AutoCAD 2011

[#1]

Hello,

My Department recently went to Dual Monitors for our users.  We are using a 24" and a 19" set-up running Inventor 2011 and AutoCAD 2011.  We have been experiencing some video lag and other related issues when using AutoCAD since the change.

Is this a known issue?  Is there a fix or a driver change necessary?  Please help.

We are using Windows XP Pro 64-bit as our OS.

[#2]

you might also update with the graphics card information - could be useful/pertinent for a better response....

[#3]

>>>...some video lag and other related issues...<<<
What does that mean exactly?

>>>...We are using Windows XP Pro 64-bit as our OS....<<<

And the rest of the system specs? Video card details?

[#4]

I'll guess that it's not a known issue.

I will give you the two machines that have had the most obvious issues.

1)   Dell 690, 8GB Ram, Quadro FX 4600 = 768MB RAM

2)   Dell 690, 8GB Ram, Quadro FX 3800 = 1024MB RAM

When I say lag I mean; the crosshair is very choppy when moving around the drawing window.  Also the dialogue boxes for Properties and Layer come up the contents of them shown an image of what was in the drawing window.  It will not clear out when dragged around.

One of the users unplugged his second monitor and the problem went away.

[#5]

You are describing symptoms of a video card driver choking under the pressure of AutoCAD: change the hardware acceleration settings in 2011 (if they are on, turn them off, if they are off, turn them on) and see if that helps.

Otherwise unplugging a monitor pretty much describes what the cards can handle.

[#6]

I'm sorry to be a lament, but please give some instruction on that.

Thanks in advance.

[#7]

look in the lower right corner of the desktop - one of the icons looks like a memory chip with a lightbulb.  right click and select hardware acceleration on/off....

[#8]

First you want to update your drivers for the video cards you are using.I find the best way to do that is on the autodesk support site. Then inside ACAD go to tools>options>sytem>performance settings>manual tune. Inside there you will see the options for the video. At the very top is hardware acceleration, if it's checked un check it, if it's unchecked check it. Hope that helps.

[#9]

I've experienced something similar, when using "dual view" set-up on XP.  When the drawing window (any drawing window, really) is extended onto the secondary monitor, panning etc. slow down down or become choppy.  As you noted, this disappears when you only have one monitor or the drawing window is only on the primary monitor.  It seems hardware acceleration is dicey under XP on secondary monitors.  Aside from the default dialog/window position being where the two montiors join I seem to do OK using a "spanned" display set up.  Win XP is still running strong but *is* getting a little long in the tooth.  I have no idea whether the situation is the same under Win 7, but its on the list of things to test during our migration process.