After viewing /var/log/syslog and /var/log/kern.log I found the following kernel issue:
NVRM: API mistmatch: the client has version 375.26, but NVRM: this kernel module has the version 375.39. Please NVRM: make sure that kernel module and all NVIDIA driver NVRM: components have the same version.
I found Nvidia driver updated - mixed versions of 304.88 and 319.32 describing the same problem. To resolve my issue, I ran commands:
dpkg -l | grep nvidia sudo apt-get autoremove nvidia375 sudo apt-get --purge remove nvidia* dpkg -l | grep nvidia
The output from the last command confirmed no nvidia packages are installed. Thereafter, I ran:
sudo update-grub sudo update-initramfs -u sudo reboot
However, I am still experiencing the same kernel issue. Upon bootup, I am stuck in low graphics mode setup and kernel and /var/log/syslog and /var/log/kern.log still complaining client has Nvidia driver 375.26 and kernel module has Nvidia driver 375.39.
My current kernel is 4.4.0-64-generic.
Update1: To see the nvidia modules read in by the kernel, I ran this command.
$ lsmod | grep nvidia module size used by nvidia_drm 53248 0 nvidia_modeset 790528 1 nvidia_drm nvidia 12144640 1 nvidia_modeset drm_helper 155648 2 i915_bpo,nvidia_drm drm 364544 4 i915_bpo,drm_helper,nvidia_drm
Also found out using
modinfo module_name that these modules are located in folder
/lib/modules/4.4.0-64-generic/updates/dkms/ and their filenames are
nvidia.ko, and their version is 375.39.
2nd Question: Why do these modules still exist even after I have purged all nvidia packages? Should I remove them? If so, how?