https://bugs.freedesktop.org/show_bug.cgi?id=27786
--- Comment #2 from Luke-Jr luke-jr+freedesktop@utopios.org 2010-04-22 06:56:17 PDT --- My uneducated guess is that radeonFlush is triggering a SIGSEGV and libSDL is trying to shutdown sanely as a result, which creates a loop since the radeonFlush is already in the shutdown procedure.