power button shuts down immediatly (no warning)

[Jean-Baptiste Lallement]

Binary package hint: lightdm

TEST CASE:
1. Boot the system
2. On the login screen press the power button (short press)

Result:
The system shuts down.

Expected:
A dialog with the option hibernate/suspend, restart, poweroff

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: lightdm 0.3.7-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.39-3.10-generic 2.6.39
Uname: Linux 2.6.39-3-generic i686
Architecture: i386
Date: Fri Jun 3 10:06:19 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110209)
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 LC_MESSAGES=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: lightdm
UpgradeStatus: No upgrade log present (probably fresh install)

[Jean-Baptiste Lallement (jibel)]

Not sure if it a lightdm defect. The behavior is the same once logged in. When the power button is pressed during an active session, the screensaver is shown for a brief moment then the system shuts down.

[Brendan Donegan (brendan-donegan)]

Actually the system goes to suspend when you press the power button.

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[D. Hugh Redelmeier (hugh-mimosa)]

See also <https://bugs.launchpad.net/ubuntu/+source/unity-greeter/+bug/903306> "no reaction on shortly pressing power button"

This bug is likely in the same logic.

[hamish (hamish-b)]

It would be nice if it acted like the old gdm of Lucid (?) and required admin password to power off or reboot if other users were logged in, combined in a nice pop up explaining that hang on, someone else is logged in here.

you can make a file like /etc/polkit-1/localauthority/50-local.d/disable-shutdown.pkla
"""
[Disable Shutdown, etc.]
Identity=unix-user:*
Action=org.freedesktop.login1.reboot-multiple-sessions;org.freedesktop.login1.power-off-multiple-sessions;org.freedesktop.login1.suspend-multiple-sessions;org.freedesktop.login1.hibernate-multiple-sessions
ResultAny=no
ResultInactive=no
ResultActive=no
"""

to grey out the buttons in that case, but I've found our students tend to not understand why things are greyed out and pull the power instead of asking. And then once again after reboot when iowait sucks (because the RAID was trying to rebuild for the nth time... sigh)

thanks,
Hamish