I just witnessed an odd behaviour. When I unplug the power-cable from my i915-based laptop and the CPU-throttling kicks in (going from 2 GHz to about 800 MHz). Once that happened all the sluggish drawing performace of OpenGL- and cairo-based programs gets smooth as silk again. I'm running a up-to-date Feisty without downgraded libx11. I've currently no idea what's going on and causing this behaviour, but this might be a hint for more xorg/kernel savvy people here to solve the issue.
-- Sluggish rendering since xorg 7.2 update https://launchpad.net/bugs/88815 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
