FreeCAD laggy and crashes

[jlt199]

Linux Fedora 33
FrreCAD 0.18
32GB RAM
AMD Ryzen 9 3900xt
Radeon RX 5500 XT graphics

Why is FreeCAD so laggy and crashing so often? My first PC build and I'm new to FreeCAD too. Did I buy the wrong thing?

[jmaustpc]

Why is FreeCAD so laggy and crashing so often?

it's not. So possibly an old or a packaging issue? Where did you get FreeCAD from, which version/packaging system?

FrreCAD 0.18

install FreeCAD 0.19 and see if your problems disappear. If you still get problems then post the error messages. FreeCAD uses OpenGL, it's not impossible that your are seeing some GPU driver issue.

Linux Fedora 33

You could try Ubuntu or Kubuntu, and then have access to the daily FreeCAD from the daily PPA.

Did I buy the wrong thing?

No..... Oh wait, yes, that is a terrible computer so terrible I suggest you through it away, in fact I will take it away for you! Only joking, I am actually rather jealous!

[jmaustpc]

I assume that you are not trying to run FreeCAD in a virtual machine? You have installed a real Linux partition?

[jlt199]

Real partition, I'm only running Linux on my computer.

Great, I thought I had a hardware incompatibility. I will try and figure out how to update FreeCAD and switch to Ubuntu if I can't

[jlt199]

I installed from the terminal

Code: Select all

sudo dnf install freecad

[wmayer]

Why is FreeCAD so laggy and crashing so often? My first PC build and I'm new to FreeCAD too. Did I buy the wrong thing?

Well this could be an issue with Qt and the graphic driver. Since you use FreeCAD v0.18 the chance is high that it still uses the old Qt4 version. Switch to v0.19 that comes with Qt5.

What you should also try is to run FreeCAD from a terminal. In case it crashes it shows you a call stack and this helps to better locate the problem.

[jlt199]

Thanks, I have update FreeCAD 0.19. Now my scroll wheel isn't working. Any ideas?

Also, what is the command to run from the terminal please?

[heda]

Start_up_and_Configuration

small general note, might be time to improve this section in Frequently_asked_questions#FreeCAD_crashes_on_startup

[jmaustpc]

Thanks, I have update FreeCAD 0.19. Now my scroll wheel isn't working. Any ideas?

there was a bug with one version of QT that effected the mouse wheel recently, but that was a QT bug not FreeCAD. I have no idea if that is the problem now or not though. Perhaps you could try the mouse wheel in some other QT5 based application and see if it works there or not?

Also, what is the command to run from the terminal please?

you just simply type "freecad" in the terminal/command line, if you type "freecad -h" you will get the help data that explains all the options.

Note that on Ubuntu you can install both a "release" version 0.18 and a "daily" version 0.19
compiled daily from our master branch and distributed/updated via your package manager via our PPA. To run the "daily" freecad version, the commands are the same except rather than typing "freecad", you type "freecad-daily".

The help data will tell you how to write a log file.

[jlt199]

Thanks, I tried the command freecad, but I got an error

I hadn't realised terminal is case sensitive. "FreeCAD" worked

I have no idea what to do about Qt5 though. I have no idea which applications use it, or even what it is.