My wife recently purchased a U2412M monitor. Two inputs are being used. One is connected to a late 2009 iMac, and the other is connected to a Surface Pro 2 dock. Either the iMac is turned on, or the Surface Pro 2 is. They are never both turned on at the same time. There are two issues:
Firstly, if the iMac is in sleep mode, the Dell logo regularly flashes up on the U2412M. The monitor is thus often awake whilst the iMac is in sleep mode. I assume that this is to do with the "Auto-Select" input function. I have tried setting it manually to the relevant input. This seems to solve the problem, but if the monitor is switched off, the input setting reverts to "Auto-Select". Can this be better managed?
Secondly, where the monitor is in sleep mode, it can sometimes take quite a while to wake. Is that normal for this model?
I use Dell monitors for work, and have not experienced either of these problems. Are there different settings which would assist?