Comment 122 for bug 1958019

(In reply to chenyh570 from comment #108)
> it saids "[s2idle]"

In this case S3 sleep is deactivated. You could try to follow the section "Manual method" in https://wiki.archlinux.org/index.php/Lenovo_ThinkPad_X1_Yoga_(Gen_3)#Enabling_S3_(with_BIOS_version_1.33_and_after), but instead of the patch it says there just replace
   Name (SS3, Zero)
with
   Name (SS3, One)
and in a line at the top like
   DefinitionBlock ("", "DSDT", 2, "LENOVO", "CB-01 ", 0x00000002)
you need to increment the last number (change it to 0x00000003 in this case). This is what it took for me to get S3 sleep working, and then right after suspending the speakers work if playback is started within a magical window of a few seconds.