id summary reporter owner description type status component version resolution keywords cc guest host 8399 Unknown version of the X Window System installed. garym "Upgraded to 4.0.2 and installed guest 4.0.2, upgraded to 4.0.4 and guest 4.0.4 with the same result. Installing the Guest additions I get error: ""Warning: Unknown version of the X Window System installed."" The drivers were not installed. On reboot it did not load virtual box drivers. Xwindows failed to complete loading. I guess the installer didn't lie. Is there a work around to this issue ? {{{ From the Xorg log file: (II) Loading extension SolarisIA (II) LoadModule: ""xtsol"" (WW) Warning, couldn't open module xtsol (II) UnloadModule: ""xtsol"" (EE) Failed to load module ""xtsol"" (module does not exist, 0) (II) LoadModule: ""vboxvideo"" (WW) Warning, couldn't open module vboxvideo (II) UnloadModule: ""vboxvideo"" (EE) Failed to load module ""vboxvideo"" (module does not exist, 0) (II) LoadModule: ""vesa"" (II) Loading /usr/lib/xorg/modules/drivers/amd64/vesa_drv.so (II) Module vesa: vendor=""X.Org Foundation"" compiled for 1.7.4, module version = 2.2.1 Module class: X.Org Video Driver ABI class: X.Org Video Driver, version 6.0 (II) LoadModule: ""fbdev"" (WW) Warning, couldn't open module fbdev (II) UnloadModule: ""fbdev"" (EE) Failed to load module ""fbdev"" (module does not exist, 0) (II) VESA: driver for VESA chipsets: vesa (II) Primary Device is: PCI 00@00:02:0 Xwindows info: X.Org X Server 1.7.4 Release Date: 2010-01-08 X Protocol Version 11, Revision 0 Build Operating System: SunOS 5.11 i86pc Current Operating System: SunOS opensolariscloud 5.11 snv_134b i86pc Build Date: 22 May 2010 10:19:23AM Solaris ABI: 64-bit }}}" defect closed guest additions VirtualBox 4.0.4 invalid guest xwindows garym Solaris Solaris