A fix for that is available here: http://cgit.freedesktop.org/xorg/xserver/patch/?id=db568f9eabf3450d8a023597ff007df355b13ea8
See Richard Hughes blog: http://blogs.gnome.org/hughsie/2009/08/14/blanking-in-gnome-power-manager-fixed/
A fix for that is available here: http:// cgit.freedeskto p.org/xorg/ xserver/ patch/? id=db568f9eabf3 450d8a023597ff0 07df355b13ea8
See Richard Hughes blog: http:// blogs.gnome. org/hughsie/ 2009/08/ 14/blanking- in-gnome- power-manager- fixed/