Comment by yaantc

> I have a Lenovo Thinkpad X1 Carbon (6th edition) and it's sleep was broken (and still

> partially broken) because Lenovo only implemented the new S0 low power idle "Modern

> Standby" (what a name!), without implementing the S3 mode as well.

Good news: please update your firmware, and you will gain the option to either use this new S0 mode (for Windows) or the S3 mode (for Linux) in the firmware. This is not perfect if you're dual booting, but if you're only running Linux it solves the issue.

Also, you can now update your firmware from Linux using fwupdmgr. Be aware there's a Lenovo bug if you're dual booting: you'll end directly on Windows after an update. So keep a Refind USB key around, use it to boot Linux, and reinstall EFI grub. If you're pure Linux, no such problem.