http://bugs.winehq.org/show_bug.cgi?id=55586
--- Comment #3 from Liviu Ionescu ilg@livius.net ---
WINEDEBUG=-all
Thank you, this is indeed an useful workaround.
The only drawback I see is that it suppresses **all** messages, not only those related to the missing graphical drivers, including possible legit messages, which, in certain cases, might be a problem.