Thinkpad E14 RYZEN 5 4500U Kernel Update v5.8.10 Not Working

I am facing lots of issues on kernel 5.4 so I decided to update to kernel 5.8.10.

I am getting the following error message:error message

I am using Ubuntu 18.04.5 with lenovo bios 1.10 , secure boot disabled.

1 Answer

You’ll likely need to update the GRUB_CMDLINE_LINUX_DEFAULT in your /etc/default/grub file to include iommu=pt. If you cannot boot normally, you may need a Live USB to make this work.

1. Edit the Grub boot file as root:

   sudo vi /etc/default/grub

2. Add the iommu flag to GRUB_CMDLINE_LINUX_DEFAULT so that you have something like:

   GRUB_CMDLINE_LINUX_DEFAULT="quiet splash iommu=pt"

3. Save the file
4. Run the Grub updater. This is very important. Do not forget:

   sudo update-grub

5. Reboot

This should resolve the issue.