Jtdcftul

When installing update, response comes back:

Check if you are using third party repositories. If so disable them, since they are a common source of problems.
Furthermore run the following command in a Terminal: apt-get install -f
Transaction failed: The package system is broken
The following packages have unmet dependencies:

libglx-mesa0: Depends: libglapi-mesa (= 18.0.5-0ubuntu0~18.04.1) but 18.2.2-0ubuntu1~18.04.1 is installed
Depends: libx11-6 (>= 2:1.4.99.1) but 2:1.6.4-3ubuntu0.1 is installed
Depends: libxdamage1 (>= 1:1.1) but 1:1.1.4-3 is installed
Depends: zlib1g (>= 1:1.1.4) but 1:1.2.11.dfsg-0ubuntu2 is installed

nothing else is running (no, no X11 either)---

lsmod | grep nvidia.drm returns
nvidia_drm 40960 2
nvidia_modeset 1089536 2 nvidia_drm
drm_kms_helper 172032 2 nvidia_drm,i915
drm 401408 16 drm_kms_helper,nvidia_drm,i915

sudo modprobe -rf nvidia_drm seems to work as does
sudo modprobe -rf nvidia_modeset

However, lsmod | grep nvidia.drm shows them to still be there

sudo modprobe -rf drm_kms_helper yields
modprobe: FATAL: Module drm is in use.
same with
sudo modprobe -rf drm

an attempt to upgrade the Nvidia driver to the latest (download and run) gives:

ERROR: An NVIDIA kernel module 'nvidia-drm' appears to already be loaded in your kernel. This may be because it is in use (for

example, by an X server, a CUDA program, or the NVIDIA Persistence Daemon), but this may also happen if your kernel was

configured without support for module unloading. Please be sure to exit any programs that may be using the GPU(s) before
attempting to upgrade your driver. If no GPU-based programs are running, you know that your kernel supports module

unloading, and you still receive this message, then an error may have occured that has corrupted an NVIDIA kernel

module's usage count, for which the simplest remedy is to reboot your computer

switching to su, I ran
systemctl isolate multi-user.target
which killed the computer, and upon reload, same problem

I'm at an impass... ANYONE???