Paul,

I thought it might be worth trying a newer version of Xvnc.  That
makes it worse.

$ cat /tmp/fsleyes-vnc.txt
With Xvnc TigerVNC 1.6.0 - built Dec 24 2015 16:05:46

$ fsleyes
08:38:30: Debug: Adding duplicate image handler for 'Windows bitmap file'
/usr/local/fsl-5.0.11/bin/FSLeyes/notebook/notebookapp.py:46:
DeprecationWarning: zmq.eventloop.ioloop is deprecated in pyzmq 17.
pyzmq now works with default tornado and asyncio eventloops.
  ioloop.install()

and I get a mostly functional fsleyes that will open a .nii 4d series,
display volumes, and manually walk through them.

However when I instead use the newer Xvnc,

With Xvnc TigerVNC 1.9.0 - built Jul 16 2018 14:18:04


08:36:24: Debug: Adding duplicate image handler for 'Windows bitmap file'
   ERROR              main.py  476: initialise      - Unable to
initialise OpenGL!
wx._core.wxAssertionError: C++ assertion "ok" failed at
/home/vagrant/wxPython-4.0.1/ext/wxWidgets/src/unix/glx11.cpp(589) in
GetGLXVersion(): GLX version not found

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "fsleyes/gl/__init__.py", line 695, in __createWXGLCanvas
SystemError: <class 'wx._glcanvas.GLCanvas'> returned a result with an error set

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "fsleyes/main.py", line 473, in initialise
  File "fsleyes/gl/__init__.py", line 445, in getGLContext
  File "fsleyes/gl/__init__.py", line 587, in __init__
  File "fsleyes/gl/__init__.py", line 704, in __createWXGLCanvas
wx._core.wxAssertionError: C++ assertion "m_widget" failed at
/home/vagrant/wxPython-4.0.1/ext/wxWidgets/src/gtk/window.cpp(2857) in
DoSetSize(): invalid window

and fsleyes closes immediately.

Not sure whether that is of any help or not.

Thanks,    -- bennet

On Thu, Aug 23, 2018 at 8:56 PM Bennet Fauber <[log in to unmask]> wrote:
>
> Paul,
>
> This was from Mac OS X using RealVNC Viewer.  That VNC Viewer is 6.0.0
> (Oct 2016),   It also exhibits this behavior using Windows 7 (I
> believe) and RealVNC Viewer, probably of the same or newer vintage.
>
> VNC server version is
>
> Xvnc TigerVNC 1.6.0 - built Dec 24 2015 16:05:46
>
> -- bennet
>
> On Wed, Aug 22, 2018 at 9:33 AM paul mccarthy <[log in to unmask]> wrote:
> >
> > Hi Bennet,
> >
> > What client OS and VNC client are you using?
> >
> > Cheers,
> >
> > Paul
> >
> > On 22 August 2018 at 14:03, Bennet Fauber <[log in to unmask]> wrote:
> >>
> >> I have a virtual machine on which I installed XUbuntu 16.04.5 LTS.  I
> >> then used the fslinstall.py installation method to install FSL 5.0.11
> >> into /usr/local.  FSLeyes version 0.24.5, OpenGL version and
> >> compatibility 2.1, renderer llvmpipe (LLVM 6.0, 256 bits).
> >>
> >> Access to this machine is via SSH, and VNC is tunneled, so the X
> >> session is vncserver.
> >>
> >> FSLeyes seems to run fine for most everything -- we can load images,
> >> we can manually scroll through volumes, etc. -- but when we try to use
> >> movie mode, the volume counter increments but the display goes black
> >> -- no images, no crosshairs, nada.  Stopping the movie and reentering
> >> a volume number will restore the image.  Clicking the eye icon in the
> >> overlay list box once restores the crosshairs, and a second time the
> >> image of the current volume.
> >>
> >> Using the incrementer arrows in the Location box to scroll through
> >> volumes seems to work, except that for many volumes, it takes two
> >> clicks of the up/down triangles to advance/retreat one volume.  Not
> >> for all volumes, and there isn't a pattern, as near as I can discern.
> >>
> >> So, the summary is:  Movie mode displays a black screen.  I can
> >> manually advance through all volumes when not in movie mode, and all
> >> display, so I do not think there is a problem with the image file.
> >> The volume incrementer sometimes requires two clicks to move one
> >> volume.
> >>
> >> Any thoughts on this?
> >>
> >> Thanks,    -- bennet
> >>
> >> ########################################################################
> >>
> >> To unsubscribe from the FSL list, click the following link:
> >> https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=FSL&A=1
> >
> >
> >
> > ________________________________
> >
> > To unsubscribe from the FSL list, click the following link:
> > https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=FSL&A=1

########################################################################

To unsubscribe from the FSL list, click the following link:
https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=FSL&A=1