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Had an 19" for my secondary monitor, now have a 23". Detect doesn't see it and the resolution I need is not available. Sheer laziness here (and have an ISO downloading at the moment), but is it possible to force a re-detect without rebooting?


Please, I'm not looking for a "how do I setup a secondary display?" kind of answer here.

Thought I was pretty clear, but the issue is that if you swap in a different secondary monitor (and this likely would be the same if you had only one monitor; I suspect it's a limitation of the video card as commented below), it's not obvious whether you can "trick" or coax Windows into detecting the newly-swapped in monitor; I know when you reboot, Windows detects the new display, just wanted to know if this was possible without rebooting.

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Is there a utility available with your video card? Sometimes those are handy for customizing the display options from the tray. – Austin Sanderson Aug 29 '15 at 0:01
Maybe I'm not understanding the problem... I connect and disconnect from a half-dozen different monitors using VGA and HDMI, at least 20 each week, and run a single display half the time on my current and previous Windows 7 laptop and never reboot or shutdown/startup during the week, in and out sleep all the time... Windows just handles this seamlessly. I don't think there is anything your supposed to do as long as the monitor is PnP compliant, which anything in the last 10 years. What am I missing? – acejavelin Apr 20 at 0:16

Yes. Right-click on the desktop, select Display, select second screen (should be grayed out) and select "Use this display." You can then set it to Mirror, Extend, Primary, etc based on your needs.

Screen should look similar to this: enter image description here

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I know how to setup a second display; I had a 19" in there. When I plug in the new 23", it doesn't see it. – gravyface Jan 31 '13 at 17:06
If the 2nd display is on the vga then it probably only does device detection on boot. Depends on your graphics card/chipset as much as software settings. – James Snell Jan 31 '13 at 17:20
It's on DVI. I'll take a look at vid card settings. – gravyface Jan 31 '13 at 17:22
@Kruug et al: Please read carefully. There's two monitors (I said "secondary", root word "second" as in "monitor #2"). clearly you don't have an answer; not sure why you're still flogging your "dual display 101" answer. Can't believe this was upvoted either. – gravyface Jan 31 '13 at 20:42
My very first comment was "I know how to setup a second display"... it really doesn't get any more clear than that. Where I work, when people say I want a second monitor... it might just mean that they want a.. wait for it... second monitor. – gravyface Jan 31 '13 at 20:52

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