https://bugs.winehq.org/show_bug.cgi?id=39465
--- Comment #3 from Sebastian Lackner sebastian@fds-team.de --- Could you please retest after commit http://source.winehq.org/git/wine.git/commit/89f12fc1016ef3a0fcf98dfcbe7c411..., I would expect that the main issue is fixed.
One thing I've noticed though, at least with example code like the one at https://www-user.tu-chemnitz.de/~ygu/petzold/ch20c.htm, is that the refresh rate can now easily be influenced by user input events.