[solved] Nvidia driver (legacy 304) won’t stay downgraded

[chatan]

I have an older onboard nVidia graphics card, namely: NVIDIA C61 [GeForce 6100 nForce 405]
For a long time I’ve had to use the proprietary nvidia-304 drivers, but since the version went to 304.132, I can only get a black screen, so I downgraded to 304.131.  Coming out of suspend, all is good, but after a few wake-ups I get the "screen locker is broken" screen.  I can follow the loginctl unlock-sessions instructions and get back to the desktop.   I’ve tired numerous things including purging nvidia* and installing the 304-131 drivers with commands like:

1. [font=Arial]sudo apt-get remove --purge nvidia-* libcuda*[/font]
   
2. [font=Arial]sudo apt-get install nvidia-304-updates=304.131\* libcuda1-304-updates=304.131\* nvidia-opencl-icd-304-updates=304.131\*[/font]
   
3. [font=Arial]Went to synaptic and held those 3 packages.[/font]
   

Which will work for a day or two, but inevitably, the drivers will revert to 304.132 and can only get black screens.

When things are good here what I have:

Code:

user@tiger-maui:~$ dmesg | grep NVIDIA
[   17.308192] NVRM: loading NVIDIA UNIX x86_64 Kernel Module  304.131  Sun Nov  8 21:43:33 PST 2015

Code:

user@tiger-maui:~$ dpkg -l | grep -i nvidia
ii  libcuda1-304-updates                            304.131-0ubuntu3                                amd64        NVIDIA CUDA runtime library
rc  nvidia-304                                      304.131-0ubuntu3                                amd64        NVIDIA legacy binary driver - version 304.131
ii  nvidia-304-updates                              304.131-0ubuntu3                                amd64        NVIDIA legacy binary driver - version 304.131
rc  nvidia-opencl-icd-304                           304.131-0ubuntu3                                amd64        NVIDIA OpenCL ICD
ii  nvidia-opencl-icd-304-updates                   304.131-0ubuntu3                                amd64        NVIDIA OpenCL ICD
ii  nvidia-settings                                 361.42-0ubuntu1                                 amd64        Tool for configuring the NVIDIA graphics driver

Code:

user@tiger-maui:~$ inxi -G
Graphics:  Card: NVIDIA C61 [GeForce 6100 nForce 405]
         Display Server: X.Org 1.18.4 driver: nvidia Resolution: 1440x900@59.89hz
         GLX Renderer: GeForce 6100 nForce 405/integrated/SSE2 GLX Version: 2.1.2 NVIDIA 304.131

Then without me doing anything, the 304.132 drivers show up like magic and I have the black screens, broken screen lockers on resume, etc:

Code:

user@tiger-maui:~$ dpkg -l | grep -i nvidia
ii  libcuda1-304                                    304.132-0ubuntu0.16.04.2                        amd64        NVIDIA CUDA runtime library
iF  nvidia-304                                      304.132-0ubuntu0.16.04.2                        amd64        NVIDIA legacy binary driver - version 304.132
iU  nvidia-304-updates                              304.132-0ubuntu0.16.04.2                        amd64        Transitional package for nvidia-304
iU  nvidia-opencl-icd-304                           304.132-0ubuntu0.16.04.2                        amd64        NVIDIA OpenCL ICD
iU  nvidia-opencl-icd-304-updates                   304.132-0ubuntu0.16.04.2                        amd64        Transitional package for nvidia-opencl-icd-304
ii  nvidia-settings                                 361.42-0ubuntu1                                 amd64        Tool for configuring the NVIDIA graphics driver

When I have the problems, I also get this:

Code:

NVRM: API mismatch: the client has the version 304.132, but this kernel module has the version 304.131.  Please make sure that this kernel module and all NVIDIA driver components have the same version.

This is what my synaptic looks like holding the 304.131 packages:
[font=Arial]
I've been googling all sort of terms, and trying various things, but all end up with the same story.  
Help ??
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