Doug H. writes:
On Tue, 2015-12-29 at 08:19 -0500, Sam Varshavchik wrote:
At some point recently, my monitor stopped getting turned off after the prescribed period of inactivity. I'm using the XFCE power manager, and its settings remain untouched.
Manually executing "xset dpms force off" turns the monitor off normally. "xset q" shows that everything appears to be in order:
DPMS (Energy Star): Standby: 300 Suspend: 360 Off: 420 DPMS is Enabled Monitor is On
So, what else can I check?
I doubt this is your issue, but just in case...
Does it only fail to do the "Off" part or is it not doing any of the three?
It wasn't doing anything at all.
The funny thing though, after I did this poking around, such as running "xset dpms…" etc, an hour later I came back and the monitor was powered down. Since then, all DPMS functionality was, once again, operating normally.
Originally even a reboot made no difference – that is DPMS still wasn't working after a reboot. But, manual poking with xset seems to have kicked something back into gear.