Comment 2 for bug 1639520

Here's the apt log of the update being applied which caused the problem

Log started: 2016-11-04 13:32:03
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(Reading database ... 358778 files and directories currently installed.)
Preparing to unpack .../libcurl3-gnutls_7.35.0-1ubuntu2.10_amd64.deb ...
Unpacking libcurl3-gnutls:amd64 (7.35.0-1ubuntu2.10) over (7.35.0-1ubuntu2.9) ...
Preparing to unpack .../curl_7.35.0-1ubuntu2.10_amd64.deb ...
Unpacking curl (7.35.0-1ubuntu2.10) over (7.35.0-1ubuntu2.9) ...
Preparing to unpack .../libcurl3_7.35.0-1ubuntu2.10_amd64.deb ...
Unpacking libcurl3:amd64 (7.35.0-1ubuntu2.10) over (7.35.0-1ubuntu2.9) ...
Preparing to unpack .../keybase_1.0.18-20161104161546.6537940_amd64.deb ...
Unpacking keybase (1.0.18-20161104161546.6537940) over (1.0.18-20161101160102.a862115) ...
Selecting previously unselected package nvidia-367.
Preparing to unpack .../nvidia-367_367.57-0ubuntu0.14.04.1_amd64.deb ...
Unpacking nvidia-367 (367.57-0ubuntu0.14.04.1) ...
Preparing to unpack .../libcuda1-352_367.57-0ubuntu0.14.04.1_amd64.deb ...
Unpacking libcuda1-352 (367.57-0ubuntu0.14.04.1) over (352.63-0ubuntu0.14.04.1) ...
Selecting previously unselected package libcuda1-367.
Preparing to unpack .../libcuda1-367_367.57-0ubuntu0.14.04.1_amd64.deb ...
Unpacking libcuda1-367 (367.57-0ubuntu0.14.04.1) ...
Preparing to unpack .../nvidia-opencl-icd-352_367.57-0ubuntu0.14.04.1_amd64.deb ...
Unpacking nvidia-opencl-icd-352 (367.57-0ubuntu0.14.04.1) over (352.63-0ubuntu0.14.04.1) ...
dpkg: warning: unable to delete old directory '/etc/OpenCL/vendors': Directory not empty
dpkg: warning: unable to delete old directory '/etc/OpenCL': Directory not empty
Selecting previously unselected package nvidia-opencl-icd-367.
Preparing to unpack .../nvidia-opencl-icd-367_367.57-0ubuntu0.14.04.1_amd64.deb ...
Unpacking nvidia-opencl-icd-367 (367.57-0ubuntu0.14.04.1) ...
Processing triggers for man-db (2.6.7.1-1ubuntu1) ...
Processing triggers for hicolor-icon-theme (0.13-1) ...
Processing triggers for mime-support (3.54ubuntu1.1) ...
Processing triggers for gnome-menus (3.10.1-0ubuntu2) ...
Processing triggers for desktop-file-utils (0.22-1ubuntu1) ...
Processing triggers for bamfdaemon (0.5.1+14.04.20140409-0ubuntu1) ...
Rebuilding /usr/share/applications/bamf-2.index...
Processing triggers for ureadahead (0.100.0-16) ...
Setting up libcurl3-gnutls:amd64 (7.35.0-1ubuntu2.10) ...
Setting up libcurl3:amd64 (7.35.0-1ubuntu2.10) ...
Setting up curl (7.35.0-1ubuntu2.10) ...
Setting up keybase (1.0.18-20161104161546.6537940) ...
Setting up nvidia-367 (367.57-0ubuntu0.14.04.1) ...
update-alternatives: using /usr/lib/nvidia-367/ld.so.conf to provide /etc/ld.so.conf.d/x86_64-linux-gnu_GL.conf (x86_64-linux-gnu_gl_conf) in auto mode
update-alternatives: using /usr/lib/nvidia-367/ld.so.conf to provide /etc/ld.so.conf.d/x86_64-linux-gnu_EGL.conf (x86_64-linux-gnu_egl_conf) in auto mode
update-alternatives: using /usr/lib/nvidia-367/alt_ld.so.conf to provide /etc/ld.so.conf.d/i386-linux-gnu_GL.conf (i386-linux-gnu_gl_conf) in auto mode
update-alternatives: using /usr/lib/nvidia-367/alt_ld.so.conf to provide /etc/ld.so.conf.d/i386-linux-gnu_EGL.conf (i386-linux-gnu_egl_conf) in auto mode
update-alternatives: using /usr/share/nvidia-367/glamor.conf to provide /usr/share/X11/xorg.conf.d/glamoregl.conf (glamor_conf) in auto mode
update-initramfs: deferring update (trigger activated)
INFO:Enable nvidia-367
DEBUG:Parsing /usr/share/ubuntu-drivers-common/quirks/dell_latitude
DEBUG:Parsing /usr/share/ubuntu-drivers-common/quirks/lenovo_thinkpad
DEBUG:Parsing /usr/share/ubuntu-drivers-common/quirks/put_your_quirks_here
Adding system user `nvidia-persistenced' (UID 120) ...
Adding new group `nvidia-persistenced' (GID 127) ...
Adding new user `nvidia-persistenced' (UID 120) with group `nvidia-persistenced' ...
Not creating home directory `/'.
Loading new nvidia-367-367.57 DKMS files...
First Installation: checking all kernels...
Building only for 3.13.0-100-generic
Building for architecture x86_64
Building initial module for 3.13.0-100-generic
Done.

nvidia_367:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-100-generic/updates/dkms/

nvidia_367_modeset.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-100-generic/updates/dkms/

nvidia_367_drm.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-100-generic/updates/dkms/

nvidia_367_uvm.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-100-generic/updates/dkms/

depmod....

DKMS: install completed.
Setting up libcuda1-367 (367.57-0ubuntu0.14.04.1) ...
Setting up libcuda1-352 (367.57-0ubuntu0.14.04.1) ...
Setting up nvidia-opencl-icd-367 (367.57-0ubuntu0.14.04.1) ...
Setting up nvidia-opencl-icd-352 (367.57-0ubuntu0.14.04.1) ...
Processing triggers for libc-bin (2.19-0ubuntu6.9) ...
Processing triggers for initramfs-tools (0.103ubuntu4.4) ...
update-initramfs: Generating /boot/initrd.img-3.13.0-100-generic
Processing triggers for shim-signed (1.18~14.04.1+0.8-0ubuntu2) ...
Log ended: 2016-11-04 13:33:17