Suspend for the X1 Carbon 2018
Unfortunately the X1 Carbon 2018 does not support suspend on Linux. There's an ongoing discussion in the Lenovo Support Forums. With some help from the Arch Linux Community, I was able to create an ACPI override for the DSDT. This enables full support of S3 suspend on Linux.
Prerequisites
This guide is written for Arch Linux but should work with any distribution out there.
BIOS version
The current BIOS version for the X1 Carbon 2018 is 1.25
. You can download the update ISO from
the Lenovo Support Site.
BIOS update
If you wanna update via USB drive use geteltorito.
geteltorito -o x1c2018-122.img n23ur06w.iso
sudo dd if=x1c2018-122.img of=/dev/sdX bs=512K
Reboot from USB and follow instructions.
Tools
Make sure that you have iasl
(via acpica) and cpio
(via cpio) installed.
BIOS settings
- Set
Thunderbolt BIOS Assist Mode
toEnabled
(viaConfig
→Thunderbolt 3
). - (Unconfirmed): Disable
Secure Boot
Generating the override
curl -O https://raw.githubusercontent.com/fiji-flo/x1carbon2018s3/master/generate_and_apply_patch.sh
chmod +x generate_and_apply_patch.sh
./generate_and_apply_patch.sh
Loading the override on boot
Edit your boot loader configuration and add /acpi_override
to the initrd
line.
To ensure S3
is used as sleep default add mem_sleep_default=deep
to you kernel parameters.
If you're using systemd-boot your
/boot/loader/entries/arch.conf
might look like this:
title Arch Linux ACPI
linux /vmlinuz-linux
initrd /intel-ucode.img
initrd /acpi_override
initrd /initramfs-linux.img
options root=/dev/nvme0n1p2 rw i915.enable_guc=3 mem_sleep_default=deep
Verify that it's working
After rebooting check the output of:
dmesg | grep -i "acpi: (supports"
should look like this:
[ 0.230796] ACPI: (supports S0 S3 S4 S5)
See also
Esonn did an initial blog post about my patch with some more detailed explanation.