I also have the problem with constant dimming. When I switched of all the dimming settings in gconf-editor under apps > gnome-power-manager > backlight (there are some settings that are only available here, and not from the settings applet) this no longer happens. It still happens after resume from suspend, but I can live with it.
I also have the problem with constant dimming. When I switched of all the dimming settings in gconf-editor under apps > gnome-power-manager > backlight (there are some settings that are only available here, and not from the settings applet) this no longer happens. It still happens after resume from suspend, but I can live with it.
I suspect it's related to this other bug, but I haven't been able to confirm it: /bugs.launchpad .net/ubuntu/ +source/ gnome-power- manager/ +bug/392122
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