atd fails to execute jobs in a timely manner after sleep/hibernation

[Matthias Kretz]

Binary package hint: at

How to reproduce:
put a job into atd. E.g.
% echo "date > /tmp/atd.stamp"|at 11:00
Then put the computer to sleep. After wakeup, the job will not execute at 11:00 anymore - or if that time has already passed, it should execute right away, but often takes 0.5h or more.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: at 3.1.12-1ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Tue May 17 09:02:51 2011
InstallationMedia: Kubuntu 11.04 "Natty Narwhal" - Release amd64 (20110426.3)
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/zsh
SourcePackage: at
UpgradeStatus: No upgrade log present (probably fresh install)

[Matthias Kretz (mkretz)]

Attached is a solution to the problem. It might be better to fix it in atd itself (i.e. use something different than sleep, or install a signal handler).

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Kanehekili (jentiger-moratai)]

I would like to confirm the bug. It happens on Xubuntu 12.10. The workaround from Matthias Kretz solved it. (I had to replace SIGHUP with 1 - then it worked. It took me weeks to locate that problem - it should be fixed!