One factor that I've neglected to mention thusfar is that I've been using my own mesa build in the above tests,
$ glxinfo ... OpenGL version string: 2.1 Mesa 9.2.0-devel (git-5a7bdd4)
After reverting to Ubuntu's packaged mesa,
$ glxinfo ... OpenGL version string: 2.1 Mesa 9.1.4
Resume appears to work as expected.
One factor that I've neglected to mention thusfar is that I've been using my own mesa build in the above tests,
$ glxinfo
...
OpenGL version string: 2.1 Mesa 9.2.0-devel (git-5a7bdd4)
After reverting to Ubuntu's packaged mesa,
$ glxinfo
...
OpenGL version string: 2.1 Mesa 9.1.4
Resume appears to work as expected.