Tim, How does one install VirtualGL and its dependencies on their system?
Thanks -----Original Message----- From: freesurfer-boun...@nmr.mgh.harvard.edu [mailto:freesurfer-boun...@nmr.mgh.harvard.edu] On Behalf Of Timothy Vickery Sent: 30 September 2009 18:12 To: Nick Schmansky Cc: Ahmed, F, Me <fah...@sun.ac.za>; Freesurfer Mailing List; Abe, Sumiko Subject: Re: [Freesurfer] tksurfer I have another suggestion. When I am logged to my machine locally, tksurfer works but only if I enable auto-redraw AND the color scale bar. However, when I log in remotely (via FreeNX), I get the same sliver problem described here. I found a workaround, which is to use VirtualGL. If you can install VirtualGL on your system, then you can run tksurfer like so: /opt/VirtualGL/bin/vglrun tksurfer bert lh inflated The idea of VirtualGL is to force the hardware on the server to run the rendering commands, and then stream the resulting images to the client, rather than forcing the client to do the rendering. Thus, I would expect that using VirtualGL from a local session would be exactly the same as not using it from a local session (only slower). Strangely, tksurfer actually works better for me when I use VirtualGL, even if I am running a local session! That is, I no longer have to enable auto-redraw and a color scale bar to see the surface. So if you can install VirtualGL and its dependencies on your system, it's possible it will improve tksurfer reliability even on local sessions. For some reason. Note that this may impose a performance penalty, but it is not noticeable on my setup. -Tim On Wed, Sep 30, 2009 at 11:46 AM, Nick Schmansky <ni...@nmr.mgh.harvard.edu> wrote: > Abe, > > This tksurfer display problem has been a difficult one to debug, due to > the complexity of opengl and graphics drivers, and the lack of error > codes (at least that I can find). > > Sebastian mentions some possible workarounds in his email. The first > one to try, assuming you have an Nvidia graphics card, is to update the > driver. To do this: > > su root > /sbin/init 3 > /usr/bin/nividia-installer --update > > (follow the instructions) > > often times this update fixes the tksurfer 'sliver' problem. outside of > that, you can try overriding the mesa drivers. you'll need to talk to > your sysadmin to do that. > > Nick > > > On Wed, 2009-09-30 at 05:50 -0700, Abe, Sumiko wrote: >> We have same problem. Any advise would be great appreciated. >> >> >> >> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> Sumiko Abe, Ph.D >> Dept. of Psychiatry & Human Behavior >> University of California, Irvine >> 5251 California Dr, #204 >> Irvine, CA 92697 >> >> Tel: 1-949-824-2972 >> E-mail: sumi...@uci.edu >> >> >> >> >> >> ______________________________________________________________________ >> From: freesurfer-boun...@nmr.mgh.harvard.edu >> [mailto:freesurfer-boun...@nmr.mgh.harvard.edu] On Behalf OfAhmed, F, >> Me <fah...@sun.ac.za> >> Sent: Wednesday, September 30, 2009 1:31 AM >> To: Freesurfer Mailing List >> Subject: [Freesurfer] tksurfer >> >> >> >> >> Hello, >> >> >> >> >> >> I'm trying to view and check the smoothing and inflation surfaces, the >> white and pial surfaces for "bert" using tksurfer as I'm trying to get >> used to using Freesurfer, but I'm a little confused to what I'm >> seeing. When I type in: "tksurfer bert lh inflated" for example, I >> only see a very small section at the very end of the image.is this >> correct? When I view the curv files, I do see a green pattern overlaid >> on the inflated surface, however it's still so small. When I view the >> pial and white surfaces, again, the section displayed is very small, I >> don't know if this is correct or if this is what I am supposed to be >> seeing? Also, when I type in: "tksurfer bert lh sphere", I see nothing >> at all. >> >> >> >> >> >> If someone could shed some light on the matter I'd be extremely >> grateful. >> >> >> >> >> >> Thank you >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> ______________________________________________________________________ >> This message contains confidential information and is intended only >> for the individual named. If you are not the named addressee you >> should not disseminate, distribute or copy this e-mail. 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The sender therefore does not accept liability for >> any errors or omissions in the contents of this message, which arise >> as a result of e-mail transmission. >> _______________________________________________ >> Freesurfer mailing list >> Freesurfer@nmr.mgh.harvard.edu >> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
