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Accelerated videodriver suddenly broken

Posted: 23. May 2015, 00:30
by Romero1972
Win 7, x64 host
XP guest

The guest machine configured with 3D accelerated adapter has suddenly started to revert to VGA mode after startup. In the safe mode the normal hicolor SVGA mode is used.
Reinstallation of additions on the guest and VB on the host hasn't solved the issue.