** Description changed:
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
+ 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). 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 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:
+ as follows from recovery mode with network (instead 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/
+ - 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
+ 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
+ -
/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
+ -
