Kristian.


Thank You!


That workaround helped a great deal. I followed the steps described in the wiki, and it worked.


The OpenGL version string is now 2.1, and I no longer receive error messages.


The only additional steps were to place that mesa directory in a selected path,e.g.,/path/mesa-10.1.3/. Substitute that path for `pwd` in this line:


export LD_LIBRARY_PATH=`pwd`/build/linux-x86_64-debug/gallium/targets/libgl-xlib/:${LD_LIBRARY_PATH}
becomes


export LD_LIBRARY_PATH=/path/mesa-10.1.3/build/linux-x86_64-debug/gallium/targets/libgl-xlib/:${LD_LIBRARY_PATH}


Added the above line with the modified path to my .bashrc file.


Works fine now each time I call fsleyes from the command line.


One thing I noticed is that fsleyes used about 23% CPU power even while open, but idle. Is this normal?


Thanks again.


d.m.


From: FSL - FMRIB's Software Library <[log in to unmask]> on behalf of Kristian Loewe <[log in to unmask]>
Sent: Wednesday, August 23, 2017 4:33:59 PM
To: [log in to unmask]
Subject: Re: [FSL] fsleyes installation in Ubuntu 14.04
 
Hi d.m. and Paul,

I think, x2go only supports GLX 1.2.

Have you tried this workaround:
http://wiki.x2go.org/doku.php/wiki:development:glx-xlib-workaround ?

Cheers,

Kristian


On 23.08.2017 11:23, paul mccarthy wrote:
> Hi d.m.,
>
> Currently the graphics hardware on your remote machines is not being
> used at all - GLX redirects all graphics calls to the local machine that
> you connect from. If you want to use the graphics cards on your server,
> then the only way I am aware of is via VirtualGL.
>
> If you want to continue using x2go/freenx, then unfortunately I don't
> know of a workaround for the problem you are experiencing. I have not
> been able to reproduce it. Hopefully Kristian or somebody else may be
> able to give some advice.
>
> Cheers,
>
> Paul
>
> On 22 August 2017 at 19:18, d m <[log in to unmask]
> <mailto:[log in to unmask]>> wrote:
>
>     Kristian and Paul, thank you for your feedback.
>
>
>     Yes, we do connect remotely to our server using x2go/freenx.
>
>
>     I tried clearing the LIBGL_ALWAYS_INDIRECT environment variable. It
>     still did not work. I think the problem is that I have more than one
>     graphics card on our machine. We have a Matrox VGA controller and
>     two NVIDIA 3-D controllers installed on the machine.
>
>
>     We have other servers with one card installed (the same VGA
>     controller ), and fsleyes works fine.
>
>
>     Somehow we are reduced to Opengl 1.2 and OpenGL renderer string:
>     Mesa GLX Indirect with our hybrid graphic card setup. Is there a
>     workaround or solution for this to get fsleyes running?
>
>
>     Thanks.
>
>
>     d.m.
>
>     ------------------------------------------------------------------------
>     *From:* FSL - FMRIB's Software Library <[log in to unmask]
>     <mailto:[log in to unmask]>> on behalf of Kristian Loewe
>     <[log in to unmask] <mailto:[log in to unmask]>>
>     *Sent:* Tuesday, August 8, 2017 4:03:02 PM
>     *To:* [log in to unmask] <mailto:[log in to unmask]>
>     *Subject:* Re: [FSL] fsleyes installation in Ubuntu 14.04
>     Hi,
>
>     If indirect rendering is not possible, another option is to use
>     VirtualGL. With VirtualGL, you can use the server's GPU for rendering
>     and have the rendered results sent to your local or virtual X server.
>     Depending on the graphics setup, the network speed, and the data size,
>     this approach may also give you noticably better performance than
>     indirect rendering.
>
>     Cheers,
>
>     Kristian
>
>     On 08.08.2017 20:10, paul mccarthy wrote:
>     > Hi d.m.,
>     >
>     > I guess you are running FSLeyes on a remote server, right? Try clearing
>     > the LIBGL_ALWAYS_INDIRECT environment variable, as documented here:
>     >
>     > https://users.fmrib.ox.ac.uk/~paulmc/fsleyes/userdoc/latest/troubleshooting.html#opengl-1-4-or-newer-is-required-detected-version-1-2
>     <https://users.fmrib.ox.ac.uk/~paulmc/fsleyes/userdoc/latest/troubleshooting.html#opengl-1-4-or-newer-is-required-detected-version-1-2>
>     >
>     > Unfortunately if this doesn't work, I have not yet figured out a
>     > solution for this problem.
>     >
>     > Cheers,
>     >
>     > Paul
>     >
>     > On 8 August 2017 at 17:45, d m <[log in to unmask] <mailto:[log in to unmask]>
>     > <mailto:[log in to unmask]>> wrote:
>     >
>     >     Michael,
>     >
>     >
>     >     Thanks for the suggestion.  That worked, but now I get the following
>     >     error message after typing "./fsleyes":
>     >
>     >
>     >     WARNING          __init__.py  595: create          - GLContext
>     >     callback function raised RuntimeError: OpenGL 1.4 or newer is
>     >     required (detected version: 1.2
>     >     Traceback (most recent call last):
>     >        File "fsleyes/gl/__init__.py", line 589, in create
>     >        File "fsleyes/main.py", line 377, in realCallback
>     >        File "fsleyes/gl/__init__.py", line 314, in bootstrap
>     >     RuntimeError: OpenGL 1.4 or newer is required (detected version: 1.2
>     >
>     >     Have you or anyone seen this message? If so, what was the solution?
>     >
>     >
>     >     Thanks.
>     >
>     >
>     >     d.m.
>     >
>     >     ------------------------------------------------------------------------
>     >     *From:* FSL - FMRIB's Software Library <[log in to unmask] <mailto:[log in to unmask]>
>     >     <mailto:[log in to unmask]>> on behalf of Michael Firbank
>     >     <[log in to unmask] <mailto:[log in to unmask]>
>     >     <mailto:[log in to unmask]
>     <mailto:[log in to unmask]>>>
>     >     *Sent:* Friday, July 7, 2017 5:16:57 PM
>     >
>     >     *To:* [log in to unmask] <mailto:[log in to unmask]>
>     <mailto:[log in to unmask]>
>     >     *Subject:* Re: [FSL] fsleyes installation in Ubuntu 14.04
>     >
>     >     Hello
>     >
>     >
>     >     You can unzip the folder wherever you like. Probably the $FSLDIR/bin
>     >     is not the best place.
>     >
>     >     In any case the fsleyes file needs to be in a directory on your path.
>     >
>     >     if you need to see what that is, type
>     >
>     >     echo $PATH
>     >
>     >
>     >     If you unzipped it in the $FSLDIR/bin directory, the actual
>     >     executable will be in
>     >
>     >     $FSLDIR/bin/FSLeyes
>     >
>     >     if you cd to that directory and type
>     >
>     >     ./fsleyes
>     >
>     >     then it should start.
>     >
>     >
>     >     you can create a link to the fsleyes program by changing directory
>     >     to $FSLDIR/bin and then
>     >
>     >     ln -s FSLEYESDIRECTORY/fsleyes fsleyes
>     >
>     >
>     >     where FSLEYESDIRECTORY is the directory where fsleyes is. so you
>     >     probably want
>     >
>     >     ln -s $FSLDIR/bin/FSLeyes/fsleyes  fsleyes
>     >
>     >
>     >     Hope that helps
>     >
>     >
>     >     Michael
>     >
>     >
>     >     ------------------------------------------------------------------------
>     >     *From:* FSL - FMRIB's Software Library <[log in to unmask] <mailto:[log in to unmask]>
>     >     <mailto:[log in to unmask]>> on behalf of d m <[log in to unmask]
>     <mailto:[log in to unmask]>
>     >     <mailto:[log in to unmask]>>
>     >     *Sent:* 07 July 2017 18:25
>     >     *To:* [log in to unmask] <mailto:[log in to unmask]>
>     <mailto:[log in to unmask]>
>     >     *Subject:* Re: [FSL] fsleyes installation in Ubuntu 14.04
>     >
>     >     Michael,
>     >
>     >
>     >     Thanks for the reply.
>     >
>     >
>     >     I'm still somewhat confused. Where exactly do I unzip the folder?
>     >
>     >
>     >     Is it the $FSLDIR/bin/ directory?
>     >
>     >
>     >     If so, I added the folder and nothing changed.
>     >
>     >
>     >     Are there any further steps to complete before using fsleyes? Is
>     >     fslview no longer usable by adding the FSLeyes folder?
>     >
>     >
>     >     One thing I noticed, the neurodebian page only shows FSLeyes listed
>     >     for 16.04 and 17.04. Nothing for 14.04? Maybe that is the issue?
>     >
>     >
>     >     http://neuro.debian.net/pkgs/fsleyes.html?highlight=fsleyes
>     <http://neuro.debian.net/pkgs/fsleyes.html?highlight=fsleyes>
>     >     <http://neuro.debian.net/pkgs/fsleyes.html?highlight=fsleyes
>     <http://neuro.debian.net/pkgs/fsleyes.html?highlight=fsleyes>>
>     >
>     >
>     >     Thanks.
>     >
>     >
>     >     d.m.
>     >
>     >     ------------------------------------------------------------------------
>     >     *From:* FSL - FMRIB's Software Library <[log in to unmask] <mailto:[log in to unmask]>
>     >     <mailto:[log in to unmask]>> on behalf of Michael Firbank
>     >     <[log in to unmask] <mailto:[log in to unmask]>
>     >     <mailto:[log in to unmask]
>     <mailto:[log in to unmask]>>>
>     >     *Sent:* Friday, July 7, 2017 10:10:29 AM
>     >     *To:* [log in to unmask] <mailto:[log in to unmask]>
>     <mailto:[log in to unmask]>
>     >     *Subject:* Re: [FSL] fsleyes installation in Ubuntu 14.04
>     >
>     >     Hello
>     >
>     >     For 16.04 I just downloaded and unzipped the relevant  file from
>     >
>     >     https://fsl.fmrib.ox.ac.uk/fsl/fslwiki/FSLeyes
>     <https://fsl.fmrib.ox.ac.uk/fsl/fslwiki/FSLeyes>
>     >     <https://fsl.fmrib.ox.ac.uk/fsl/fslwiki/FSLeyes
>     <https://fsl.fmrib.ox.ac.uk/fsl/fslwiki/FSLeyes>>
>     >
>     >     FSLeyes - FslWiki - fsl.fmrib.ox.ac.uk <http://fsl.fmrib.ox.ac.uk>
>     >     <https://fsl.fmrib.ox.ac.uk/fsl/fslwiki/FSLeyes
>     <https://fsl.fmrib.ox.ac.uk/fsl/fslwiki/FSLeyes>>
>     >     fsl.fmrib.ox.ac.uk <http://fsl.fmrib.ox.ac.uk>
>     <http://fsl.fmrib.ox.ac.uk>
>     >     FSLeyes (pronounced fossilise) is the new FSL image viewer, released
>     >     with FSL 5.0.10. FSLeyes can either be installed as a standalone
>     >     application, or can be installed ...
>     >
>     >     seems to work ok.
>     >
>     >     Michael
>     >
>     >     *From:*FSL - FMRIB's Software Library [mailto:[log in to unmask] <mailto:[log in to unmask]>
>     >     <mailto:[log in to unmask]>] *On Behalf Of *d m
>     >     *Sent:* 07 July 2017 15:03
>     >     *To:* [log in to unmask] <mailto:[log in to unmask]>
>     <mailto:[log in to unmask]>
>     >     *Subject:* [FSL] fsleyes installation in Ubuntu 14.04
>     >
>     >     Hello,
>     >
>     >     How does one install fsleyes with Ubuntu 14.04? We have installed
>     >     fsl using neurodebian.
>     >
>     >     Thanks.
>     >
>     >     d.m.
>     >
>     >
>
>