Might be an oldie for the nerds here but it took me a while to figure this out, thought I'd share the solution.
If objects or the screen are/is flickering in games running in Wine, edit /etc/default/grub and do
and add "nomodeset" the the kernel options, like this:sudo gedit /etc/default/grub
Then doGRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset"
and reboot.sudo update-grub