I'm running TuxOnIce kernel version 2.6.34-r1 with gnome 2.28.2. I can hibernate using pm-hibernate as root but I do not have a hibernate button in the shutdown dialog box but it does have suspend button which works.
Here is some info based on https://wiki.ubuntu.com/DebuggingGNOMEPowerManager. After running: echo /sbin/tuxoniceui_text > /sys/power/tuxonice/user_interface/program echo /mnt/data/system/suspend_file > /sys/power/tuxonice/file/target I can using Hibernate: $ dbus-send --system --print-reply --dest="org.freedesktop.Hal" /org/freedesktop/Hal/devices/computer org.freedesktop.Hal.Device.SystemPowerManagement.Hibernate $ dbus-send --session --print-reply --dest="org.freedesktop.PowerManagement" --type=method_call --reply-timeout=6000 /org/freedesktop/PowerManagement org.freedesktop.PowerManagement.CanSuspend Error org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.PowerManagement was not provided by any .service files Does not work on Gentoo ? $ gconftool-2 -g /apps/gnome-power-manager/general/can_hibernate true $ gconftool-2 -g /apps/gnome-power-manager/general/can_suspend true $ polkit-auth | grep power-management.suspend org.freedesktop.hal.power-management.suspend $ polkit-auth | grep power-management.hibernate org.freedesktop.hal.power-management.hibernate $ pm-is-supported --suspend && echo $? 0 $ pm-is-supported --hibernate && echo $? 0 $ hal-device | grep power_management.can_ power_management.can_suspend = true (bool) power_management.can_suspend_hybrid = true (bool) power_management.can_hibernate = true (bool) I have being pulling my hair out over this missing hibernate button for over a day and Google is being useless in this matter.
