https://bugs.freedesktop.org/show_bug.cgi?id=38473
--- Comment #5 from Roger Leigh rleigh@debian.org 2011-06-19 11:29:04 PDT --- Alt-SysRq-V certainly restores the display to its former state (framebuffer console running at native resolution).
Should I open a bug in the kernel bugzilla for this issue, or is this something that the mesa drivers can work around? I guess once you've killed a mesa-using program it's really in the hands of the kernel to do the necessary restoring of the state.
Thanks, Roger