If you bought the Lenovo Thinkbook 15 G2 ARE with the AMD processor you probably noticed that the suspend option is not working in Linux. After some debugging I finally found a work around. The problem was present even with the latest kernel on a Arch Linux system with Kernel 5.12.14. The issue was also present under Ubuntu, with a slightly older kernel.
This fix has been tested on the 14 and 15 inch with the AMD processor, under Arch and Ubuntu.
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 iommu=soft"
This part can vary a lot between distributions, apply the changes with the following:
sudo grub-update
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 /boot/esp/loader/entries/<your_config>.conf
In your file you should see something similar as :
options root="LABEL=arch_os" rwadd the new option before the last double quote, like this:
options root="LABEL=arch_os" rw iommu=soft
Save the file and exit the editor
mkinitcpio -P reboot
Thanks for your help with this Luc.
On my Thinkbook 14 AMD G2, Suspend via OS now works great, thanks to your fix!
However, Suspend triggered by closing the lid was still a problem. (did not wake)
In my case I set HandleLidSwitch=ignore, then I could either manually suspend & close the lid or close the lid (screen blanks) & allow the system to self-suspend after 20 mins (or whatever the sys pref is)
In case this affects anyone else:
/etc/systemd/logind.conf
HandleLidSwitch=ignore
HandleLidSwitchExternalPower=ignore
if you permit, can I add this info to the post?
of course!
Thanks, this fixed resume on ThinkBook G2 14 ARE
thanks for the feedback!
Your solution works with Fedora and Pop Os installed on my Lenovo ThinkBook 15 G2 ARE Laptop. But it didn’t work with Manjaro installed.
in /etc/default/grub
Line GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash udev.log_priority=3″
GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash udev.log_priority=3 iommu=soft”
I changed it to.
So what did I do wrong?
I want to use Manjaro and I don’t want to give up for it.
after the modifications on Manjaro, please run upgrade-grub as root or sudo update-grub as non root user.
Hi,
I finally did.
sudo grub2-mkconfig -o /boot/grub/grub.cfg
command was giving an error.
sudo grub-mkconfig -o /boot/grub/grub.cfg
It worked when I gave the command.
Thanks for the feedback.