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[Seved Torstendahl <sevedt@xxxxxxxxx>]

Actually I have misinterpreted the swedish terms, my system has been suspended when I see the symptoms. 
I have checked hibernation also, it seems to be the same problem. But hibernation is not an option after inactivity. 

I also wrote firefox when it really was thunderbird that I meant.

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 unmount 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 (setting in the power management, I chose ten minutes)

Activate the system again and try to access the automounted volume

-- 
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https://bugs.launchpad.net/bugs/1543152

Title:
  nfs hangs after wakeup from hibernation, kernel 4.2.0-*

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  For a couple of years I have usually not shut down my pc after using it, I just leave it and let it hibernate.
  (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 that I suppose comes from nfs.
  I have my firefox account and a folder in my PATH on a server with the file system automounted using nfs.
   - each new terminal window hangs without a prompt
   - a busybox terminal with a simpler PATH works ok
   - when I click on anything in the firefox window it hangs and is greyed-out. The system says "not responding" if I try to kill it

  I have output from 'ps ax', ps -eF' and 'mount' commands that I will attach.
  What more info do you need?

  Regards,
  Seved

  ---
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  seved      2509 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 15.10
  HibernationDevice: RESUME=UUID=38682e03-657e-46a8-b728-71bb6b19ffd3
  InstallationDate: Installed on 2010-11-12 (1914 days ago)
  InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release i386 (20100816.1)
  MachineType: Gigabyte Technology Co., Ltd. G41M-ES2L
  Package: linux (not installed)
  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
  ProcVersionSignature: Ubuntu 4.2.0-27.32-generic 4.2.8-ckt1
  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
  Tags:  wily
  Uname: Linux 4.2.0-27-generic i686
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm admin audio cdrom dialout lpadmin plugdev sambashare
  _MarkForUpload: True
  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.

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