/var/log/apt/history.log:

Start-Date: 2014-12-18  10:41:47
Remove: nvidia-opencl-icd-331-updates:amd64 (331.113-0ubuntu0.1), nvidia-settings:amd64 (331.20-0ubuntu8), nvidia-common:amd64 (0.2.98.4), nvidia-libopencl1-331-updates:amd64 (331.113-0ubuntu0.1), nvidia-331-updates-uvm:amd64 (331.113-0ubuntu0.1), libcuda1-331-updates:amd64 (331.113-0ubuntu0.1), bbswitch-dkms:amd64 (0.7-2ubuntu1), nvidia-prime:amd64 (0.6.7), nvidia-331-updates:amd64 (331.113-0ubuntu0.1)
End-Date: 2014-12-18  10:42:47


/var/log/apt/term.log:

Log started: 2014-12-18  10:41:47
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(Reading database ... 207530 files and directories currently installed.)
Removing nvidia-prime (0.6.7) ...
Removing bbswitch-dkms (0.7-2ubuntu1) ...

-------- Uninstall Beginning --------
Module:  bbswitch
Version: 0.7
Kernel:  3.16.0-28-generic (x86_64)
-------------------------------------

Status: Before uninstall, this module version was ACTIVE on this kernel.

bbswitch.ko:
 - Uninstallation
   - Deleting from: /lib/modules/3.16.0-28-generic/updates/dkms/
 - Original module
   - No original module was found for this module on this kernel.
   - Use the dkms install command to reinstall any previous module version.

depmod..........

DKMS: uninstall completed.

------------------------------
Deleting module version: 0.7
completely from the DKMS tree.
------------------------------
Done.
Removing libcuda1-331-updates (331.113-0ubuntu0.1) ...
Removing nvidia-opencl-icd-331-updates (331.113-0ubuntu0.1) ...
Removing nvidia-libopencl1-331-updates (331.113-0ubuntu0.1) ...
Removing nvidia-331-updates-uvm (331.113-0ubuntu0.1) ...
Removing all DKMS Modules
Done.
Removing nvidia-331-updates (331.113-0ubuntu0.1) ...
Removing all DKMS Modules
Done.
INFO:Disable nvidia-331-updates
DEBUG:Parsing /usr/share/ubuntu-drivers-common/quirks/put_your_quirks_here
DEBUG:Parsing /usr/share/ubuntu-drivers-common/quirks/dell_latitude
DEBUG:Parsing /usr/share/ubuntu-drivers-common/quirks/lenovo_thinkpad
stop: Unknown job: nvidia-persistenced
update-initramfs: deferring update (trigger activated)
Removing nvidia-common (1:0.2.98.4) ...
Removing nvidia-settings (331.20-0ubuntu8) ...
Processing triggers for libc-bin (2.19-10ubuntu2.1) ...
Processing triggers for man-db (2.7.0.2-2) ...
Processing triggers for initramfs-tools (0.103ubuntu8) ...
update-initramfs: Generating /boot/initrd.img-3.16.0-28-generic
Processing triggers for desktop-file-utils (0.22-1ubuntu2) ...
Processing triggers for mime-support (3.55ubuntu1) ...
Log ended: 2014-12-18  10:42:47