Stuck on "applying changes" in Software & Updates

[raphael75]

I have Kubuntu 24.04. I was trying to update to the latest nvidia driver. I had been using "Using NVIDIA driver metapackage from nvidia-driver-535 (proprietary)". I selected "Using NVIDIA driver metapackage from nvidia-driver-570 (proprietary)" and clicked Apply. It's been stuck on "Applying changes..." for more than 30 minutes.

It doesn't seem that it should take so long, & I clicked Cancel, but nothing happens. I'm not sure what to do now. Is there a way I can safely revert the changes, or safely switch to 570?

[raphael75]

I was able to get it working again. I went into recovery mode and tried to run "dpkg - Repair broken packages". I kept getting the error "temporary failure resolving us.archive.ubuntu.com". I eventually discovered that I had to run "grub - Update grub bootloader" first, and then dpkg was able to download and repair the broken packages.

It then booted into KDE using the nouveau driver. I then was able to open Software & Updates, go to Additional Drivers, and select the 570 driver. It was able to update it this time, and after restarting it's working again.

I had a similar issue to this a few years ago when I tried to update my NVIDIA driver and that time had to completely reinstall Kubuntu. Is it a safer process maybe to first switch to the nouveau driver in Software & Updates, restart, and then switch to the new NVIDIA driver? It seems that KDE/Kubuntu has an issue going directly from one NVIDIA driver to another. Or is there another recommended way to do it?

[Snowhog]

Is it a safer process maybe to first switch to the nouveau driver in Software & Updates, restart, and then switch to the new NVIDIA driver?

What I've observed being posted here, is that it is maybe more reliable to purge nvidia stuff, reboot so the nouveau driver is being used, then install the desired nvidia driver.