox causes sometimes freezing of the system

[Kamil]

After recent updates that fixed the bug https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1742675 on my computer the following different bug has appeared. Playing Youtube music videos (static picture + music, length 40-70 minutes) in Firefox (as background for other activities on computer) causes sometimes (rather often, up to several times per day) freezing of the system. And only restart through reset button can help.

Initially I though that it is related to different Javascript-related tasks (manipulating with complex widgets in Chromium, running heavy gulp tasks through yarn) but it looks they are not the reason (or at least not the main reason). Because right now I have seen the problem when keyboard/mouse was not touched at all.

That's why I think this information is rather enough; and I decided to post this bug.
---
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: kamil 2021 F.... pulseaudio
 /dev/snd/controlC1: kamil 2021 F.... pulseaudio
DistroRelease: Ubuntu 16.04
HibernationDevice: RESUME=UUID=5b5ffc28-8999-4ad7-9ff3-f3298c4f28c2
InstallationDate: Installed on 2017-06-23 (252 days ago)
InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release i386 (20170215.2)
MachineType: Packard Bell Easynote ENTE70BH
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-36-generic root=UUID=557e3c22-0c8c-44b3-a8f6-5446013327ad ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 4.13.0-36.40~16.04.1-generic 4.13.13
PulseList:
 Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
 No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-4.13.0-36-generic N/A
 linux-backports-modules-4.13.0-36-generic N/A
 linux-firmware 1.157.17
Tags: xenial
Uname: Linux 4.13.0-36-generic i686
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

_MarkForUpload: True
dmi.bios.date: 08/08/2016
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: V1.05
dmi.board.name: Easynote ENTE70BH
dmi.board.vendor: Packard Bell
dmi.board.version: V1.05
dmi.chassis.type: 10
dmi.chassis.vendor: Packard Bell
dmi.chassis.version: V1.05
dmi.modalias: dmi:bvnInsydeCorp.:bvrV1.05:bd08/08/2016:svnPackardBell:pnEasynoteENTE70BH:pvrV1.05:rvnPackardBell:rnEasynoteENTE70BH:rvrV1.05:cvnPackardBell:ct10:cvrV1.05:
dmi.product.family: BDW
dmi.product.name: Easynote ENTE70BH
dmi.product.version: V1.05
dmi.sys.vendor: Packard Bell

[Kamil (kamil2018)]

Without running Youtube and js-related tasks it is possible to use the system all day. But with Youtube and js tasks freezing occurs every 1-3 hrs.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1753010

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Kamil (kamil2018)]

apport information

[Kamil (kamil2018)]

apport information

[Kamil (kamil2018)]

apport information

[Kamil (kamil2018)]

apport information

[Kamil (kamil2018)]

apport information

[Kamil (kamil2018)]

apport information

[Kamil (kamil2018)]

apport information

[Kamil (kamil2018)]

apport information

[Kamil (kamil2018)]

apport information

[Kamil (kamil2018)]

apport information

[Kamil (kamil2018)]

apport information

[Kamil (kamil2018)]

apport information

[Kamil (kamil2018)]

apport information

[Kamil (kamil2018)]

apport information

[Kamil (kamil2018)]

apport information

[Kamil (kamil2018)]

Right now the system freezed on opening complex js widget in Chromium with opened debugger.
No Firefox and no Youtube were opened.

So, it looks freezing occurs mainly on any kind of operations requiring relatively heavy processor work.

Editing text files, browsing texts/images online, checking mail in Thunderbird may be done for hours without any problems.

[Kamil (kamil2018)]

Not sure whether this additional info can help but adding it: freezing does not occur immediately for the whole system; initially only one app freezes (any app); but within 1 minute the whole system freezes too.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.16 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.16-rc4

[Kamil (kamil2018)]

It will take from me several days to find some free time to understand how to test kernels safely on working machine. After that it will take up to several days to be sure that bug is resolved by such fix. So, you should expect from me report by the next Monday or so.

[Kamil (kamil2018)]

I still did not what you asked; but after recent standard update the situation has slightly improved. The system crashes once per day but not once per hour. (At least it was so during recent several days.)
As I remember, it is somewhat worse than it was much earlier (when it crashed once per several days) but much more better than recently.

More notes will be given in a week.

[Kamil (kamil2018)]

I still did not what you asked; but bug has appeared again.
It looks it is strictly related to memory consumption by Java because it appears hourly (or so) when large projects are opened in Phpstorm. But with a smaller project all is stable for day (or so).

[Kamil (kamil2018)]

Also it may be related to Symfony plugin; because the larger project is based on Symfony but a smaller one is based on Yii.

[Kamil (kamil2018)]

And without high load the system may be stable for days without shutdown.

[Kamil (kamil2018)]

You may close this bug. The problem does not relate to Ubuntu directly.
It was the issue of indexing in Phpstorm for symlinked folders and folders with cached temporary data.
Also it partially related to amount of memory dedicated to JVM.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]