id summary reporter owner description type status component version resolution keywords cc guest host 5697 Screen resolutions above 1600x1200 cause X in guest to crash in CentOS 5.3 amd64 Mike "Setting any video mode with a width of 1920 (1920x1200 or 1920x1080) causes X in the guest OS to crash. I am unable to retrieve the Xorg.0.log file from the machine but I can see what appears to be a kernel crash on the console. Host and guest are both CentOS 5.3 amd64. I can see part of the stack trace from the crash. It appears to go: {{{ /usr/lib64/xorg/modules/libramdac.so /usr/lib64/xorg/modules/libvbe.so /usr/lib64/xorg/modules/libvbe.so /usr/lib64/xorg/modules/libvbe.so /usr/lib64/xorg/modules/libfb.so /usr/lib64/xorg/modules/libfb.so /usr/lib64/xorg/modules/libfb.so /usr/lib64/xorg/modules/libshadowfb.so /usr/lib64/xorg/modules/libshadowfb.so /usr/lib64/xorg/modules/libshadowfb.so [stack] [vdso] }}} I'm sure there's more but it scrolls off the screen and I can't retrieve it. Here is the xorg.conf I'm trying to use: {{{ # VirtualBox generated configuration file # based on /etc/X11/xorg.conf. # Xorg configuration created by system-config-display Section ""InputDevice"" Identifier ""Keyboard[0]"" Driver ""kbd"" Option ""XkbModel"" ""pc105"" Option ""XkbLayout"" ""us"" Option ""Protocol"" ""Standard"" Option ""CoreKeyboard"" EndSection Section ""InputDevice"" Identifier ""Mouse[1]"" Driver ""vboxmouse"" Option ""Buttons"" ""9"" Option ""Device"" ""/dev/input/mice"" Option ""Name"" ""VirtualBox Mouse"" Option ""Protocol"" ""explorerps/2"" Option ""Vendor"" ""Sun Microsystems Inc"" Option ""ZAxisMapping"" ""4 5"" Option ""CorePointer"" EndSection Section ""ServerLayout"" Identifier ""Layout[all]"" InputDevice ""Mouse[1]"" ""CorePointer"" Option ""Clone"" ""off"" Option ""Xinerama"" ""off"" Screen ""Screen[0]"" EndSection Section ""Monitor"" Identifier ""Monitor[0]"" ModelName ""VirtualBox Virtual Output"" VendorName ""Sun Microsystems Inc"" EndSection Section ""Device"" BoardName ""VirtualBox Graphics"" Driver ""vboxvideo"" Identifier ""Device[0]"" VendorName ""Sun Microsystems Inc"" EndSection Section ""Screen"" SubSection ""Display"" Depth 24 Modes ""1920x1200"" EndSubSection Device ""Device[0]"" Identifier ""Screen[0]"" Monitor ""Monitor[0]"" EndSection }}} " defect closed other VirtualBox 3.1.0 fixed Linux Linux