Comment 29 for bug 1303736

I notice a very similar issue on a fresh install of Xubuntu 14.04 on a Dell Inspiron:
I'm noticing issues with putting the laptop to Suspend. Whether I do it from xfce4-session-logout or from xfce4-power-manager, the laptop will hang on attempting to Suspend, when I hit the power button the laptop shuts down, when I restart
there is the "Report a problem" wizard which reports that the laptop failed to resume properly from suspend.

HOWEVER, the awkward issue is that when I do Suspend from within LightDM it works fine (doesn't hang _and_ resumes fine). Also, `sudo pm-suspend` works, too, without a glitch.