Fedora boots into black screen after update to KDE 6.7

Ask Fedora
1

Hey there. I did a fresh install of fedora 44 today. The installation process went fine, and everything worked after the initial reboot. I then updated the system, and when I rebooted to finish the update, my screen would just remain black. GRUB would show, so would the boot logo, but as soon as the login screen would be displayed, its just black. TTY works though.

With journalctl -b -p err, I got those errors:

failed to start plasma-login-kwin-wayland.service.

This application failed to start becuase no Qt platforms plugin could be initialized.

It then lists the available platform plugins (eglfs, linuxfb etc.)

Booting an older kernel version and booting the rescue mode from the GRUB results in the same issue.

Other people seem to have similar problems, at least according to the r/fedora and r/KDE subreddits.

Is anyone experiencing similar issues / does anyone know how to fix this?

2

I ran into the same issue. Are you running an Nvidia GPU by any chance? Could be related to that.

I got it working by reinstalling Fedora and then updating everything except Plasma with sudo dnf update --exclude="plasma*"

Then rebooting, installing the RPM Fusion NVIDIA drivers, rebooting again and then running sudo dnf update to get Plasma 6.7.

3

When reporting an issue you need to provide enough detail to allow others access to with similar hardware to reproduce the issue:

  1. basic data describing your system from running inxi -Fzxx in a terminal (you may need to install inxi), posted as web-discoverable text using the </> button.
  2. applying all Fedora and vendor firmware updates avoids lengthy exchanges comparing configurations and avoids wasting time on a solved problem.
4

This worked for me. I have an RTX4060 and after updating, got just a black screen. I was able to get to a terminal prompt, but ended up doing a reinstall that kept my home directory. Fortunately I don’t have anything critical on this desktop, but it was annoying.

5

You may be able to rollback the transaction that updated to Plasma 6.7 so that you don’t have to reinstall. See System won't boot in after latest update, only a black screen appears | Fedora 44 | Nvidia 660 - #7 by computersavvy

6

Just wanted to share my experience,

GPU: RTX 4070 Ti, CPU: Ryzen 9 7900X3D

Installed latest updates (which included Plasma 6.7) , PC was stuck on black screen after reboot to install updates (when it was launching display-manager target , did a hard-reboot and modified grub to boot into CLI only,

From CLI - launched the display-manager target, and from remote laptop watching the logs, saw this:

Jun 20 20:57:16 zend kwin_wayland[2293]: Failed to open /dev/dri/card1 device (Device or resource busy)

This was using GPU with open source drivers (what ever default is), installed NVIDIA drivers from prm fusion, and exact same error happens on non open source drivers.

This morning, figured let me plug in the screen into motherboard HDMI port, and it worked to get into graphical session this way.

I have full logs if someone needs?

7

This sounds like the nvidia driver did not get properly updated before the reboot.
Please try running sudo akmods --force --rebuild and allow that to complete then reboot and hopefully the nvidia GPU will work as it was doing before the upgrade.