The root of this problem seems to vary, from research I've done so far. In my case, on Ubuntu 16.04 with 367.57 drivers, xset q
reports that "DPMS is Disabled". If I manually run xset dpms
, DPMS becomes enabled.
I haven't yet found a good way to automate this, though. I found a report that adding Option "DPMS"
to the Device section of xorg.conf might help, but it didn't help me.
I added that command to my .bashrc, because I start xterms a lot:
case "$TERM" in
xterm*|rxvt*)
xset dpms
;;
*)
;;
esac
But there has to be a better way.