Commit d60cd063 authored by Kai-Heng Feng's avatar Kai-Heng Feng Committed by Rafael J. Wysocki
Browse files

PM: ACPI: reboot: Use S5 for reboot 

After reboot, it's not possible to use hotkeys to enter BIOS setup
and boot menu on some HP laptops.

BIOS folks identified the root cause is the missing _PTS call, and
BIOS is expecting _PTS to do proper reset.

Using S5 for reboot is default behavior under Windows, "A full
shutdown (S5) occurs when a system restart is requested" [1], so
let's do the same here.

[1] https://docs.microsoft.com/en-us/windows/win32/power/system-power-states



Signed-off-by: default avatarKai-Heng Feng <kai.heng.feng@canonical.com>
[ rjw: Subject edit ]
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent f8394f23

kernel/reboot.c

+2 −0
Original line number Diff line number Diff line
@@ -244,6 +244,8 @@ void migrate_to_reboot_cpu(void) 
void kernel_restart(char *cmd)

{

	kernel_restart_prepare(cmd);

	if (pm_power_off_prepare)

		pm_power_off_prepare();

	migrate_to_reboot_cpu();

	syscore_shutdown();

	if (!cmd)