Since version 5.0.35-7, nvidia-cuda-toolkit is no longer co-installable with nvidia-319, nvidia-319-updates, etc.
Attempting to install nvidia-cuda-toolkit results in the newer driver being removed and nvidia-304 being installed instead.
$ sudo apt-get install nvidia-cuda-toolkit
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
libcublas5.0 libcudart5.0 libcufft5.0 libcuinj64-5.0 libcurand5.0 libcusparse5.0 libnpp5.0 libnvtoolsext5.0
libvdpau-dev nvidia-304 nvidia-cuda-dev nvidia-cuda-doc nvidia-cuda-gdb nvidia-current nvidia-opencl-dev
nvidia-profiler nvidia-settings-304 nvidia-visual-profiler
Suggested packages:
libvdpau-doc libcupti-dev
The following packages will be REMOVED:
nvidia-319-updates nvidia-settings-319-updates
The following NEW packages will be installed:
libcublas5.0 libcudart5.0 libcufft5.0 libcuinj64-5.0 libcurand5.0 libcusparse5.0 libnpp5.0 libnvtoolsext5.0
libvdpau-dev nvidia-304 nvidia-cuda-dev nvidia-cuda-doc nvidia-cuda-gdb nvidia-cuda-toolkit nvidia-current
nvidia-opencl-dev nvidia-profiler nvidia-settings-304 nvidia-visual-profiler
0 upgraded, 19 newly installed, 2 to remove and 333 not upgraded.
Need to get 70,0 MB/333 MB of archives.
After this operation, 597 MB of additional disk space will be used.
Looks good. Can you please forward this to debian (if necessary)?