D420 External Display max. Refresh Rate w/Dock

I'm getting the feeling that this may be a limitation of the dock itself. Have you tried finding drivers for the monitor? It may be possible that it isn't being correctly recognized. (It could also be that the dock is limited, due to signaling issues; in which case you're out of luck on this one.)

I have tested with the D/Port and without and the result has been the same. I think that the problem lies in the Intel 945GM Graphics Controller driver. I have seen similar problem with a colleague with D620 and read posts with D820. Even the latest video driver won't help. I'm severely disappointed and my eyes are hurting after working the whole day with 60 Hz flickering screen ;-(.

I, too, am seeing this problem with the 945GM video on a Dimension 820.

Sometimes, if I have hooked my monitor directly to the laptop video minus a dock or a KVM switch, I can get it to switch to 1600x1200@75 on the external monitor, but it's extremely flaky. After a couple of suspends, or after disconnecting from the monitor, it's back to only allowing 1024x768@60.

The worst thing is, when you use the Display Properties to switch, it tells you it switched to 1600x1200, but the monitor clearly shows it's only running at 1024x768. Any attempt to change the resolution again after that gets errors from the display driver.

Does anyone know of any setting to disable the check for monitor capabilities, and tell the card to just shut up and display at whatever resolution and frequency we want it to?