The issue I am having a problem with is a mouse cursor freeze when I select an object with no command active.
When I select an object, the cursor will freeze for about a second before I can move it again. When I hit escape to de-select the object the same thing happens.
This is with Acad LT 2011. WinXP.
Normal operation this computer runs ACAD quite fast, no particular lags or anything except maybe when selecting to copy or move very large groups of objects, or when switching between layouts or to model space when there is a fair amount of stuff in the layout, or when regen on a large file size.
This mouse cursor lag was not always the case, but at some point this problem appeared.
I have tried save, regen, regenall, closing the drawing, exiting ACAD LT, rebooting the computer.
It's very irritating, since so much of using ACAD is clicking and doing things with the mouse, that it really slows down my production, to have to get a cup of coffee every time I do a select action with the mouse.
About a week ago I installed the trial version of LT 2012 to see if it was different. When I opened the same dwg in 2012 there was no lag.
I then closed this and opened the dwg in 2011, and there was no lag. So it seems that the installation of the 2012 trial version changed something in the way 2011 operated.
It has been operating fine now with no lag until this morning. Now I have the lag again.
When I now open the same dwg in 2012, I now have this lag in 2012 as well.
I did not change any settings in 2012 or 2011 like hardware acceleration or whatever. I just suddenly had this lag, and now I can't seem to get rid of it.
Attached is a file that was made by opening ACAD LT 2011 and drawing a few lines, then saving it. No template used.
On my computer with this file, I get the mouse cursor lag when I select a line.
More info on desktop computer, the one with the laggy cursor problem.
I have an NVidia GeForce 7950 GT graphics card. Up to date driver.
I use a Logitech Anywhere mouse with the SetPoint software to map buttons.
I also have a Dell M6600 Win7 64 bit, 8 GB RAM. Same mouse setup. Also 2011 LT.
These same dwgs opened in it have no cursor lag. They act the same as my desktop did before the lag started.
If I open the drawings on the laptop (no lag), change them, save them, and re-open on the desktop, the desktop still has the lag.
So it appears to be not a dwg file issue, but rather an ACAD program issue of some sort. And an issue that was temporarily fixed by installation of the 2012 trial version. But now after a week or so, the problem has re-appeared and now affects both the 2011 and 2012 trial version.
Is the LAYER palette on? Turn it off, don't just minimize/hide i.
Did you turn on Selection Cycling?
Did you turn on Quick Properties?
Show Transparency On?
Show Lineweights On?
The last five are buttons on the lower-left of your screen you may have tapped.
I have tried turning these things on and off. No change.
Also, what is interesting, or perhaps telling, is that the lag recently started again, spontaneously, after I did a move command.
No change to any of these options.
1.I always leave the layer pallette off while drawing. Only turn on when needed, then off again. It does affect speed.
2.Selection cycling always off. Didn't particularly like it.
3.QP always off, gets in the way.
4.Transparency (for pallets) default, set to 100%. Changing to off for all makes no difference to mouse lag issue. Transparency button (lower left) usually off, still off, on and off makes no difference.
5.Lineweights on, turning off makes no difference to lag.
6.Dynmode (-3) off on button. Makes no difference.
Now, mysteriously, after starting up ACAD once more, the cursor lag is gone.
Now when I click on an object, it gets selected, with no mouse lag whatsoever.
I've been having the same problem with AutoCAD 2009 the past couple days and think I may have just found the cause.
I started checking what other apps were running on my computer and found McAfee taking up about 50% CPU. Turned off On-Access Virus Scanning and viola, no more lag. Turned it on and I'm back in lag city.
What's wierd is that I've never had this problem before. I'm wondering if there was some sort of update on McAfee that has caused this.
I use McAfee Anti Virus Plus, version 11.0. It updates itself all the time.
I looked over the menus, and I don't see any On-Access Virus Scanning option. That phrase is just not in there anywhere.
It does have "Real-Time Scanning", that is always on except when I am installing a new program.
This feature has been on continuously while I had zero mouse lag, and during the time I had the mouse lag, and now it's still on while I currently have zero mouse lag (thankfully).
Maybe this On-Access scanning is similar to the Real-Time Scanning.
Also on my laptop, which has not had the mouse lag problem, it has always been on.
I did check at the time I had the lag, though, and made sure that the AV was not running a HD scan. That will slow things down sometimes. So that wasn't it.
It is possible McAfee has changed something, it updates frequently and does not pester me with asking for approval.
If I get the mouse lag again, I will do as joe1979 did and look for CPU usage, and play with McAfee settings.
I had the same issue you are describing and it drove me crazy. I checked all the discussion threads and tried all the suggestions and then by pure chance I solved the issue. For me it was simply this:
Check to see if you have any Unreconciled New Layers. I simply reconcile the layer and my mouse stopped lagging/stuttering. If the other suggestions don't work, see if you have that issue. That worked for me.
Hope it helps,