I tried the solution knarf posted here is the command i type. LD_LIBRARY_PATH=/opt/LIBx11-noxcb/lib:$LD_LIBRARY_PATH vmware I still get this LD_LIBRARY_PATH=/opt/LIBx11-noxcb/lib:$LD_LIBRARY_PATH vmware Locking assertion failure. Backtrace: #0 /usr/lib32/libxcb-xlib.so.0 [0xf6f73767] #1 /usr/lib32/libxcb-xlib.so.0(xcb_xlib_unlock+0x31) [0xf6f738b1] #2 /usr/lib32/libX11.so.6(_XReply+0xfd) [0xf7e001bd] #3 /usr/lib/vmware/lib/libXrender.so.1/libXrender.so.1(XRenderQueryFormats+0x109) [0xf7ce2969] #4 /usr/lib/vmware/lib/libXrender.so.1/libXrender.so.1(XRenderFindFormat+0x4c) [0xf7ce2f4c] #5 /usr/lib/vmware/lib/libgdk-x11-2.0.so.0/libgdk-x11-2.0.so.0 [0xf7b28180] #6 /usr/lib/vmware/lib/libgdk-x11-2.0.so.0/libgdk-x11-2.0.so.0 [0xf7b28d2c] #7 /usr/lib/vmware/lib/libgdk-x11-2.0.so.0/libgdk-x11-2.0.so.0(gdk_draw_pixbuf+0x270) [0xf7af8c14] #8 /usr/lib/vmware/lib/libgdk-x11-2.0.so.0/libgdk-x11-2.0.so.0 [0xf7b0524f] #9 /usr/lib/vmware/lib/libgdk-x11-2.0.so.0/libgdk-x11-2.0.so.0(gdk_draw_pixbuf+0x270) [0xf7af8c14] #10 /usr/lib/vmware/lib/libgdk-x11-2.0.so.0/libgdk-x11-2.0.so.0(gdk_pixbuf_render_pixmap_and_mask_for_colormap+0x255) [0xf7b04b34] #11 /usr/lib/vmware/lib/libgtk-x11-2.0.so.0/libgtk-x11-2.0.so.0 [0xf7a09298] #12 /usr/lib/vmware/lib/libgtk-x11-2.0.so.0/libgtk-x11-2.0.so.0 [0xf7a09586] #13 /usr/lib/vmware/lib/libgtk-x11-2.0.so.0/libgtk-x11-2.0.so.0 [0xf7a0b77e] #14 /usr/lib/vmware/lib/libgobject-2.0.so.0/libgobject-2.0.so.0(g_cclosure_marshal_VOID__VOID+0xd1) [0xf7c1e459] #15 /usr/lib/vmware/lib/libgobject-2.0.so.0/libgobject-2.0.so.0 [0xf7c063a1] #16 /usr/lib/vmware/lib/libgobject-2.0.so.0/libgobject-2.0.so.0(g_closure_invoke+0x1b1) [0xf7c06076] #17 /usr/lib/vmware/lib/libgobject-2.0.so.0/libgobject-2.0.so.0 [0xf7c1d6eb] #18 /usr/lib/vmware/lib/libgobject-2.0.so.0/libgobject-2.0.so.0(g_signal_emit_valist+0x91e) [0xf7c1cd46] #19 /usr/lib/vmware/lib/libgobject-2.0.so.0/libgobject-2.0.so.0(g_signal_emit+0x38) [0xf7c1d0b8] Locking assertion failure. Backtrace: #0 /usr/lib32/libxcb-xlib.so.0 [0xf6f73767] #1 /usr/lib32/libxcb-xlib.so.0(xcb_xlib_lock+0x2e) [0xf6f7381e] #2 /usr/lib32/libX11.so.6 [0xf7dff518] #3 /usr/lib32/libX11.so.6(XAddExtension+0x2c) [0xf7de2c9c] #4 /usr/lib/vmware/lib/libXft.so.2/libXft.so.2(_XftDisplayInfoGet+0x77) [0xf7cdaed7] #5 /usr/lib/vmware/lib/libXft.so.2/libXft.so.2 [0xf7cd98b1] #6 /usr/lib/vmware/lib/libXft.so.2/libXft.so.2 [0xf7cd9d39] #7 /usr/lib/vmware/lib/libXft.so.2/libXft.so.2(XftDrawPicture+0x10) [0xf7cd9ec0] #8 /usr/lib/vmware/lib/libgdk-x11-2.0.so.0/libgdk-x11-2.0.so.0 [0xf7b269b6] #9 /usr/lib/vmware/lib/libgdk-x11-2.0.so.0/libgdk-x11-2.0.so.0 [0xf7b28d75] #10 /usr/lib/vmware/lib/libgdk-x11-2.0.so.0/libgdk-x11-2.0.so.0(gdk_draw_pixbuf+0x270) [0xf7af8c14] #11 /usr/lib/vmware/lib/libgdk-x11-2.0.so.0/libgdk-x11-2.0.so.0 [0xf7b0524f] #12 /usr/lib/vmware/lib/libgdk-x11-2.0.so.0/libgdk-x11-2.0.so.0(gdk_draw_pixbuf+0x270) [0xf7af8c14] #13 /usr/lib/vmware/lib/libgdk-x11-2.0.so.0/libgdk-x11-2.0.so.0(gdk_pixbuf_render_pixmap_and_mask_for_colormap+0x255) [0xf7b04b34] #14 /usr/lib/vmware/lib/libgtk-x11-2.0.so.0/libgtk-x11-2.0.so.0 [0xf7a09298] #15 /usr/lib/vmware/lib/libgtk-x11-2.0.so.0/libgtk-x11-2.0.so.0 [0xf7a09586] #16 /usr/lib/vmware/lib/libgtk-x11-2.0.so.0/libgtk-x11-2.0.so.0 [0xf7a0b77e] #17 /usr/lib/vmware/lib/libgobject-2.0.so.0/libgobject-2.0.so.0(g_cclosure_marshal_VOID__VOID+0xd1) [0xf7c1e459] #18 /usr/lib/vmware/lib/libgobject-2.0.so.0/libgobject-2.0.so.0 [0xf7c063a1] #19 /usr/lib/vmware/lib/libgobject-2.0.so.0/libgobject-2.0.so.0(g_closure_invoke+0x1b1) [0xf7c06076] vmware: ../../src/xcb_lock.c:77: _XGetXCBBuffer: Assertion `((int) ((xcb_req) - (dpy->request)) >= 0)' failed. How can i get vmware server to work in ubuntu hardy. Is it no longer supported ? so they just wont fix it? do they want to force me to switch to KVM or something instead of using Vmware to run vista in hardy? I just dont get it.