Bug#528708: Not completely fixed upstream in 7.4.2
On Wed, 2009-05-20 at 11:00 -0700, Daniel Schepler wrote: On Wednesday 20 May 2009 01:15:51 Michel Dänzer wrote: On Tue, 2009-05-19 at 17:01 -0700, Daniel Schepler wrote: But with the application I'm developing I still get the condition where glGetString(GL_VERSION) returns NULL in my override of QGLWidget::initializeGL. Is a GLX context current when you call glGetString? Yes, as I said in the original post, QGLWidget::initializeGL is called with its GL context already made current. And just to verify that, I tried adding an explicit call to QGLWidget::makeCurrent at the start of my override, which didn't help. Then, I added some debugging code to switch to another (shared) context and back, printing the return value of glXGetCurrentContext after each switch and before the first one. That inexplicably made the glGetString call start working, although the context values looked like they were doing the right thing. And with the original code, running the program with MESA_DEBUG=1 makes the library complain about calling glGetString with no active context, even when a debugging glXGetCurrentContext shows the correct (nonzero) value. Weird. Please report this upstream at http://bugs.freedesktop.org , product Mesa, component Mesa core. Preferably with a small test program which exhibits the problem. -- Earthling Michel Dänzer |http://www.vmware.com Libre software enthusiast | Debian, X and DRI developer -- To UNSUBSCRIBE, email to debian-x-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org
Bug#528708: Not completely fixed upstream in 7.4.2
On Tue, 2009-05-19 at 17:01 -0700, Daniel Schepler wrote: I just tried compiling and installing Mesa 7.4.2 (copied the debian/ directory from 7.4.1-1 into an unpacked copy of 7.4.2, and added a 7.4.2-0 version to debian/changelog). It does fix the crashes with the Qt OpenGL examples -- although with the textures example and a couple others, when I exit I get Mesa 7.4.2 implementation error: invalid reference to a deleted texture object Please report at bugzilla.freedesktop.org textures: main/texobj.c:305: _mesa_reference_texobj: Assertion `valid_texture_object(oldTex)' failed. Aborted This should be fixed in upstream Git mesa_7_4_branch. But with the application I'm developing I still get the condition where glGetString(GL_VERSION) returns NULL in my override of QGLWidget::initializeGL. Is a GLX context current when you call glGetString? -- Earthling Michel Dänzer |http://www.vmware.com Libre software enthusiast | Debian, X and DRI developer -- To UNSUBSCRIBE, email to debian-x-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org
Bug#528708: Not completely fixed upstream in 7.4.2
On Wednesday 20 May 2009 01:15:51 Michel Dänzer wrote: On Tue, 2009-05-19 at 17:01 -0700, Daniel Schepler wrote: But with the application I'm developing I still get the condition where glGetString(GL_VERSION) returns NULL in my override of QGLWidget::initializeGL. Is a GLX context current when you call glGetString? Yes, as I said in the original post, QGLWidget::initializeGL is called with its GL context already made current. And just to verify that, I tried adding an explicit call to QGLWidget::makeCurrent at the start of my override, which didn't help. Then, I added some debugging code to switch to another (shared) context and back, printing the return value of glXGetCurrentContext after each switch and before the first one. That inexplicably made the glGetString call start working, although the context values looked like they were doing the right thing. And with the original code, running the program with MESA_DEBUG=1 makes the library complain about calling glGetString with no active context, even when a debugging glXGetCurrentContext shows the correct (nonzero) value. -- Daniel Schepler -- To UNSUBSCRIBE, email to debian-x-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org
Bug#528708: Not completely fixed upstream in 7.4.2
I just tried compiling and installing Mesa 7.4.2 (copied the debian/ directory from 7.4.1-1 into an unpacked copy of 7.4.2, and added a 7.4.2-0 version to debian/changelog). It does fix the crashes with the Qt OpenGL examples -- although with the textures example and a couple others, when I exit I get Mesa 7.4.2 implementation error: invalid reference to a deleted texture object Please report at bugzilla.freedesktop.org textures: main/texobj.c:305: _mesa_reference_texobj: Assertion `valid_texture_object(oldTex)' failed. Aborted But with the application I'm developing I still get the condition where glGetString(GL_VERSION) returns NULL in my override of QGLWidget::initializeGL. I haven't been able to reproduce that condition with any small programs trying to replicate the basic setup of the application, and wondered if anybody else might have any idea how I could try to see what's going on. -- Daniel Schepler -- To UNSUBSCRIBE, email to debian-x-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org
