I'm running both Unity and Cinnamon in 14.04 with lightdm. That way unity-greeter takes over on logout from both.
To get display power off to work on my desktop I added (username) and root to lightwm in the /etc/group file.
lightdm:x:111:(username),root
Then I added the executable script /usr/bin/dpms-start :
#!/bin/sh
#
/usr/bin/xset +dpms
exit
In the /usr/share/lightdm/lightdm.conf.d/ directory I added the 50-dpms.conf file :
I'm running both Unity and Cinnamon in 14.04 with lightdm. That way unity-greeter takes over on logout from both.
To get display power off to work on my desktop I added (username) and root to lightwm in the /etc/group file.
lightdm: x:111:( username) ,root
Then I added the executable script /usr/bin/dpms-start :
#!/bin/sh
#
/usr/bin/xset +dpms
exit
In the /usr/share/ lightdm/ lightdm. conf.d/ directory I added the 50-dpms.conf file :
[SeatDefaults] setup-script= /usr/bin/ dpms-start
display-
A bash script may also work by changing the user to lightdm before executing "/usr/bin/ dpms-start" :
sudo xhost +SI:localuser: lightdm
sudo su lightdm -s /bin/bash <<HERE
/usr/bin/dpms-start
exit
HERE
You then don't have to modify the /etc/group file. Hope this works for others still having trouble.