[Bug 34233] Re: g-p-m failing to use DPMS to power off display

[Richard Hughes]

>Meaning if lid=closed you will never get a running screensaver nor will it ever dpms.
>Only if lid=open it will dpms !!!

Incorrect. If the lid is closed then the automatic DPMS timeout is
disabled, and the lid DPMS is forced off. When the lid id re-opened,
then the DPMS is turned on, and the timeout restored. It sounds like you
may be suffering from an ACPI problem (or a bios or hardware problem)
where the lid status is not being detected correctly.

Richard.

-- 
g-p-m failing to use DPMS to power off display
https://launchpad.net/bugs/34233