Preventing the GNOME (Xorg) screen from blanking to operate the Hewlett-Packard ZR30w via AMD FirePro W9000 Eyefinity

Because the Hewlett-Packard ZR30w displays do not always recover from sleep mode, it is best to keep them “always on.” When they fail to recover from sleep mode, they have “snow” and are unusable. Xorg must be killed and you have to rebuild the desktop.

sudo systemctl restart gdm


  1. gsettings set org.gnome.desktop.screensaver idle-activation-enabled false
  2. xset -dpms

Also suggested, for /etc/X11/xorg.conf

Section "ServerFlags"
    Option "BlankTime" "0"
    Option "StandbyTime" "0"
    Option "SuspendTime" "0"

xset -dpms s off s noblank s 0 0 s noexpose
xset -q

Via: backfill

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