Modifying device section of xorg.conf like this makes the freeze to disappear
Section "Device" Identifier "NVIDIA Corporation NV34 [GeForce FX 5200]" Driver "nvidia" BusID "PCI:1:0:0" Option "NvAGP" "0" Option "RenderAccel" "Off" Option "IgnoreDisplayDevices" "DFP,TV" Option "NoRenderExtension" "Off" Option "AllowGLXWithComposite" "Off" EndSection -- Dapper-64 bit UI Freeze, need hard reboot to get out https://launchpad.net/bugs/51089 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs