Second (!) external monitor lagging after OS X update

Hi,
I have a second external monitor connecte to my MBA mid-2012. This monitor runs via a USB - DVI link. The first external monitor runs via the thunderbolt connection. Under the previous OS X things were very fine - now, there is a delay on the second external (USB - DVI) monitor. The mouse moves quite slowly. Any solution to this? It's quite annoying.
I use a Terratec Connect A1 card for the link.
thx

I have noticed something similar on my Win7x64 system, but am not able to reliably reproduce it. It seems, for me at least, to be a combination of +Clarity and Lens Profile Correction which will always trigger an observable screen redraw when moving from segment to segment in 1:1 view mode. The variable is the delay.....most often it's a fleeting effect, but occasionally there's a more obvious delay in redrawing the image display. I suspect the more obvious delay is, in addition to the +Clarity and Lens Correction, some internal resource utilisation over a longer Lightroom session....certainly every time I've encountered it a Lightroom restart has cleared it up.
Don't know it that helps, or gives you any pointers to reducing the impact. Because of another "issue" with Lens Corrections (when it's applied, Spot Removal work gets slower), I tend to apply it last of all when editing pictures....so that also helps avoid this 1:1 screen redraw problem.

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Syllogistic wrote:
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Second (!) external monitor lagging after OS X update

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