Re: [PLUG] OpenGL over ssh

[Walt Mankowski via plug <plug@lists.phillylinux.org>]

Running some sort of remote desktop is certainly one of the options
I'll be looking into. I'm trying to see if it's possible without doing
that.

Walt

On Sat, May 21, 2022 at 03:43:19PM -0400, K.S. Bhaskar via plug wrote:
> Caveat: I have never tried something like this. Might it be an option to
> run Matlab on a virtual machine in the cluster and use SPICE for the
> display?
> 
> Regards
> – Bhaskar
> 
> On Fri, May 20, 2022 at 10:03 AM Walt Mankowski via plug <
> plug@lists.phillylinux.org> wrote:
> 
> > Hi all,
> >
> > I'm wondering if anyone has any tips on running OpenGL over ssh. At
> > work I've got a Linux workstation running Ubuntu 20.04.4. We've also
> > got a Linux cluster running CentOS.
> >
> > There are times when it would be useful to run an app on the cluster
> > that uses OpenGL. The most common one is Matlab. It prints out some
> > warnings but basically runs well enough for what I need to do. But
> > we've also got an internal app that won't run at all without OpenGL.
> >
> > I've confirmed that OpenGL is working OK on my workstation. glxgears
> > works fine, and glxinfo prints out a bunch of info. I naively thought
> > that all I needed was an ssh tunnel, but it turns out that doesn't
> > work. When I `ssh -Y` into the cluster and run glxinfo, it says
> >
> > $ glxinfo
> > name of display: 10.20.180.123:14.0
> > X Error of failed request:  BadValue (integer parameter out of range for
> > operation)
> >   Major opcode of failed request:  151 (GLX)
> >   Minor opcode of failed request:  24 (X_GLXCreateNewContext)
> >   Value in failed request:  0x0
> >   Serial number of failed request:  55
> >   Current serial number in output stream:  56
> >
> > I got similar results when I tried ssh'ing to the cluster from my Mac
> > using Xquartz.
> >
> > Afterwards I found a lot of reports online about this being very
> > difficult to get to work due to things like OpenGL expecting shared
> > memory buffers.
> >
> > I'm wondering if anyone on the list has managed to get remote OpenGl
> > working. If so, please recommend any settings and/or apps I should
> > look into.
> >
> > Thanks!
> >
> > Walt
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