I am using the GNOME Shell interface on Ubuntu 11.10. The black titlebar with Activities, Calender, and the notification icons has disappeared. The Nautilus menu (File, Edit, View, ect.) is at the top instead. If I open any applications, they are missing their titlebar and the buttons, and appear in the top left of the screen. Does anyone know how to fix this? I am using a VGA graphics card, with no driver.

The output of lspci | grep VEGA is:

00:02.0 VGA compatible controller: Intel Corporation 82915G/GV/910GL Integrated Graphics Controller (rev 04)

The output of /usr/lib/nux/unity_support_test -p is:

OpenGL vendor string:   Tungsten Graphics, Inc

OpenGL renderer string: Mesa DRI Intel(R) 915G x86/MMX/SSE2

OpenGL version string:  1.4 Mesa 7.11

Not software rendered:    yes

Not blacklisted:          yes

GLX fbconfig:             yes

GLX texture from pixmap:  yes

GL npot or rect textures: yes

GL vertex program:        yes

GL fragment program:      yes

GL vertex buffer object:  yes

GL framebuffer object:    yes

GL version is 1.4+:       yes    

Unity 3D supported:       yes