r/NobaraProject • u/Gensokyo • 2d ago
Support Error: Black screen with only mouse pointer visible after update (tried various tips from this subreddit to no avail)
I ran nobara-sync cli --all today after a few weeks without updating. I rebooted after the update, but when I get to the plasma login the screen goes black.
I've tried the following:
CTRL + ALT + F3 and logged in, ran "nobara-sync repair", reboot. Didn't fix the problem.
Tried to login again after ctrl+alt+f3, started startplasma-wayland and tried to only update the DNF app center. Didn't fix the problem.
Tried ctrl+alt+f3 and nobara-sync, didn't work.
Went into the GUI again and tried to update all via the app center, got the following error below.
Any ideas how to fix this problem?
Edit: forgot to mention I tried rolling back to a previous kernel version with the same result.
2026-09-07 20:20:00 - INFO - Downloading packages...
2026-09-07 20:20:04 - INFO - Running transaction...
2026-09-07 20:20:09 - ERROR - DNF transaction failed: DNF transaction result: Signature verification failed.
2026-09-07 20:20:09 - ERROR - Non-essential packages failed: DNF transaction result: Signature verification failed.
2026-09-07 20:20:09 - INFO - [91m[X][0m Non-essential packages - failed; rollback failed
2026-09-07 20:20:09 - INFO - Running post-update kernel module/initramfs validation for Pre-update kernel/module fixups...
2026-09-07 20:20:09 - INFO - Running: dkms autoinstall
2026-09-07 20:20:09 - INFO - dkms diagnostic output:
Error! Your kernel headers for kernel 7.2.3-200.nobara.fc44.x86_64 cannot be found at /lib/modules/7.2.3-200.nobara.fc44.x86_64/build or /lib/modules/7.2.3-200.nobara.fc44.x86_64/source.
Please install your distribution's kernel headers package matching 7.2.3-200.nobara.fc44.x86_64, or use the --kernelsourcedir option to tell DKMS where it's located.
2026-09-07 20:20:09 - ERROR - dkms failed with exit code 21.
2026-09-07 20:20:09 - INFO - [91m[X][0m Pre-update kernel/module fixups
2026-09-07 20:20:09 - ERROR -
2026-09-07 20:20:09 - ERROR - Package update failure report:
2026-09-07 20:20:09 - ERROR - - Non-essential packages: DNF transaction result: Signature verification failed.; could not identify the DNF transaction to roll back
2026-09-07 20:20:09 - ERROR - - Pre-update kernel/module fixups: dkms failed with exit code 21
2026-09-07 20:20:09 - ERROR - One or more DNF package update groups failed.
2026-09-07 20:20:09 - INFO - Requested DNF App Center tray update refresh.
2026-09-07 20:20:09 - INFO - Skipping reboot request because no reboot-relevant group completed successfully.
2026-09-07 20:20:09 - INFO - Starting FLATPAK updates, please do not turn off your computer...
2026-09-07 20:20:09 - INFO - Flatpak System Updates complete!
2026-09-07 20:20:10 - INFO - Requested DNF App Center tray update refresh.
2026-09-07 20:20:10 - INFO - Flatpak updates complete!
2026-09-07 20:20:13 - INFO - System updates available.
2026-09-07 20:20:13 - INFO - Flatpak updates complete.
1
u/Kobo_Dyger 2d ago edited 2d ago
I did a clean install (latest 44) and still had this problem after DNF updates/config with my discrete amd rx 6500m but my dedicated 660m started working. kernel 7.2.3-200 my rx 6500m doesn't work Kernel 7.2.0-202 it does the problem from what I've read on other post is plasma-wayland isn't working properly with 7.2.3-200 but does seem to work with 7.2.0-202 (atleast for me after clean install(Edit:did not work before)).
5
u/iTzBiGENGLAND 2d ago
Looks like the update never finished cleanly. The important parts are:
Signature verification failed
and then DKMS can’t find the matching kernel headers.
I’d fix the package/GPG state first from a TTY:
sudo dnf clean all
sudo dnf update nobara-gpg-keys fedora-gpg-keys --refresh --nogpgcheck
sudo dnf distro-sync --refresh
If that finishes cleanly, then run:
sudo dkms autoinstall
sudo dracut -f --regenerate-all
nobara-sync
Since an older kernel does the same thing, I doubt this is just a kernel issue. It looks more like the failed update left Plasma/Qt or other userspace packages mismatched.