I've been looking into the issues with ACAD LT 2015 misbehaving for some time now and I've not been able to find a resolution and the support service from our license supplier has been terrible. So I'm hoping that someone here may be able to provide an answer or a few more ideas of things to try.
We have 4 computers all running ACAD LT 2015 and experiencing the same problem with all of them. Due to the issue appearing on all of the machines, I have singled out one for testing.
The Issue: Drawings will become slower and slower to respond to the point of not responding due to heavy input/selection lag. It has gotten to the point where all users on ACAD LT 2015 are experiencing these slowdowns seldom causing the application to crash or enter a none responsive state.
System Information:
------------------
System Information
------------------
Operating System: Windows 7 Professional 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.140303-2144)
Language: English (Regional Setting: English)
System Manufacturer: Dell Inc.
System Model: Precision T1600
BIOS: Default System BIOS
Processor: Intel(R) Xeon(R) CPU E31225 @ 3.10GHz (4 CPUs), ~3.1GHz
Memory: 8192MB RAM
Card name: NVIDIA Quadro 600
Manufacturer: NVIDIA
Chip type: Quadro 600
DAC type: Integrated RAMDAC
Device Key: Enum\PCI\VEN_10DE&DEV_0DF8&SUBSYS_083510DE&REV_A1
Display Memory: 4095 MB
Dedicated Memory: 977 MB
Shared Memory: 3118 MB
Current Mode: 1920 x 1080 (32 bit) (60Hz)
Driver File Version: 9.18.0013.3182 (English)
Driver Version: 9.18.13.3182
Previously raised questions from our CAD support company.
1. Any messages in the Event Viewer? Please send those too.
There are no events in Event Viewer
2. What version of Adobe Reader is installed? Have any earlier versions been on this computer?
Adobe Reader XI v11.0.07
3. Do you have Adobe Shockwave Flash installed?
Shockwave Flash: 32bit; ActiveX: v14.0.0.145; Plug-in: v14.0.0.145
4. Do you have MS Silverlight installed?
MS Silverlight: Installed; 64bit; Version: 5.1.30514.0
As part of troubleshooting it was suggested to downgrade from .NET v4.5.1 back to v4.5: This has now been tested in both and still shows the issues.
Additionally, I have removed all instances of the Visual C++ Redists & reinstalled from the installers on that come with LT 2015.
ACAD LT 2015 has been uninstalled and reinstalled cleanly several times on some of the machines. The one that I was testing on was a fresh installation of windows. Files that were being used and referenced are all stored locally on a clean/default ACAD profile.
I have also tried running through the general list of commands and tweaks to speed up previous versions of AutoCAD however it doesn't seem to matter what I try this is still evident in the drawings.
All drawings have been tested in ACAD 2012 and ACAD LT 2014 and they work without any issues. This has been tested on machines with lower specs as well as on another machine with identical hardware to that which I've listed. I've provided a video to show one of the milder cases that appeared today, if anybody has any suggestions or ideas on how to resolve this I would be grateful!
(Posted as a link because it didn't wish to add from the video tool) https://www.youtube.com/watch?v=5j24AMhqL38