id summary reporter owner description type status component version resolution keywords cc guest host 1853 No sound on XP guest when changing focus on both FullScreen apps Stahn "I'm on XP SP3, running an XP SP3 guest machine, the guest (VirtualBox) is on a second monitor. I installed the Guest Additions, load up a Video file (.avi) on Shared Folders, put on FullScreen (Host Key+F). All Ok. Then I load up a Fullscreen application (like a game) on the host (first monitor), and then the sound on the guest (second monitor) is muted. If I click again on the guest, the sound is on. Got no problems with VMware Workstation. In the VM settings, Audio is enabled, Host Audio Driver is on Windows Direct Sound, and Audio Controller is ICH AC97. Tested with SB16, no luck. " defect closed audio VirtualBox 1.6.2 duplicate fullscreen Windows Windows