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One day my touchpad stopped taking input so I rebooted my laptop & haven't since been able to return to Kubuntu. When choosing it in GRUB I see (1) the OEM logo for ~1 sec, (2) the Kubuntu splash screen for ~1 sec, (3) the OEM logo forever. I can enter recovery & boot from a live USB. Things I have tried:

  • enable & disable secure boot (shouldn't matter w/ EFI)
  • disable hibernate & fast boot in Windows 10; performed a cold shut down
  • my Ubuntu partition /dev/nvme01p7 has the boot flag per GParted.
  • sudo ubuntu-drivers autoinstall (Nvidia drivers I already had from the working installation)
  • ran dpkg & fsck in recovery (Ubuntu partition is mounted, also noted an error I'm ignoring)
  • ran recommended boot-repair: see the logs for the diagnostic & repair
  • sudo nano /etc/default/grub output
atloo1
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  • Cross-posted: https://unix.stackexchange.com/questions/606568/previous-successful-kubuntu-20-04-ltsb-efi-dual-boot-now-boot-looping – muru Aug 27 '20 at 05:40
  • When you are logged in, open a terminal and type sudo nano /etc/default/grub then copy the lines that start with GRUB_ and then edit your question above and paste those lines into it please. – darth_epoxy Aug 27 '20 at 09:51
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    I didn't realize Drive worked that way @Nmath. I've fixed this. – atloo1 Aug 27 '20 at 19:27
  • Done @darth_epoxy. – atloo1 Aug 27 '20 at 19:40
  • OK will post an answer but it's not 100% however it's easier to read in the Answer box... – darth_epoxy Aug 28 '20 at 11:38

1 Answers1

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Open a terminal and type sudo nano /etc/default/grub/
Then swap out & change these lines;

#GRUB_TIMEOUT_STYLE=hidden
GRUB_TIMEOUT_STYLE=menu
GRUB_CMDLINE_LINUX_DEFAULT="rhgb nosplash"

Commit the change in nano (Ctrl+O) then save over same name and exit (Ctrl+X).
Then type sudo update-grub then type sudo shutdown -r now and see what scrolls.

darth_epoxy
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  • A sea of green, unfortunately: https://imgur.com/a/jKN3yNZ – atloo1 Sep 08 '20 at 04:41
  • Green is good and you see it because of the nosplash but can you see any errors in the output text? I can't read anything on your vidcap. You can ignore the green [OK] lines but try and screenshot or something so you can read the other lines. If anything looks like an error, type that in a comment ot edit your question. – darth_epoxy Sep 08 '20 at 08:42