I still have the problem with Mesa 7.5/git from June, 26th. Running with MESA_DEBUG=1, I can get this error just before the segfault: Mesa: User error: GL_INVALID_OPERATION in glMapBufferARB(already mapped)
I works in software mode, without giving OpenGL errors. Sarvatt, who is packaging the mesa libs for xorg-edgers, has reproduced it too with mesa 7.6/git. Also, I could get it running on another box running Ubuntu Intrepid with nvidia 177.82. Cordialy, David HENRY Le mercredi 24 juin 2009 à 15:57 -0700, Ian Romanick a écrit : > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > HENRY David wrote: > > Hello, > > > > I'm using xorg-edgers' packages on Ubuntu Jaunty, so I have equivalent > > of mesa 7.5 from git (intel 945GM), up to date. > > You might try building from source. Some changes were recently (last > week?) made to the mesa_7_5_branch that change the way VBOs are > allocated on that platform. > > > Recently (but unfortunately I can't tell exactly when), some of my own > > OpenGL programs using VBOs and glMapBuffer broke. I'm not sure if it's a > > bug of the intel DRI driver or a misuse of glMapBuffer, so I first ask > > on the list before possibly filling a bug report. > > > > I'm attaching a little OpenGL program showing the problem. It displays a > > rotating cube. When using glMapBuffer/memcpy/glUnmapBuffer, it works for > > the first frame and crashes for the next one. If I use glBufferData it > > works fine. > > Try two things: > > 1. Verify that sizeof(cube) == (24 * sizeof(struct VN_t)). > 2. Change the GL_WRITE_ONLY_ARB to GL_READ_WRITE_ARB. > > > Is it expected, or is it a bug? > > It's certainly a bug. The only question is in whose code. :) > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.9 (GNU/Linux) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org > > iEYEARECAAYFAkpCr2MACgkQX1gOwKyEAw+uTACdHyTQj7MaUBck7+bEEa2lLpya > 1XYAn0bFAEUHo5ND3Vj9xoco2C37jeTp > =J85c > -----END PGP SIGNATURE----- ------------------------------------------------------------------------------ -- _______________________________________________ Dri-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/dri-devel
