Can you please provide the output of:
$ sudo ubuntu-drivers list
In the live session?
There are two ways to get the nvidia kernel driver. One option is to
compile it from scratch on the users machine with dkms. THe other option
is to install a metapackage linux-modules-nvidia for the appropriate
kernel flavour and the appropriate nvidia revsision which provides a
prebuild, not linked, and secureboot signed nvidia module.
So as to why.... the dkms one will not work or load on secureboot
machines, unless one goes through cryptic MOK key enrollment procedure
during boot.
The secureboot signed nvidia module works on secureboot machines without
any additional steps by the user.
But the caveat is that the secureboot signed ones must be kept in
correct tandem with the kernel flavour & nvidia revisions.
Anything you install from the PPA will not be secureboot signed, and
thus need MOK signing.
** Also affects: nvidia-graphics-drivers-460 (Ubuntu)
Importance: Undecided
Status: New
** Also affects: ubuntu-drivers-common (Ubuntu)
Importance: Undecided
Status: New
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to nvidia-graphics-drivers-460 in Ubuntu.
https://bugs.launchpad.net/bugs/1916971
Title:
After fresh Ubuntu 20.04 install, downgrading Nvidia driver doesn't
update nvidia modules in kernel
Status in nvidia-graphics-drivers-460 package in Ubuntu:
New
Status in ubiquity package in Ubuntu:
New
Status in ubuntu-drivers-common package in Ubuntu:
New
Bug description:
SYSTEM:
Laptop: ASUS ROG GL552VW
OS: Ubuntu 20.04.2 LTS
GRAPHICS: Nvidia Geforce GTX 960m AND Intel HD Graphics
Linux kernel version: 5.8.0-44-generic
SUMMARY:
From a fresh working install of Ubuntu 20.04, I downgraded from
nvidia-driver-460 by installing nvidia-driver-440 (which actually is a
transitional package to nvidia-driver-450 but I didn't know this).
After reboot I couldn't reach login-screen and instead got a black
screen.
Problem was that sudo apt-get install nvidia-driver-440 did not insert
nvidia modules v450 in kernel since never versions v460 were found.
This was solved by uninstalling linux-modules-nvidia-460 packages and
instead installing linux-modules-nvidia-450 packages (see WORKAROUND
below for instructions).
STEPS TO REPRODUCE:
Install Ubuntu 20.04. During installation, allow for the installation
of proprietary drivers.
Once Ubuntu 20.04 has started, open a terminal and run the following:
sudo add-apt-repository ppa:graphics-drivers/ppa
sudo apt-get update
sudo apt-get install nvidia-driver-440
sudo shutdown reboot now
PROBLEM:
After reboot, you can't reach login screen. Instead you get stuck
during bootup.
WORKAROUND:
WARNING: BETTER WORKAROUND PROBABLY EXISTS! DON'T JUST COPY-PASTE
INSTRUCTIONS. PAY ATTENTION TO WHAT NVIDIA DRVER AND LINUX KERNEL
VERSIONS ARE RELEVANT FOR YOU! Run dpkg --list | grep linux-image to
see what linux kenrel versions you have installed.
Remove the linux-modules-nvidia-460 packages and install the
corresponding linux-modules-nvidia-450 packages. In my case I had
Linux kernel versions 5.8.0-44-generic and 5.8.0-43-generic installed
so I did as follows from recovery mode with network (instead of
entering recovery mode, you should be able to press CTRL+ALT+F1 from
the blank screen after bootup, login with username and password and
then running these commands):
sudo apt-get autoremove --purge linux-modules-nvidia-460-5.8.0-44-generic
linux-modules-nvidia-460-5.8.0-43-generic
sudo apt-get install linux-modules-nvidia-450-5.8.0-44-generic
linux-modules-nvidia-450-5.8.0-43-generic
sudo shutdown reboot now
QUESTION:
Why was the linux-modules-nvidia-460 packages installed by the Ubuntu
installer to begin with? I ask since I later removed the linux-
modules-nvidia-450 packages (OBSERVE: 450, not 460) and used the
Additional Drivers GUI to update back to nvidia-driver-460. Now linux-
modules-nvidia-460 packages are NOT installed but the following still
outputs 460:
modinfo nvidia | grep -i version
LOG:
This is a relevant part of /var/log/apt/term.log for when I installed
nvidia-driver-440
nvidia.ko:
Running module version sanity check.
Error! Module version 450.102.04 for nvidia.ko
is not newer than what is already found in kernel 5.8.0-44-generic (460.39).
You may override by specifying --force.
nvidia-modeset.ko:
Running module version sanity check.
Error! Module version 450.102.04 for nvidia-modeset.ko
is not newer than what is already found in kernel 5.8.0-44-generic (460.39).
You may override by specifying --force.
nvidia-drm.ko:
Running module version sanity check.
Error! Module version 450.102.04 for nvidia-drm.ko
is not newer than what is already found in kernel 5.8.0-44-generic (460.39).
You may override by specifying --force.
nvidia-uvm.ko:
Running module version sanity check.
- Original module
- No original module exists within this kernel
- Installation
- Installing to /lib/modules/5.8.0-44-generic/updates/dkms/
This is a relevant part of /var/log/apt/term.log for when I installed
packages linux-modules-nvidia-450-5.8.0-44-generic and linux-modules-
nvidia-450-5.8.0-43-generic
Building module:
cleaning build area...
unset ARCH; [ ! -h /usr/bin/cc ] && export CC=/usr/bin/gcc; env NV_VERBOSE=1
'make' -j8 NV_EXCLUDE_BUILD_MODULES='' KERNEL_UNAME=5.8.0-43-generic
IGNORE_XEN_PRESENCE=1 IGNORE_CC_MISMATCH=1
SYSSRC=/lib/modules/5.8.0-43-generic/build LD=/usr/bin/ld.bfd
modules............
Signing module:
-
/var/lib/dkms/nvidia/450.102.04/5.8.0-43-generic/x86_64/module/nvidia-modeset.ko
-
/var/lib/dkms/nvidia/450.102.04/5.8.0-43-generic/x86_64/module/nvidia-uvm.ko
-
/var/lib/dkms/nvidia/450.102.04/5.8.0-43-generic/x86_64/module/nvidia-drm.ko
- /var/lib/dkms/nvidia/450.102.04/5.8.0-43-generic/x86_64/module/nvidia.ko
Secure Boot not enabled on this system.
cleaning build area...
DKMS: build completed.
nvidia.ko:
Running module version sanity check.
Good news! Module version 450.102.04 for nvidia.ko
exactly matches what is already found in kernel 5.8.0-43-generic.
DKMS will not replace this module.
You may override by specifying --force.
nvidia-modeset.ko:
Running module version sanity check.
Good news! Module version 450.102.04 for nvidia-modeset.ko
exactly matches what is already found in kernel 5.8.0-43-generic.
DKMS will not replace this module.
You may override by specifying --force.
nvidia-drm.ko:
Running module version sanity check.
Good news! Module version 450.102.04 for nvidia-drm.ko
exactly matches what is already found in kernel 5.8.0-43-generic.
DKMS will not replace this module.
You may override by specifying --force.
nvidia-uvm.ko:
Running module version sanity check.
- Original module
- No original module exists within this kernel
- Installation
- Installing to /lib/modules/5.8.0-43-generic/updates/dkms/
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubiquity (not installed)
ProcVersionSignature: Ubuntu 5.8.0-44.50~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-44-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.16
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Fri Feb 26 01:26:35 2021
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed
maybe-ubiquity quiet splash ---
InstallationDate: Installed on 2021-02-24 (1 days ago)
InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64
(20210209.1)
SourcePackage: ubiquity
Symptom: installer
UpgradeStatus: No upgrade log present (probably fresh install)
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