Comment 5 for bug 277309

The gnome-icon-theme doesn't have suspend/hibernate icon may be based on the fact that the original gnome session dialog doesn't use icons for suspend/hibernate buttons, which may also be an explanation to the tango icon theme. In Ubuntu Intrepid, the gnome-session package got patched to display icon for each action, therefore the missing of these icon may have led to this issue. I removed the link to the gnome bug report (which I've also marked as obsolete) cause it seems not a upstream bug.

Due to the irregular naming scheme used in the patch (drive-harddisk for hibernate, sleep for suspend), how to fix this bug would depend on if and how Bug #274889 is going to be fixed.