Date: Thu, 22 Sep 2016 05:17:41 +0200 From: Polytropon <freebsd@edvax.de> To: Andrea Venturoli <ml@netfence.it> Cc: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> Subject: Re: OpenGL over X11/SSH Message-ID: <20160922051741.5092ccae.freebsd@edvax.de> In-Reply-To: <2deff892-7ac3-e3e2-92fe-27e95f089ea0@netfence.it> References: <2deff892-7ac3-e3e2-92fe-27e95f089ea0@netfence.it>
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On Wed, 21 Sep 2016 17:50:53 +0200, Andrea Venturoli wrote: > I'm used to connecting via ssh to a couple of "heavy duty" servers on my > LAN; I've got X11 forward working and in fact I usually run emacs, > xterm, sometimes even FireFox. > > Now I need to try an OpenGL-based program, but I'm not able to get it right. > > > > > % glxinfo > > name of display: localhost:11.0 > > libGL error: failed to open drm device: No such file or directory > > libGL error: failed to load driver: r600 > > libGL error: unable to load driver: swrast_dri.so > > libGL error: failed to load driver: swrast > > X Error of failed request: GLXBadContext > > Major opcode of failed request: 154 (GLX) > > Minor opcode of failed request: 6 (X_GLXIsDirect) > > Serial number of failed request: 46 > > Current serial number in output stream: 45 > > > > AFAICT this should work, albeit without hardware acceleration, which is > fine to me since this is only going to be a test. If I understand the messages correctly, the OpenGL output requires direct rendering (DRM) instead of a software renderer. The DRM/DRI task is being performed directly on the hardware the program is running on and maybe cannot be redirected to a remote X system. The somehow direct access to the hardware maybe cannot be tunneled over X11/SSH. The messages indicate that the DRM device cannot be found and the r600 (Radeon?) driver cannot be loaded. This is a quire early error of libGL. On the other hand, if you use software rendering, it _should_ work. -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...
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