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Updated from Focal Fossa to Ubuntu 20.04 Jammin Jellyfish - Reboot Fail

td flag

I received the Jammin Jellyfish update this morning. I followed procedure and all was going well until I re-booted. Black screen. I held button to turn off. I restarted and it would start reboot and then back to black screen. I can get to safe mode but no idea what I am looking for or to do. Very new to Linux. I am using a Lenovo T14 . Thank you in advance.

mook765 avatar
cn flag
20,04 is not Jammy Jellyfish but Bionic, so it's not clear to which version you upgraded.
user535733 avatar
cn flag
Reboot into GRUB (look it up if you don't know how). Select an older kernel to boot from.
JSteitz avatar
td flag
Thank you! I can reboot into GRUB but I am clueless what to look for or what to do to select an older kernel.
JSteitz avatar
td flag
I was able to reboot using recovery mode.
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