Re: [GtkGLExt] Is it a bug of gtkglext?

[明覺 <shi minjue gmail com>]

On Fri, May 15, 2009 at 10:17 PM, Braden McDaniel <braden endoframe com> wrote:
> On Fri, 2009-05-15 at 18:38 +0800, 明覺 wrote:
>> On Fri, May 15, 2009 at 2:35 PM, Braden McDaniel <braden endoframe com> wrote:
>> > On Fri, 2009-05-15 at 11:58 +0800, 明覺 wrote:
>> >> On Wed, May 13, 2009 at 11:14 PM, Braden McDaniel <braden endoframe com> wrote:
>> >> > On Wed, 2009-05-13 at 15:09 +0800, 明覺 wrote:
>> >> >> I compiled  the example gtkglextmm program gears.cc(attached)
>> >> >
>> >> > There's no reason to attach source code that is part of the GtkGLExt
>> >> > distribtion to mailing list messages.  We know where to find it. :-)
>> >> >
>> >> >>  to
>> >> >> a.out, it can start and display successfully, but if i resize the
>> >> >> window, a segmentation fault error will occur, here is the error info
>> >> >> from valgrind. any advice to solve it? thanks
>> >> >
>> >> > The actual failure is happening inside of Mesa (presumably) code.
>> >> > glXWaitX isn't reasonably close to line 659 in trunk Mesa; so you'll
>> >> > need to track this down in the source to whatever version you're using.
>> >> >
>> >> > You should probably try turning up the verbosity in valgrind to see if
>> >> > it will tell you *what* value was uninitialized; though looking at the
>> >> > right line 659 might make that apparent.
>> >>
>> >> thank you for the information, here is the ouput of valgrind, how
>> >> could i solve it? and someone said that it's caused by video driver
>> >> error, is that possible?
>> >
>> > As I suggest above, inspect the source for whatever version of Mesa
>> > you're using.  Find the variable that valgrind is claiming is
>> > uninitialized.
>>
>> I'm using the mesa from its git, that the latest code,(I also used
>> 7.4, 7.5 and 7.6 of mesa, all the similar error), the variable not
>> uninitialized should be psc->driScreen->waitX
>> in line 659 of glxcmds.c          if (psc->driScreen->waitX != NULL)
>> any advice? thanks
>
> That sounds like it's almost certainly the bug that Jean pointed out.  I
> suggest applying the patch attached to that bug report.

thank you, I have add a command to that bug, and now I solved my
problem by installing the non-free video driver from Nivida company,
which contains its own opengl library implementation. :(

>
> --
> Braden McDaniel <braden endoframe com>
>
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>



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Gtkmm/Gtkglextmm Scim Totem Pidgin.