A quick update on my earlier posting: After disabling the "Composite" extension, I no longer
get the UBB warning in the Xorg.0.log, but I still get the error and slow drawing with tksurfer.

From: dhaglerjr@hotmail.com
To: freesurfer@nmr.mgh.harvard.edu
Date: Tue, 15 Mar 2011 12:07:56 -0700
Subject: [Freesurfer] tksurfer error

Hi,

In response to the message below, I have been getting the exact
same error when running tksurfer on a particular workstation.
tksurfer does display correctly, but the drawing is very slow, as if
running remotely (or not using the video card).  This happens with versions
3.0.5 and 4.5.0.

I tried uninstalling and reinstalling the nvidia driver, but that didn't help.

glxgears and glxinfo work fine, no warnings or error messages.

In Xorg.0.log, there is one warning:
(WW) NVIDIA(0): UBB is incompatible with the Composite extension.  Disabling
(WW) NVIDIA(0):     UBB.

After googling, I found that UBB stands for Unified Back Buffer.
http://http.download.nvidia.com/XFree86/Linux-x86/1.0-8178/README/appendix-k.html
This only applies to Quadro GPUs.  This particular workstation has this type:
NVIDIA GPU Quadro FX 580

I haven't yet found a solution.  Evan, do you have a Quadro GPU?
Did you find a solution?


Don

_________________________________________________________________________


Dear freesurfer community,

I am currently trying to view one of the surfaces generated by recon-all
command in tksurfer but when I enter the command:

tksurfer LuceHR_FS_SURF lh inflated.nofix

I receive a series of errors that look like this:

Received X error!
    Error code   : 1
    Request code : 147
    Minor code   : 181

    Error text : 'BadRequest (invalid request code or no such operation)'

Subsequently the surface window does not display what I would believe is the
surface I am trying to view and then the only way I can exit the tksurfer
environment is by exiting the terminal that I invoked it in.

Any ideas or solutions?

Thank you very much,

Evan Luther

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