Posted October 23, 200915 yr Had the same problem here. I looked under Device Manager and noticed that I had two installations of the same generic PnP driver. I uninstalled one and everything seems to work fine now. I think it must have been saving settings to one and getting them from the other, or something. "sgk00" wrote: > I use an external monitor with my laptop for a dual monitor extended desktop. > I want the external monitor to be the primary. This is easily setup via my > video driver software, windows display settings, or third party SW like > UltrMon. The problem is at logon Windows Vista resets the display settings > to make the Laptop screen the primary display, and changes the "layout" of > the monitor locations, and sometimes the refresh rate of the external > monitor. This happens at any logon whether from system restart or a simple > logon from locking the system. > > I experimented with UltraMon to see if simply forcing the display settings I > want via the StartUp menu would work. It appears the change Vista causes > happens after the services and StartUp programs load. This seems consistent > with the fact that a simple unlock logon causes the same problem. > > Note: the reset occurs at the end of the logon sequence. The logon screen > itself is always positioned correctly, and the desktop is redrawn properly on > both monitors until the end of the sequence when the display is changed. > > System Info: Dell XPS M1212 Laptop, NVidia Ge Force Go 7400 Adapter, Dell > 2007WFP external Monitor, Windows Vista Home Premium Upgrade, all latest > drivers from Dell and MS, clean system (only OEM as delivered software with a > by the book upgrade to Vista), software passed vista compatibility checks.
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