Black screen problems during boot on Fedora after updating to the latest kernel are often linked to graphics driver conflicts, particularly with NVIDIA proprietary drivers. This issue can prevent the system from displaying the login screen or desktop environment, leaving users stuck with a blank or black screen. Addressing this problem involves verifying driver installations, kernel compatibility, and boot configurations.

Reinstall NVIDIA Drivers from RPM Fusion Repository

The most reliable method to fix black screen issues related to NVIDIA drivers after a kernel update is to ensure that the drivers are properly installed from the RPM Fusion repository rather than using the NVIDIA .run installer or incomplete installations.

Boot into a previous working kernel version through the GRUB menu. To do this, reboot your system and, at the GRUB screen, press e to edit the boot parameters or select an older kernel from the advanced options.

Once logged in, open a terminal and remove any existing NVIDIA drivers installed outside of RPM Fusion. If you installed drivers using the NVIDIA .run file, attempt to uninstall them with:

sudo ./NVIDIA-Linux-x86_64-xxx.xx.xx.run --uninstall

If this command reports that no driver is installed, proceed to the next step.

Remove any residual NVIDIA packages that may cause conflicts:

sudo dnf remove '*nvidia*'

Clear any leftover kernel modules and rebuild the kernel module dependencies:

sudo akmods --force --rebuild

Install the official NVIDIA drivers from RPM Fusion:

sudo dnf install akmod-nvidia xorg-x11-drv-nvidia-cuda

Wait at least five minutes after installation to allow the kernel modules to build properly.

Reboot the system normally and verify if the black screen issue is resolved.

This approach ensures that your NVIDIA drivers are correctly matched with the kernel version and installed in a way that Fedora supports, reducing the risk of driver conflicts or missing kernel modules causing the black screen.

Boot with an Older Kernel as a Temporary Workaround

If reinstalling drivers does not immediately resolve the issue, or you need quick access to your system, booting into a previous kernel version can provide temporary relief.

On system startup, access the GRUB menu by holding the Shift key or pressing Esc repeatedly (depending on your system).

Select “Advanced options for Fedora” and choose an older kernel version that previously worked without black screen issues.

Boot into that kernel and use the system normally.

To avoid selecting the older kernel every time, set it as the default kernel by editing the GRUB configuration. You can do this by running:

sudo grub2-set-default 'Fedora, with Linux x.x.x-x.fcxx.x86_64'

Replace the kernel version string with the one you want to default to. Then, update the GRUB configuration with:

sudo grub2-mkconfig -o /boot/grub2/grub.cfg

This method allows you to continue using your system while waiting for updated drivers or kernel patches that fix the issue permanently.

Modify Kernel Boot Parameters to Bypass Graphics Driver Issues

Sometimes, black screen problems occur due to kernel mode setting (KMS) conflicts with NVIDIA drivers. Adjusting kernel boot parameters can help bypass these conflicts.

At the GRUB menu, highlight the Fedora boot entry and press e to edit the boot parameters.

Locate the line beginning with linux or linuxefi. At the end of this line, add the following parameters:

nomodeset plymouth.enable=0

Press Ctrl + X or F10 to boot with these parameters temporarily.

If this allows the system to boot properly, consider making these changes permanent by editing the GRUB configuration file:

sudo nano /etc/default/grub

Add nomodeset plymouth.enable=0 to the GRUB_CMDLINE_LINUX line.

Update the GRUB configuration:

sudo grub2-mkconfig -o /boot/grub2/grub.cfg

Note: Using nomodeset disables kernel mode setting, which may reduce graphical performance or disable certain features, so use this as a troubleshooting step rather than a permanent fix.

Check System Logs for Driver Build Failures and Errors

System logs provide critical insights into what causes the black screen after a kernel update. Investigating these logs can help identify failed NVIDIA driver builds or other errors.

Boot into a working kernel or use a live USB environment to access your Fedora installation.

Open a terminal and examine the akmods build logs for NVIDIA by running:

journalctl --no-hostname -b -1 -g /var/cache/akmods.*failed.log | cat

This command searches for any akmod build failures during the previous boot.

Review the output for errors related to NVIDIA module compilation.

If errors are found, attempt to rebuild the kernel modules forcefully:

sudo akmods --force --rebuild

After rebuilding, reboot and check if the problem persists.

Regularly monitoring these logs after kernel updates helps ensure your NVIDIA drivers build correctly and prevents boot issues.

Additional Troubleshooting Tips

If your system uses Secure Boot, ensure that the NVIDIA kernel modules are properly signed or disable Secure Boot temporarily, as unsigned modules can cause boot failures.
Verify that the installed NVIDIA driver version supports your GPU model and the current kernel version.
Consider removing any Flatpak NVIDIA extensions temporarily, as they may interfere with the system drivers.
Switching the display server from Wayland to Xorg at the login screen can sometimes bypass black screen issues related to graphical session initialization.
Using the journalctl --since=today -p 3 command after booting into a working kernel shows recent system errors that can guide further troubleshooting.

Addressing black screen issues after Fedora kernel updates often requires a combination of verifying driver installations, adjusting boot parameters, and analyzing system logs. Keeping NVIDIA drivers updated via RPM Fusion and using tested kernel versions minimizes the risk of encountering this problem.

With these steps, your Fedora system should regain normal boot functionality and display output, restoring access to your desktop environment and applications.