Linux – Fixing Suspend/Resume on AMD renoir Lenovo ThinkBook G2 ARE on kernel 5.19 , 6.0 and up

thinkbook 15 g2 are image

After 3 evenings of testing and hundreds of permutations, I finally found a setting that works to make suspend works on my laptop.

Current laptop: Lenovo Thinkbook G2 ARE with AMD processor 4700u (renoir)and 40GB ram

Fix suspend and resume

to find your kernel version, type

uname -a

For kernel 5.19, 6.0 and newer

add the boot parameter , if you had the previous iommu=soft, remove it.

amd_iommu=off

For kernel 5.18 and lower

add the boot parameter :

iommu=soft

On a GRUB system

If your system uses GRUB, edit the /etc/default/grub file. On the following line :

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

add the following :

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash <put parameter here>"

This part can vary a lot between distributions, apply the changes with the following:

sudo update-grub

or

grub2-mkconfig -o /boot/grub/grub.cfg

or

grub-mkconfig -o /boot/grub/grub.cfg

reboot

On a SYSTEMD-BOOT system

edit your config file, it could be any of the following:

/boot/loader/entries/<your_config>.conf
/boot/esp/loader/entries/<your_config>.conf

Note: on PopOS! the file is called : /boot/efi/loader/entries/Pop_OS-current.conf

If you still can find it, try with this:

sudo find /boot -iname '*.conf'

In your file you should see something similar as :

options root="LABEL=arch_os" rw

add the new option before the last double quote, like this:

options root="LABEL=arch_os" rw  <put your parameter here>

Note: on PopOS! it will look like this, add the iommu=soft after ro.

options root=UUID=... ro    iommu=soft   quiet loglevel=0 systemd.show_status=false splash 
reboot

Thanks to Man Son Ha for the details about PopOS!