VMD-L Mailing List

From: Tristan Croll (tristan.croll_at_qut.edu.au)
Date: Wed Nov 16 2011 - 19:26:21 CST

I just mentioned a similar slow-down problem when discussing a different topic. I'm running Linux (CentOS 6) and when running VMD (particularly when using it with the Novint Falcon) I'd regularly start getting massive slowdown issues, which would persist for a couple of minutes after killing vmd. Turning off the X11 Composite extension seems to have solved it.

Cheers,

Tristan

Tristan Croll
Lecturer
Institute of Health and Biomedical Innovation
Queensland University of Technology
60 Musk Ave, Kelvin Grove QLD 4059, Australia
+61 7 3138 6443

On 17/11/2011, at 7:04 AM, "John Stone" <johns_at_ks.uiuc.edu> wrote:

>
> I would guess that you are running low on available GPU memory.
> You didn't say anything about what OS you're running, but the most
> recent operating systems consume more GPU resources for desktop
> window management than they used to, and this combined with the
> need for GPU ram for each VMD instance may be running your new
> laptop low on GPU memory, leading to some noticable performance
> loss. Does the speed change if you resize the VMD windows to be small?
>
> Cheers,
> John Stone
> vmd_at_ks.uiuc.edu
>
> On Mon, Nov 14, 2011 at 02:51:46PM -0800, lam nguyen wrote:
>> Hi all,
>> There is an annoying VMD problem with my desktop. If I open several VMD
>> windows, from the third one they slow down a lot. It is a new machine so I
>> don't think the power is the problem. Because my 4 years old laptop can
>> handle many VMD windows without slowing them down. I wonder if this has to
>> do with Nvidia card?
>> Is there anyone having the same trouble?
>> Lam
>
> --
> NIH Resource for Macromolecular Modeling and Bioinformatics
> Beckman Institute for Advanced Science and Technology
> University of Illinois, 405 N. Mathews Ave, Urbana, IL 61801
> http://www.ks.uiuc.edu/~johns/ Phone: 217-244-3349
> http://www.ks.uiuc.edu/Research/vmd/ Fax: 217-244-6078