I'm using quantal 12.10 and gvfs 1.14

I have the same problem you can't kill VLC when it gets stuck which happens 
about 50% of the you try to start video.
Same happens with GNOME mplayer if you open two of them to play same file. 
Only way to kill all stuck processes is to kill gvfsd-smb.
Tried upgrading fuse to 2.9.2 since it has some kind deadlock fixes. I though 
gvfsd-smb used fuse but building fuse and upgrading it to 2.9.2 didn't help.

gvfsd-fuse seems to be stuck as well. Because if i try to kill gvfsd-
fuse it doesn't get killed until gvfsd-smb is killed.

Stack traces.

gvfs-fuse

[<ffffffff810aacfd>] futex_wait_queue_me+0xcd/0x100
[<ffffffff810ab49c>] futex_wait+0x19c/0x2d0
[<ffffffff810ad46c>] do_futex+0x11c/0xa40
[<ffffffff810ade1d>] sys_futex+0x8d/0x190
[<ffffffff81689d29>] system_call_fastpath+0x16/0x1b
[<ffffffffffffffff>] 0xffffffffffffffff

gvfs-smb

[<ffffffff81194549>] poll_schedule_timeout+0x49/0x70
[<ffffffff81195b9a>] do_sys_poll+0x3ba/0x4d0
[<ffffffff81195d8b>] sys_poll+0x6b/0x100
[<ffffffff81689d29>] system_call_fastpath+0x16/0x1b
[<ffffffffffffffff>] 0xffffffffffffffff

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to gvfs in Ubuntu.
https://bugs.launchpad.net/bugs/1077696

Title:
  mounted samba share stops working for file access

Status in “gvfs” package in Ubuntu:
  Confirmed

Bug description:
  Ubuntu 12.10 - same problem when acessing SMB shares from two computers
  same for shares both on Ubuntu 12.10 server, and a windows server.

  Reproduce; 
  it helps if you play a video/movie using vlc or mplayer from share.   the 
file should be open for hours. (use pause)
  - when unpaused, the file will play fine.
  -no new big files on that share will open, small files may work.
  unmounting + remounting  the SMB share may fixe the problem, but other 
processes may be affected:
  VLC - while stuck with such samba problem,  is impossible to kill, same for 
smplayer
  sudo killall vlc -s KILL
  .. will not kill it.
  and so unmounting the share takes >10 attempts..

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: gvfs-backends 1.14.0-0ubuntu6
  ProcVersionSignature: Ubuntu 3.5.0-18.29-generic 3.5.7
  Uname: Linux 3.5.0-18-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.6.1-0ubuntu6
  Architecture: amd64
  Date: Sun Nov 11 20:30:49 2012
  ExecutablePath: /usr/lib/gvfs/gvfsd-smb
  MarkForUpload: True
  ProcEnviron:
   SHELL=/bin/bash
   XDG_RUNTIME_DIR=<set>
   PATH=(custom, no user)
   LANG=en_US.UTF-8
  SourcePackage: gvfs
  UpgradeStatus: Upgraded to quantal on 2012-10-17 (25 days ago)

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