Problem with OpenGL on new X serverl

["Florent Fievez" <florent dot fievez at fievel dot be>]

Your patch doesn't fix the SEGV.
I know this is off-topic but can you tell me if there is a simple way
to compile in debug mode using cygport ?

2008/11/21  <user@domain.invalid>:
> Florent Fievez wrote:
>>
>> Debugger is not very useful because the binaries are stripped. Is
>> there a debug version somewhere or should i recompile it myself to
>> have it ?
>
> Hi Florent,
>
> Thanks for the bug report.
>
> Ignore the "GetWindowProp - pWin or name was NULL", this is just log spam
> and a red herring.
>
> As you have surmised, the problem is GLX related.  There are some reports of
> remote GLX clients working (Ubuntu 8.10), so perhaps it is related to the
> client being built for an older version of the GLX extension...
>
> If you are able to rebuild the X server yourself, could you confirm that the
> attached patch fixes the crash (GL is still broken, though, it looks like
> the something isn't initialized correctly...)
>
> Rebuilding the source *should* be as simple as:
>
> 1) Run cygwin setup, select cygport,the xorg-server source package, and the
> packages for the build-time dependencies and devel packages corresponding to
> run-time dependencies listed in /usr/share/doc/Cygwin/usr/share/doc/Cygwin
> 2) cd /usr/src/
> 3) cygport xorg-server-1.5.3-3.cygport prep compile
>
> I have made a start at updating
> http://x.cygwin.com/docs/cg/cygwin-x-cg.html,  so you may find that helpful,
> but it still needs more work so don't take it as gospel.
>
>> 2008/11/21 Florent Fievez <florent.fievez@fievel.be>:
>>>
>>> After a grep in the sources, I see the error is from file
>>> cygwin-net_wm_icon-support.patch. But i'm not sure that the error is
>>> in relation with the crash. I will try to run the program under a
>>> debugger.
>>>
>>> 2008/11/21 Florent Fievez <florent.fievez@fievel.be>:
>>>>
>>>> Hello,
>>>>
>>>> I have a crash when opening OpenGL. I have the same configuration than
>>>> you :
>>>> ssh -X <host> ; XWin with glx extension activated.
>>>>
>>>> Some of my investigations :
>>>>
>>>> 1. It's not caused by the X client OS (SunOS and Linux give the same
>>>> crash)
>>>> 2. It's not a problem with our application, glxinfo produce the same
>>>> problem
>>>> 3. It seems that the message "GetWindowProp - pWin or name was NULL"
>>>> is displayed before the crash, see my log in attachement.
>>>>
>>>> I will download and check the XWin sources but I have not a lot of
>>>> time for debugging it so if someone have the same problem or want to
>>>> help me ...
>>>>
>>>> Best regards,
>>>>
>>>>
>>>>
>>>> 2008/11/20 Yaakov (Cygwin Ports) <yselkowitz@users.sourceforge.net>:
>>>>>
>>>>> -----BEGIN PGP SIGNED MESSAGE-----
>>>>> Hash: SHA256
>>>>>
>>>>> Florent Fievez wrote:
>>>>>>
>>>>>> I have a problem running new X server 1.5.3 with openGL. Since this
>>>>>> update, X crash when launching an OpenGL client from SunOS server.
>>>>>> Since the application we are developing use OpenGL, it's a big problem
>>>>>> for me (I have to use an exceed commercial xserver for testing our
>>>>>> application).
>>>>>>
>>>>>> So is there a known solution, patch or other to this issue ?
>>>>>
>>>>> I see that you do have the libGL1 package installed.  Could you please
>>>>> review my results with GLX:
>>>>>
>>>>> http://cygwin.com/ml/cygwin-xfree/2008-11/msg00100.html
>>>>> http://cygwin.com/ml/cygwin-xfree/2008-11/msg00160.html
>>>>>
>>>>> If you are still having issues, please attach your /var/log/XWin.log as
>>>>> well.
>
>
>
> Cygwin/X: GLX crash workaround
>
> Paper over the cracks. Avoid a crash when we have a broken context.
>
> Appears to be related to remote clients built for earlier GLX versions
>
> ---
>  xserver/glx/single2.c |    1 +
>  1 file changed, 1 insertion(+)
>
> Index: xorg-server-1.5.3/xserver/glx/single2.c
> ===================================================================
> --- xorg-server-1.5.3.orig/xserver/glx/single2.c
> +++ xorg-server-1.5.3/xserver/glx/single2.c
> @@ -357,6 +357,7 @@ int DoGetString(__GLXclientState *cl, GL
>        string = buf;
>     }
>     else if ( name == GL_VERSION ) {
> +        if (string == NULL) { string = "unknown"; }
>        if ( atof( string ) > atof( GLServerVersion ) ) {
>            buf = xalloc( strlen( string ) + strlen( GLServerVersion ) + 4 );
>            if ( buf == NULL ) {
>
>
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--
Florent Fievez
florent.fievez@fievel.be



-- 
Florent Fievez
florent.fievez@fievel.be

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