I've bought a new acer aspire e14 laptop and installed ubuntu 15.04 but my problem is that I can't shutdown, suspend or reboot. it goes in the normal process the screen turn off but the led is always on, and the HDD never turn off.
I pressed esc while shutdown and the last message is
[83.973836] systemd_shutdown[1]: failed to finalize DM devices, ignoring
try # init 0 or poweroff for shutdown.
try # init 6 for reboot.