23.10 to 24.04 upgrade won't boot Encrypted ZFS

[ricmarques]

Hi, @mjb32803 (Mike)

(Usual disclaimer: please note that I'm just another Forum user here. I'm NOT a Ubuntu developer or Ubuntu MATE developer)

@mjb32803

I've upgraded two laptops from ubuntu- mate 23.10 to24.04. Both laptops have nvme ssds formatted ZFS with encryption. After the installation and reboot, appears that grub gets hung up on a gray screen. If I press esc key and select to boot to 24.04 but use the 6.5 kernel instead of 6.8, both laptops will boot and let me log in. Is anyone else having issues with the 6.8 kernel not working with encrypted ZFS after doing an upgrade?

There are several bug reports about Ubuntu 24.04 LTS ("Noble Numbat") booting into "black screen" / "blank screen", even without using ZFS (encrypted or not):

Bug #2063877 “Only black screen on boot with AMD Barcelo and Int...” : Bugs :...

Bug #2063983 “simpledrm / lightdm race condition leads to black ...” : Bugs :...

Bug #2063143 “sddm/simpledrm race conditions leads to frequent b...” : Bugs :...

You may want to change some GRUB (GRand Unified Boot Loader) settings that include removing "quiet splash" from the GRUB settings as I've explained in the following topic (as this seems to solve the problem for some people):

Green screen after update. Unable to boot past logo

Hi, @paul_jan (Usual disclaimer: please note that I'm just another Forum user here. I'm NOT a Ubuntu developer or Ubuntu MATE developer) I usually do the following changes in the GNU GRUB (GRand Unified Boot Loader) configuration in my Ubuntu MATE installations, that may also help you. Please, edit the /etc/default/grub file with administrator privileges, by running the following command (that will open the "Pluma" text editor as superuser): sudo pluma /etc/default/grub In tha…

If that (alone) doesn't work, you may also want to configure GRUB so it only boots to the older working Kernel as, for instance, @jymm (Jim) has explained in the following reply:

Green screen after update. Unable to boot past logo

You can if you edit the boot menu, or if you are not comfortable with that install grub-customizer which is a GUI program that makes it easy to do, and edit back when the newer kernel gets updated again. sudo apt-get install grub-customizer As I mentioned earlier in the post that is what I did with my wife's laptop when it happened to her. I also had to do it two other times when I had a Broacom WIFI card, that the kernel didn't support, then the next one worked.

I hope this helps Please reply back later in this same discussion topic that you've opened, to tell us what worked for you or not, as that can be very useful for other users.