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Situation

I have recently installed Ubuntu 20.04 LTS on a new HP 17-ca1124ng laptop.

Unfortunately, however, I realized that the OS will boot only when the laptop is charging. When trying to boot Ubuntu without having the laptop on a charger, I am asked to decrypt the hard drive (which works) but then the boot process just hangs on a black screen. Booting while on charger, then disconnecting from the charger works perfectly fine.

Resolution attempts

  • new install of Ubuntu 20.04 did not cut it
  • BIOS reset did not cut it
  • changing GRUB_CMDLINE_LINUX_DEFAULT in /etc/grub/default to
    • GRUB_CMDLINE_LINUX_DEFAULT="quiet splash dis_ucode_ldr" and running sudo update-grub did not cut it
    • GRUB_CMDLINE_LINUX_DEFAULT="splash" and running sudo update-grub to maybe get some info on what fails but everything is flagged as OK during boot

Questions

  1. Is this a hardware or software issue?
  2. If this is software related, how do I fix this?

Thanks in advance for your help!

Similar issues

2 Answers 2

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Edit your /etc/default/grub as such

GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash iommu=soft”

don't forget to...

sudo update-grub

then reboot.

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Might be of interest for those running Ubuntu 20.04 on Dell computers:

I had the same problem on a Dell Latitude 7300 and the accepted answer did not work for me, however the answer from the Dell community forum mentioned in the original post did work:

Edit /etc/default/grub setting GRUB_CMDLINE_LINUX_DEFAULT="quiet splash dis_ucode_ldr" and run sudo update-grub.

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  • This worked for me, I have a Latitude 5400
    – dixoen
    May 14, 2021 at 2:34

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