Is your monitor an LED type? It could have dynamic brightness. My tv does the same thing - also annoying. -Allan On 04/09/2012 07:09 PM, Jeff Cen wrote: > Hi Nate, > > Thank you for the reply. My machine is a box sitting away from me and doesn't have a ambient light sensor. > > > Can the problem be gnome or the LCD monitor related? > > > > Jeff > > > > ________________________________ > From: Nate Duehr<denverpilot at me.com> > To: CentOS mailing list<centos at centos.org> > Sent: Monday, April 9, 2012 3:07 PM > Subject: Re: [CentOS] screen brightness changes depending on which application is run > > On Apr 8, 2012, at 12:18 PM, Jeff Cen wrote: > >> Hi, >> >> I found my LCD screen brightness increase when I use firefox and other white background editors and screen brightness decrease when I use dark background applications, such as terminals with black background . The change in screen brightness depending on the applications has been annoying. >> >> >> My centos version is ver 5.7 64 bit. Has anyone seen a similar problem or have a solution for that? Thanks in advance. >> >> Jeff > > Jeff, > > Does your machine have an ambient light sensor? > > Light from the monitor, reflecting off of you, will often trigger changes in the amount of light the ambient light sensor is seeing. > > Happens most with large changes like switching from a bright white (browser) background to a dark one, just as you describe in your symptoms. > > Nate > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > >