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[YS1 <1350220@xxxxxxxxxxxxxxxxxx>]

** Description changed:

+ EDIT : initial title was "hibernation fails because 99video does not
+ terminate"
+ 
  When I initiate an hibernation on my computer, the following frequently
  happens (about 50% of the time) :
  
  1. screen goes black (normal) ;
  2. instead of showing the progress of the writing of RAM to disk in console mode, the screen remains black ;
  3. the screensaver prompt for login appears ;
  4. after returning to desktop, I see that the network card is not functioning ;
  5. /var/log/pm-suspend.log last line is "Running hook /usr/lib/pm-utils/sleep.d/99video hibernate hibernate:".
  
  Indeed, a ps -ef | grep 99video shows that the /usr/lib/pm-
  utils/sleep.d/99video script is still running.
  
  If I kill this script, pm-utils logs "/usr/lib/pm-utils/sleep.d/99video
  hibernate hibernate: Returned exit code 143.", aborts hibernation and
  then runs the hooks for thaw.
  
  I can then try again to hibernate, and it works : I never had this bug
  trigger twice in a row.
  
  This bug did not occur when I was running Ubuntu 12.04 and the
  corresponding kernels (but back then I was also using the video card
  driver from AMD's website instead of fglrx-updates).
  
+ 
+ EDIT : further debugging (PM_DEBUG=true) shows that the blocking point in 99video is "chvt 63". I tried to hibernate with --quirk-no-chvt. This allows the script 99video to terminate and the hibernation process itself to engage. However, my hibernation module, /usr/lib/pm-utils/module.d/hibernate, does a chvt 63 too, which is not controlled by the --quirk-no-chvt.
+ 
+ So I experienced again a return to desktop with a chvt process not
+ progressing. I killed it and hibernation took place, without any visual
+ clue. On booting the system again, thaw took place correctly but the
+ system was not usable because I did not get access to a console
+ (graphical or text). Indeed, the pm-suspend.log shows that chvt 8 did
+ not return.
+ 
  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: pm-utils 1.4.1-13ubuntu0.1
  ProcVersionSignature: Ubuntu 3.13.0-32.57~ppa1-generic-tuxonice 3.13.11.4
  Uname: Linux 3.13.0-32-generic-tuxonice x86_64
  NonfreeKernelModules: fglrx
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Wed Jul 30 08:47:17 2014
  InstallationDate: Installed on 2014-07-18 (11 days ago)
  InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
  PackageArchitecture: all
  SourcePackage: pm-utils
  UpgradeStatus: No upgrade log present (probably fresh install)

** Summary changed:

- hibernation fails because chvt 63 hangs
+ hibernation fails because chvt hangs

** Attachment added: "log with debugging and --quirk-no-chvt"
   https://bugs.launchpad.net/ubuntu/+source/pm-utils/+bug/1350220/+attachment/4167863/+files/pm-suspend.log

-- 
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https://bugs.launchpad.net/bugs/1350220

Title:
  hibernation fails because chvt hangs

Status in “pm-utils” package in Ubuntu:
  New

Bug description:
  EDIT : initial title was "hibernation fails because 99video does not
  terminate"

  When I initiate an hibernation on my computer, the following
  frequently happens (about 50% of the time) :

  1. screen goes black (normal) ;
  2. instead of showing the progress of the writing of RAM to disk in console mode, the screen remains black ;
  3. the screensaver prompt for login appears ;
  4. after returning to desktop, I see that the network card is not functioning ;
  5. /var/log/pm-suspend.log last line is "Running hook /usr/lib/pm-utils/sleep.d/99video hibernate hibernate:".

  Indeed, a ps -ef | grep 99video shows that the /usr/lib/pm-
  utils/sleep.d/99video script is still running.

  If I kill this script, pm-utils logs "/usr/lib/pm-
  utils/sleep.d/99video hibernate hibernate: Returned exit code 143.",
  aborts hibernation and then runs the hooks for thaw.

  I can then try again to hibernate, and it works : I never had this bug
  trigger twice in a row.

  This bug did not occur when I was running Ubuntu 12.04 and the
  corresponding kernels (but back then I was also using the video card
  driver from AMD's website instead of fglrx-updates).

  
  EDIT : further debugging (PM_DEBUG=true) shows that the blocking point in 99video is "chvt 63". I tried to hibernate with --quirk-no-chvt. This allows the script 99video to terminate and the hibernation process itself to engage. However, my hibernation module, /usr/lib/pm-utils/module.d/hibernate, does a chvt 63 too, which is not controlled by the --quirk-no-chvt.

  So I experienced again a return to desktop with a chvt process not
  progressing. I killed it and hibernation took place, without any
  visual clue. On booting the system again, thaw took place correctly
  but the system was not usable because I did not get access to a
  console (graphical or text). Indeed, the pm-suspend.log shows that
  chvt 8 did not return.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: pm-utils 1.4.1-13ubuntu0.1
  ProcVersionSignature: Ubuntu 3.13.0-32.57~ppa1-generic-tuxonice 3.13.11.4
  Uname: Linux 3.13.0-32-generic-tuxonice x86_64
  NonfreeKernelModules: fglrx
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Wed Jul 30 08:47:17 2014
  InstallationDate: Installed on 2014-07-18 (11 days ago)
  InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
  PackageArchitecture: all
  SourcePackage: pm-utils
  UpgradeStatus: No upgrade log present (probably fresh install)

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