Liaison for Desktops, Alienware, MonitorsSocial Media Support#IWork4DellWould you like to be a Dell Community Rockstar?
The actual culprit is TMM, Vista's process that looks for multiple monitors and attempts to intelligently modify resolution. If you aren't using multiple monitors, you can disable TMM:
1. right-click on 'computer' and select 'manage'2. on the left pane, expand 'task scheduler' then ' task scheduler library' then 'Microsoft' then 'Windows' then 'MobilePC'3. select TMM in the center pane, then on the right pane, choose 'disable'
I disabled the TMM on my Dell Inspiron 1420, running Vista Home, because it was doing the same thing... upon logging on, either from cold start-up or from sleeping/hibernating, the screen resolution would reduce greatly. Disabling the TMM did not help me. The screen resolution reduces still. Any other ideas?