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authorKai-Heng Feng <kai.heng.feng@canonical.com>2020-10-30 15:06:57 +0800
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2020-11-10 19:00:44 +0100
commitd60cd06331a3566d3305b3c7b566e79edf4e2095 (patch)
tree224d047f547a25e906f05050fc5d228cde26cff6 /kernel
parentf8394f232b1eab649ce2df5c5f15b0e528c92091 (diff)
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: Kai-Heng Feng <kai.heng.feng@canonical.com> [ rjw: Subject edit ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/reboot.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/reboot.c b/kernel/reboot.c
index e7b78d5ae1ab..7e5aa1f78693 100644
--- a/kernel/reboot.c
+++ b/kernel/reboot.c
@@ -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)