Moving files after playback with vlc finished is extremely slow

[Karl-Philipp Richter]

When a file was opened in `vlc` and played back and the playback finished, moving that file in a file manager (reproduced in `dolphin` and `nautilus`) takes up to several seconds (during which the file manager freezes) while the move occurs instantly when it is opened with `kaffeine` (after the playback finished - and as well when it is played back). The doesn't occur irregularily when the file is moved during playback. The issue occurs on btrfs filesytems only.

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: vlc 2.2.0~pre2-4build1
Uname: Linux 3.18.4-031804-generic x86_64
ApportVersion: 2.14.7-0ubuntu8.1
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Jan 27 23:19:35 2015
EcryptfsInUse: Yes
InstallationDate: Installed on 2015-01-26 (0 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
SourcePackage: vlc
UpgradeStatus: No upgrade log present (probably fresh install)

[Karl-Philipp Richter (krichter722)]

> affects: vlc (Ubuntu) → linux-ports-meta (Ubuntu)
The issue really only occurs with `vlc` and there're no issues regarding file moving or freezes of the file manager(s).

[Joseph Salisbury (jsalisbury)]

Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.19 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'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-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/v3.19-rc6-vivid/

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Mike (michael-vm)]

This bug may be related to the following issue: https://forum.videolan.org/viewtopic.php?f=13&t=122757

[Karl-Philipp Richter (krichter722)]

> This bug may be related to the following issue: https://forum.videolan.org/viewtopic.php?f=13&t=122757
I can confirm the filmed behavior for the start and it is applicable to opening a video when another is playing as well. The issue occurs randomly in my case, though.

[Mike (michael-vm)]

I'm thinking this is related to the desktop session manager (I posted a GDB backtrace in the VLC thread above).

Maybe this bug is related: https://bugs.launchpad.net/ubuntu/+source/gnome-session/+bug/58171

[Karl-Philipp Richter (krichter722)]

On Linux 3.19.1 in Ubuntu 14.10 amd64 files which have been played with `vlc` 2.2.0-pre2 cause `gdm` to hang for > 30 minutes (after that time I killed `nautilus` in another tty with `pkill nautilus`) if these failes are dragged (dropping isn't possible due to hang and necessity to kill `nautilus`).