https://bugs.freedesktop.org/show_bug.cgi?id=32556
--- Comment #22 from Alex Deucher agd5f@yahoo.com 2011-01-09 00:30:46 PST --- You might also try making slight changes to the clock adjustment: adjusted_clock += 50; e.g., try 40, 45, 55, 60, 65, etc.