VMD-L Mailing List

From: Clarinet (clarinet_at_atlas.cz)
Date: Wed Nov 21 2012 - 07:03:03 CST

Hi,

The remote machines run Debian, various versions including the latest
stable version. The OpenGL libraries on the remote machines are MESA,
the local machine has actual nVidia drivers installed (I guess they come
with their own OpenGL libraries).

We only had 2 out of more than 20 local machines with this kind of
problems - one of them was running Ubuntu, but was reinstalled and now
runs Debian - the problem did not reappear after re-installation. Other
machines (Ubuntu and Debian) have no problems with VMD.

Setting VMDSIMPLEGRAPHICS to 1 on remote machine helps.

So does it look like some sort of incompatibility between OpenGL on
local and remote machines?

Jiri Polach

On 11/20/2012 17:51, John Stone wrote:
> Hi,
> What kind of machine are you logging into?
> If lines and dots don't display, it seems like this may be
> some sort of vertex array remote display issue. It could be
> a problem with either the local machine or the remote machine.
> What OpenGL is on the remote machine?
>
> You could also try setting the environment VMDSIMPLEGRAPHICS to 1
> and see if that has any effect.
>
> Cheers,
> John Stone
> vmd_at_ks.uiuc.edu
>
> On Tue, Nov 20, 2012 at 03:04:09PM +0100, Clarinet wrote:
>> Hi all,
>>
>> We have the following problem:
>>
>> We have a fairly recent machine with GeForce GT220 card that runs
>> Ubuntu. The newest graphics card drivers from nVidia are installed.
>>
>> When I login to a remote server (with 'ssh -X') and run VMD (version
>> 1.9.1) there to display a molecule on the local computer, everything
>> opens ok but the molecule is not visible if the drawing method is
>> "lines" or "dots". To see the molecule I have to switch to e.g.
>> "licorice", but the manipulation is much slower then, of course.
>>
>> If the same molecule is open in a local installation of VMD, everything
>> seems ok - the molecule is visible even when "lines" representation is
>> selected.
>>
>> Does anyone have an idea where to look for a reason?
>>
>> Thank you.
>>
>> Best regards,
>>
>> Jiri Polach
>