[Bug 1351564] [NEW] chvt sometimes hangs, causing hibernation to fail

[YS1]

Public bug reported:

This is probably in relation with bug #1350220, which deals with a
failure in hibernation. It appears that this is caused by chvt not
terminating a some points in the hibernation scripts. Yet I do not know
whether the scripts or chvt are to blame.

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.

Further debugging (PM_DEBUG=true) shows that the blocking point lies in
99video and is "chvt 63". I tried to hibernate with --quirk-no-chvt.
This allows the script 99video to terminate (because it does not try a
chvt 63) 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: kbd 1.15.5-1ubuntu1
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: Sat Aug  2 09:52:13 2014
InstallationDate: Installed on 2014-07-18 (14 days ago)
InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
SourcePackage: kbd
UpgradeStatus: No upgrade log present (probably fresh install)

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


** Tags: amd64 apport-bug trusty

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to kbd in Ubuntu.
https://bugs.launchpad.net/bugs/1351564

Title:
  chvt sometimes hangs, causing hibernation to fail

Status in “kbd” package in Ubuntu:
  New

Bug description:
  This is probably in relation with bug #1350220, which deals with a
  failure in hibernation. It appears that this is caused by chvt not
  terminating a some points in the hibernation scripts. Yet I do not
  know whether the scripts or chvt are to blame.

  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.

  Further debugging (PM_DEBUG=true) shows that the blocking point lies
  in 99video and is "chvt 63". I tried to hibernate with --quirk-no-
  chvt. This allows the script 99video to terminate (because it does not
  try a chvt 63) 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: kbd 1.15.5-1ubuntu1
  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: Sat Aug  2 09:52:13 2014
  InstallationDate: Installed on 2014-07-18 (14 days ago)
  InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
  SourcePackage: kbd
  UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/kbd/+bug/1351564/+subscriptions