[Therion] loch performance issues on linux

[Wookey]

+++ Thomas Holder [2009-02-07 14:30 +0100]:
> Hi,
> 
> I'm using the "Loch" 3D-viewer on Linux. When moving and rotating the 
> picture it flickers much. The autorotation is almost useless, it's so 
> demanding on CPU and memory that it becomes unresponsive after few 
> seconds. Other OpenGL applications like Google Earth work fine. The same 
> lox-file also works fine with Loch on Windows XP.
> 
> Where is the problem? Any suggestions?
> 
> OpenGL Information:
> GeForce 8400 GS
> NVIDIA Driver Version: 173.14.15

Your problem is probably this video card. Nvidia only provide
proprietary drivers so things don't always work right. If you are
using the free 'nv' xorg driver then that is 2D only so OpenGL will be
emulated in software. It sounds like this is happening, as you say
Aven is similarly slow. I don't know why google earth might work
better, but that's proprietary too so maybe they have special nvidia
magic?

See which version of mesa you have installed (various *mesa* packages
are normally responsible for the opengl support) and which X driver you
are using. noveau is the free 3D nvidia driver.

I've never really messed with this so can't be more specific.

I've never even tried using loch on this machine which also has an
nvidia card because I know it won't work with nv. I will finally
(after several years of waiting :-) be getting amchine next week which
should be loch-capable. I look forward to giving it a go. 

Wookey
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