Sorry for my late reply. What do you mean by "... in the live session"? Instead I executed that command from my Ubuntu installation (where I observed the bug) and the output is here further below.
@Dimitri are you saying that securedboot devices should avoid using the device drivers PPA? Also I'm currently on nvidia-driver-460 but I have no linux-modules-nvidia-460 packages installed. My system seems to work correctly. Is it OK that I don't have the linux-modules-nvidia-460 packages installed? Output of "sudo ubuntu-drivers list": nvidia-driver-418-server, (kernel modules provided by linux-modules-nvidia-418-server-generic-hwe-20.04) nvidia-driver-450-server, (kernel modules provided by linux-modules-nvidia-450-server-generic-hwe-20.04) nvidia-driver-460, (kernel modules provided by linux-modules-nvidia-460-generic-hwe-20.04) nvidia-driver-450, (kernel modules provided by linux-modules-nvidia-450-generic-hwe-20.04) nvidia-driver-390, (kernel modules provided by linux-modules-nvidia-390-generic-hwe-20.04) nvidia-driver-460-server, (kernel modules provided by linux-modules-nvidia-460-server-generic-hwe-20.04) -- 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) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-460/+bug/1916971/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
