Re: running openGL application remotely using ssh -X and cygwin/x ,extension "NV-GLX" missing on display "localhost:10.0

["Biris, Octavian" <octavian_biris@brown.edu>]

I know for a fact that when I ssh from my Ubuntu partition to the
remote machine the application works without crashing. However, when I
use windows 8 and Cygwin X the crash occurs for the same application.
I will install the debugging tools and report my findings to you.

Thanks for looking into this!
-Octavian

On Sat, Apr 26, 2014 at 7:52 AM, Jon TURNEY <jon.turney@dronecode.org.uk> wrote:
> On 24/04/2014 23:45, Biris, Octavian wrote:
>>
>> I am attempting to  run an opengl application remptely to a ubuntu
>> linux machine from my windows 8 machine.
>> To do so  I start the cygwin console, call startxwin.
>> Running glxinfo | grep OpenGL returns the vendor of my graphics card,
>> NVIDIA.
>>
>> glxinfo |grep OpenGL
>> OpenGL vendor string: NVIDIA Corporation
>> OpenGL renderer string: GeForce GTX 580/PCIe/SSE2
>> OpenGL version string: 1.4 (4.4.0)
>> OpenGL extensions:
>> Then I ssh on the ubuntu machine using -X -C as the parameters.
>> When attempting to start the application the console reads
>> extension "NV-GLX" missing on display "localhost:10.0".
>> Afterwards, the cygwin/X server crashes and I have to restart it.I
>> attached the log from
>> /var/log/Xwin/XWin.0.log
>
>
> Thanks for the bug report.
>
> I'm afraid that the log doesn't contain enough information for me to
> identify the cause of the crash.
>
> Can you install the xorg-server-debuginfo package and try again?
>
> I also have been working on a tool to automate sending better crash
> information using minidumps.  If you would like to try that, download it
> from [1] (anonymous ftp) and put it into /usr/bin and reproduce your crash
> again.
>
> [1] ftp://cygwin.com/pub/cygwinx/x86_64/xorg_cygwin_crash_reporter_gui.exe
>
>
>> Does cygwin/x support running OpenGL applications remotely? Am I
>> missing something? Do I have to install the mesa-utils libraries on
>> the remote machine?
>
>
> Yes, this should work.
>
> I'm not entirely clear if the 'extension "NV-GLX" missing' message is a
> warning or an error, but according to the internet it seems to be due to
> having a Nvidia libGL installed on the remote machine, so if all else fails
> you might look at uninstalling the Nvidia proprietary driver and libGL, and
> using mesa instead.
>
> --
> Jon TURNEY
> Volunteer Cygwin/X X Server maintainer
>

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