[Xquartz-dev] 2.3.3_rc1

Jack Howarth howarth at bromo.med.uc.edu
Mon Mar 9 20:50:42 PDT 2009


The author of vmd-xplor added...

        if [ `/usr/bin/uname -m` = "i386" ]; then
                # I get too many complaints when these are not set.
                #
                VMDSIMPLEGRAPHICS=1
                LIBGL_ALWAYS_INDIRECT=1
                export VMDSIMPLEGRAPHICS LIBGL_ALWAYS_INDIRECT
        fi

to the vmd-xplor startup script. I guess the alternative is to
take a look at those cases where vmd-xplor has issues (like
on a HD2600 with 2.3.3-rc1) and fix them in libGL.
              Jack

On Mon, Mar 09, 2009 at 08:39:24PM -0700, Jeremy Huddleston wrote:
> We don't intend to support indirect rendering with the new libGL in the 
> short term.  It's really too slow and only useful when the X client is on 
> a remote system (which is rarely the case for OSX apps).  Are you running 
> vmd-xplor on a remote system for some reason?  If that were the case, 
> then I'd expect glxinfo to actually bail with an AppleDRI error.
>
> --Jeremy
>
> On Mar 9, 2009, at 17:13, Jack Howarth wrote:
>
>> George,
>>   I believe I have figured out the origin of the problems
>> with vmd-xplor on 2.3.3-rc1. The problem is that the new
>> GLX/DRI code doesn't honor LIBGL_ALWAYS_INDIRECT when it
>> is set. Under X11 2.3.2.1, I get...
>>
>> [Macintosh-2:~] howarth% setenv LIBGL_ALWAYS_INDIRECT 1
>> [Macintosh-2:~] howarth% glxinfo | grep direct
>> direct rendering: No (LIBGL_ALWAYS_INDIRECT set)
>>
>> whereas under 2.3.3-rc1, I get...
>>
>> [Macintosh-2:~] howarth% setenv LIBGL_ALWAYS_INDIRECT 1
>> [Macintosh-2:~] howarth% glxinfo | grep direct
>> Xlib:  extension "Generic Event Extension" missing on display "/tmp/ 
>> launch-W4Xpc5/:0".
>> Xlib:  extension "Generic Event Extension" missing on display "/tmp/ 
>> launch-W4Xpc5/:0".
>> direct rendering: Yes
>>
>> If you can fix this in the GLX, I can test it to see if this
>> eliminates the issues with vmd-xplor on the HD2600.
>>                 Jack
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>
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