As far as I know, there is no fix for the lag while tabbed out. I had problems for years until I installed dgvoodoo and borderless gaming. Also took the Sony folder out of program files and put it just in the drive folder with winxp2 service pack applied. Have not had a crash in nearly a year. I am not sure how well wineq2 works with dgvoodoo, you can try it but if you have bad luck just search for boderless gaming. 
		
		
		
		
		
		
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