HP EliteBook 840 G8 reboots on s2idle resume, and HP EliteBook 845 G8 wakes up immediately on s2idle. Both are caused by the XMM7360 WWAN PCI card. There's a WWAN specific method to really turn off the WWAN via EC: Method (_PTS, 1, NotSerialized) // _PTS: Prepare To Sleep { ... If (CondRefOf (\_SB.PCI0.GP12.PTS)) { \_SB.PCI0.GP12.PTS (Arg0) } ... } Scope (_SB.PCI0.GP12) { ... Method (PTS, 1, Serialized) { If (^^LPCB.EC0.ECRG) { If ((PDID == 0xFFFF)) { Return (Zero) } POFF () SGIO (WWBR, One) Sleep (0x1E) Acquire (^^LPCB.EC0.ECMX, 0xFFFF) ^^LPCB.EC0.WWP = One Release (^^LPCB.EC0.ECMX) Sleep (0x01F4) } Return (Zero) } ... } So let's also invok _PTS for s2idle. Signed-off-by: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx> --- drivers/acpi/sleep.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index 09fd13757b65..7e84b4b09919 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -698,6 +698,7 @@ int acpi_s2idle_prepare(void) } acpi_enable_wakeup_devices(ACPI_STATE_S0); + acpi_enter_sleep_state_prep(ACPI_STATE_S0); /* Change the configuration of GPEs to avoid spurious wakeup. */ acpi_enable_all_wakeup_gpes(); -- 2.30.2