Public bug reported:

For a couple of years I have usually not shut down my pc after using it, I just 
leave it and let it suspend.
(Of course I have also shut down the system completely every now and then.)
This has worked well but recently with new kernels 4.2.0-* I get problems.

Further investigations show that it is automount that fails when :
1. a file is opened for writing on a nfs-mounted volume that autofs mounts
2. autofs unmounts the nfs directory after five minutes of inactivity, AND
3. the system is automatically suspended after ten minutes of inactivity

After resuming activity it is impossible to access the volume on the
server

To reproduce:
    cat > /path/to/file/on/automounted/nfs-dir/file.txt
    write some text
    wait for the system to suspend

    Activate the system again and try to access the automounted volume

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: linux-image-4.2.0-27-generic 4.2.0-27.32
ProcVersionSignature: Ubuntu 4.2.0-27.32-generic 4.2.8-ckt1
Uname: Linux 4.2.0-27-generic i686
ApportVersion: 2.19.1-0ubuntu5
Architecture: i386
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  seved      2472 F.... pulseaudio
CurrentDesktop: Unity
Date: Thu Feb 11 09:35:17 2016
HibernationDevice: RESUME=UUID=38682e03-657e-46a8-b728-71bb6b19ffd3
InstallationDate: Installed on 2010-11-12 (1916 days ago)
InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release i386 (20100816.1)
MachineType: Gigabyte Technology Co., Ltd. G41M-ES2L
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-27-generic 
root=UUID=67935e67-5ba7-4442-8401-b0134d6ca21f ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.2.0-27-generic N/A
 linux-backports-modules-4.2.0-27-generic  N/A
 linux-firmware                            1.149.3
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/04/2009
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F6
dmi.board.name: G41M-ES2L
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: 
dmi:bvnAwardSoftwareInternational,Inc.:bvrF6:bd11/04/2009:svnGigabyteTechnologyCo.,Ltd.:pnG41M-ES2L:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnG41M-ES2L:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: G41M-ES2L
dmi.sys.vendor: Gigabyte Technology Co., Ltd.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 wily

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https://bugs.launchpad.net/bugs/1544462

Title:
  automount fails on resume after suspend if file open for writing

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