File causes CPU lag when using OFFSET ACADM 2015

[Anonymous]

A user is trying to offset a line in a drawing and is experiencing extreme lag when doing so. This occurs only on this particular drawing and the windows process "usermode font driver host" utilizes 5-15% CPU and Autodesk utilizes ~25% CPU after selecting the offset option. We have purged the drawing and tried with and without hardware acceleration. We have updated all drivers and firmware.

[The subject line of this post has been edited for clarity by cheryl.buck from: Extreme Lag when Offset, Usermode Font Driver Host CPU Spike, Autocad 2015]

[cheryl.buck · Accepted solution]

Hi @Anonymous,

I see that you are visiting as a new member to the AutoCAD Mechanical forum. Welcome to the Autodesk Community!

I am sorry to hear that one of your drawings is causing a CPU spike. Often when this sort of thing occurs, it is due to something in the drawing, so that was a good idea to check the drawing. There are a couple other cleanup tools available in AutoCAD that you could try, see the following Autodesk Knowledge Network (AKN) article:

How to repair corrupt AutoCAD files

Export objects to a drawing file with WBLOCK command

Also, I did see a post in another product forum in which one user stated that they were able to stop the Fontdrvhst.exe from causing a lot of data chatter on their CPU by turning hardware acceleration off, then updating their graphics card driver. I am not sure how this relates, but thought it was worth mentioning.  

How to enable or disable hardware acceleration in AutoCAD 

Video card driver updates can be downloaded from the manufactures website. See the following links:

NVIDIA Driver Download

AMD Driver Download

Intel Driver Update Utility

Please leave a post letting the community know if this was helpful.

All the best, 

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[cheryl.buck]

Hi @Anonymous,

I am checking back to see if you were able to resolve the issue with OFFSET in AutoCAD Mechanical 2015.

Please add a post letting the community know, I am happy to assist further if not. 

All the best,