[OpenSCAD] Severe lag when rotating model in viewing area

MichaelAtOz oz.at.michael at gmail.com
Wed Oct 12 19:07:44 EDT 2016

Hi, welcome to the forum. Your post is still flagged as "This post has NOT
been accepted by the mailing list yet", so nobody gets it unless they look. 
You need to subscribe to the  mailing list
<http://forum.openscad.org/mailing_list/MailingListOptions.jtp?forum=1>  ,
and respond to the registration email.

I have quoted it below for others to see.

Intel video has been problematic. 

Until someone with more direct Intel based experience replies, try setting
Edit/Preferences/Advanced-tab/Force-goldfeather option. 
Tho I think that has more an effect on the graphics looking wrong, but you
never know.

Oh, and posting the content of Help/Library-info will probably help.

leebc wrote
> I've been running the older version of OpenSCAD that came with Ubunti
> 14.04 on an OLDER (10 years old) laptop, and have just switched to Ubuntu
> 16.04 on a "newer" laptop.  I was not experiencing this problem before.
> When I try to drag and rotate an object, there is severe lag in the
> graphical redraw.  On the magnitude of taking 5 seconds to rotate 5
> degrees. and precessing from there, refreshing a new rotation every few
> seconds until it finally catches up with me 30+ seconds later.
> My current setup is:
>      Ubuntu (Lubuntu) 16.04
>      OpenSCAD 2015.03-1 (the Ubuntu package
>      Sony Vaio laptop with 
>           Intel Corporation Mobile 4 Series Chipset Integrated Graphics
> Controller [8086:2a42] (rev 07)
> I have looked into the video card, and from what I've found, this should
> use the i915 driver.  Intel releases drivers for this card, and the latest
> version (from this spring) is listed on Intel's site as included in Ubuntu
> 16.04.
> Can someone point me in a direction I can go to  try to resolve this
> issue?
> I really don't think I should be having a worse experience on new system
> with a faster processor, more RAM and a never version of openscad.

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