Public bug reported:
SYSTEM:
Laptop: ASUS ROG GL552VW
OS: Ubuntu 20.04
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 wanted to downgrade from
nvidia-driver-460 by installing nvidia-driver-440 (which actually is a
transitional package to nvidia-driver-450). 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 dropping into safe mode and uninstalling linux-
modules-nvidia-460 packages and instead installing linux-modules-
nvidia-450 packages.
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:
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:
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)
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal ubiquity-20.04.15.10
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https://bugs.launchpad.net/bugs/1916971
Title:
After fresh install, downgrading Nvidia driver doesn't update nvidia
modules in kernel
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