[Stable Update] 2023-03-31 - Kernels, Plasma 5.27 LTS, Pamac, Phosh, Mesa, LibreOffice

[Rulinux]

@philm

GRUB, LUKS and full disk encryption: ‘no such cryptodisk found’

Following grub’s update, new configuration may be needed to be manually applied:

• Check for modifications to /etc/default/grub
  Most notably, if you use LUKS with full disk encryption, you may need to:
  • check that GRUB_ENABLE_CRYPTODISK=y is not commented out
• Don’t use tools like grub-customizer as it may create issues with the grub.cfg file.
• Check if the UUID of your encrypted drive matches in your config files.
• Based on the manual , unlike filesystem UUIDs, UUIDs for encrypted devices must be specified without dash separators. So check /boot/grub/grub.cfg for entries like cryptomount -u 3722dfb2-3b32-414b-bd59-4329fa92b6a9 and try to remove the dash separators.
• If you modified the above configuration, you then need to update the grub menu with sudo update-grub.
• A message “no such cryptodisk found” may appear on the following reboot, but should not prevent you from continuing by typing any key.

After last upgrade I had a black desktop screen problem. I followed these instructions (prime driver not working for my dual gpu laptop) than it worked.
But on reboot I got the message “error: no such cryptodisk found. Perhaps a needed disk or cryptodisk is not loaded”
I enabled GRUB_ENABLE_CRYPTODISK=y in /etc/default/grub, did sudo update-grub and rebooted. But than the black desktop screen came back again. I have set it back again for now.

Regarding your other suggestions: /boot/grub/grub.cfg “…try to remove the dash separators”, does it mean the UUID has to be written like this instead (in your example): ’ 3722dfb23b32414bbd59-4329fa92b6a9??

What can be done to keep away the black desktop screen (including the KDE Plasma ssdm still does not appear in color anymore) and getting rid of the error message on booting as well.

I do have one luks ssd for root and another separated luks hard disk for my data. For the second luks hard disk I have to enter always the password on boot as well.