Comment 2 for bug 1584894

StacktraceTop:
 mir::fatal_error_abort(char const*, ...) (reason=0x7ff08c204a0d "Failed to schedule page flip") at /build/mir-wCwomh/mir-0.21.0+16.04.20160330/src/common/fatal/fatal.cpp:43
 mir::graphics::mesa::DisplayBuffer::post() (this=0x15259b0) at /build/mir-wCwomh/mir-0.21.0+16.04.20160330/src/platforms/mesa/server/kms/display_buffer.cpp:282
 mir::compositor::CompositingFunctor::operator()() (this=0x17769e0) at /build/mir-wCwomh/mir-0.21.0+16.04.20160330/src/server/compositor/multi_threaded_compositor.cpp:143
 operator() () at /usr/include/c++/5/functional:2267
 execute (this=0x7ff084805bf0) at /build/mir-wCwomh/mir-0.21.0+16.04.20160330/src/server/thread/basic_thread_pool.cpp:40