Re: GLX on XWin (was Re: X server 1.5.3-2 candidate)
Yaakov (Cygwin Ports) wrote: On Thu, Nov 13, 2008 at 07:12:42PM -0600, Yaakov (Cygwin Ports) wrote: Unfortunately I don't have a linux box to experiment with... :-( There's always http://www.virtualbox.org/ if you want to get a virtual linux system. Thanks! I setup up VirtualBox, installed Ubuntu 8.10 and set up openssh-server in the VM, and configured the VirtualBox NAT port forwarding per the user manual. I then logged in with ssh -Y two different times, once from a VT running in a XWin with GLX enabled, and then from a VT in another XWin with GLX manually disabled (-extension GLX). With XWin GLX enabled, glxinfo showed all the correct information, and glxgears worked, albeit *extremely* slowly. With XWin GLX disabled, of course neither worked, giving Xlib errors that GLX extension was not available. Other X11 programs worked in both cases, but interestingly the Ubuntu GTK+ engine was used only on the server with GLX enabled. So now I'm somewhat reassured that I did the right thing with GLX, although I certainly remain open to further discussion if anyone is having different results, or if there is insight into the speed issue. Curiouser and curiouser. ssh-ing to an Ubuntu 8.10 VM, I am able to reproduce your results: $ glxinfo | grep -E "version|vendor|rendering" direct rendering: Yes server glx vendor string: SGI server glx version string: 1.2 client glx vendor string: SGI client glx version string: 1.4 GLX version: 1.2 OpenGL vendor string: Mesa Project OpenGL version string: 2.1 Mesa 7.2 OpenGL shading language version string: 1.10 and glxgears works fine. (surely direct rendering: Yes can't be right here?) ssh-ing to an Ubuntu 8.04 VM I happen to have lying around... $ glxinfo | grep -E "version|vendor|rendering" direct rendering: No (If you want to find out why, try setting LIBGL_DEBUG=verbose) server glx vendor string: SGI server glx version string: 1.2 client glx vendor string: SGI client glx version string: 1.4 GLX version: 1.2 OpenGL vendor string: OpenGL version string: (this is with my patch from [1] applied, otherwise it the server segfaults trying to read the OpenGL version string, which is occurring because the _glapi_Dispatch points to glapi_noop_table, ie. we have no GL context!) [1] http://cygwin.com/ml/cygwin-xfree/2008-11/msg00279.html -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://x.cygwin.com/docs/ FAQ: http://x.cygwin.com/docs/faq/
Re: GLX on XWin (was Re: X server 1.5.3-2 candidate)
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Yaakov (Cygwin Ports) wrote: > glxgears worked, albeit *extremely* slowly. Using SSH data compression (with the -C flag) improved this considerably. It still runs ~10% the FPS of a local instance, but it's still responsive. > the Ubuntu GTK+ engine was used only on the server with GLX enabled. - From further experimentation I now think this has nothing to do with GLX (which didn't make sense anyway); it seems to depend on whether or nor gnome-settings-daemon is running on the local display. Does anyone else have any GLX testimonials? Yaakov Cygwin/X -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.9 (Cygwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEAREIAAYFAkkhCXIACgkQpiWmPGlmQSM5mACgpE/HgMW0qaSxnqlEt4A79q0f ZGsAoIvB5bELQPNasfk6F56mJUnG4+dO =ng4D -END PGP SIGNATURE- -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://x.cygwin.com/docs/ FAQ: http://x.cygwin.com/docs/faq/
GLX on XWin (was Re: X server 1.5.3-2 candidate)
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Christopher Faylor wrote: > On Thu, Nov 13, 2008 at 07:12:42PM -0600, Yaakov (Cygwin Ports) wrote: >> Unfortunately I don't have a linux box to experiment with... :-( > > There's always http://www.virtualbox.org/ if you want to get a virtual > linux system. Thanks! I setup up VirtualBox, installed Ubuntu 8.10 and set up openssh-server in the VM, and configured the VirtualBox NAT port forwarding per the user manual. I then logged in with ssh -Y two different times, once from a VT running in a XWin with GLX enabled, and then from a VT in another XWin with GLX manually disabled (-extension GLX). With XWin GLX enabled, glxinfo showed all the correct information, and glxgears worked, albeit *extremely* slowly. With XWin GLX disabled, of course neither worked, giving Xlib errors that GLX extension was not available. Other X11 programs worked in both cases, but interestingly the Ubuntu GTK+ engine was used only on the server with GLX enabled. So now I'm somewhat reassured that I did the right thing with GLX, although I certainly remain open to further discussion if anyone is having different results, or if there is insight into the speed issue. Yaakov Cygwin/X -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.9 (Cygwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEAREIAAYFAkkdGX0ACgkQpiWmPGlmQSOiEACcDF0m/fn9xVTrxC2E4yDB5eVD ptoAnj2QXSGzcKWHCulCDXq5W2vCfIcD =36Ni -END PGP SIGNATURE- -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://x.cygwin.com/docs/ FAQ: http://x.cygwin.com/docs/faq/
