Same thing here with nvidia-180 driver or any other nvidia driver for that matter:
[~] λ = uname -a Linux alinrus-laptop 2.6.38-020638rc3-generic #201102010912 SMP Tue Feb 1 09:14:19 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux [src] λ = sudo aptitude install nvidia-180-kernel-source nvidia-180-libvdpau nvidia-glx-180 The following NEW packages will be installed: nvidia-180-kernel-source nvidia-180-libvdpau nvidia-185-kernel-source{a} nvidia-185-libvdpau{a} nvidia-current{a} nvidia-glx-180 nvidia-glx-185{a} 0 packages upgraded, 7 newly installed, 0 to remove and 3 not upgraded. Need to get 58.5 kB/46.2 MB of archives. After unpacking 143 MB will be used. The following packages have unmet dependencies: xserver-xorg-core: Breaks: xserver-xorg-video-8 which is a virtual package. The following actions will resolve these dependencies: Remove the following packages: 1) xorg 2) xserver-xorg 3) xserver-xorg-core 4) xserver-xorg-input-all 5) xserver-xorg-input-evdev 6) xserver-xorg-input-mouse 7) xserver-xorg-input-synaptics 8) xserver-xorg-input-vmmouse 9) xserver-xorg-input-wacom 10) xserver-xorg-video-all 11) xserver-xorg-video-apm 12) xserver-xorg-video-ark 13) xserver-xorg-video-ati 14) xserver-xorg-video-chips 15) xserver-xorg-video-cirrus 16) xserver-xorg-video-fbdev 17) xserver-xorg-video-i128 18) xserver-xorg-video-intel 19) xserver-xorg-video-mach64 20) xserver-xorg-video-mga 21) xserver-xorg-video-neomagic 22) xserver-xorg-video-nouveau 23) xserver-xorg-video-openchrome 24) xserver-xorg-video-r128 25) xserver-xorg-video-radeon 26) xserver-xorg-video-rendition 27) xserver-xorg-video-s3 28) xserver-xorg-video-s3virge 29) xserver-xorg-video-savage 30) xserver-xorg-video-siliconmotion 31) xserver-xorg-video-sis 32) xserver-xorg-video-sisusb 33) xserver-xorg-video-tdfx 34) xserver-xorg-video-trident 35) xserver-xorg-video-tseng 36) xserver-xorg-video-vesa 37) xserver-xorg-video-vmware 38) xserver-xorg-video-voodoo Leave the following dependencies unresolved: 39) gdm recommends xserver-xorg 40) xinit recommends xserver-xorg | xserver ** Changed in: nvidia-graphics-drivers (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/713420 Title: nvidia-current removes xserver-xorg package during installation -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs