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When I start virtual box in another x session under tty8, I get some strange results. Everything appears to be normal but when I boot up my Windows 7 Home Premium 64 bit system aero does not work. However if I load this same virtual machine in the regular session that is started when logging in nothing is wrong and aero works fine. The command I use is "xinit virtualbox -- :1" Anyone have any idea what is going on?

Thank you in advance.

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I don't know for sure, but I suspect it has to do with hardware acceleration passed through to the VM. –  hbdgaf Mar 2 '13 at 13:10
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It may also be (just my humble guess here) that your graphics driver has issues with multiple X sessions. –  Takkat Mar 2 '13 at 14:05
    
I use the regular open souce radeon drivers that come with the install. I never try to set up the closed source flgrx ones, they never worked. My graphics card is ATI Radeon HD 4200 built in my laptop. –  Raansu Mar 2 '13 at 15:47
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