I have quite a few linux desktops that I manage, and recently after new monitors were added I am having a problem where if the monitor loses signal after power savings start, the machine is not usable again until its rebooted. These are Lenovo ThinkStation PCs with nvidia Quadro graphics cards and new LG monitors.
Is there a way to prevent the monitor from ever sleeping (including while the machine sits at the logon screen). I used to do this via an /etc/xdg/autostart file that would run "xset -dpms s off s noblank s 0 0 s noexpose" but that doesn't appear to work anymore.
I also tried setting the vaules in /usr/share/glib-2.0/schemas/org.mate.power-manger.gschema.xml and /usr/share/glib-2.0/schemas/org.mate.screensaver.gschema.xml to "0"
Any suggestions?