111 existing setting has an additional valid bit-field value in this 112 release. Valid bit-fields in this release are: 113 - 0x1 Enable the multi-threaded command stream feature. 114 - 0x2 Enable serialization between multiple command streams in the 115 same application. This feature is primarily useful for 116 applications using multiple Direct3D instances from 117 different threads, in combination with OpenGL drivers that 118 do not properly support multi-threaded access themselves. As 119 of this release, this is known to affect Microsoft Office 120 2013 and later versions in combination with the Mesa-based