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diff --git a/share/man/man4/acpi.4 b/share/man/man4/acpi.4
--- a/share/man/man4/acpi.4
+++ b/share/man/man4/acpi.4
@@ -23,7 +23,7 @@
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
-.Dd July 15, 2024
+.Dd March 21, 2026
.Dt ACPI 4
.Os
.Sh NAME
@@ -122,22 +122,21 @@
Some newer systems require use of this register, while some only work
with legacy rebooting support.
.It Va hw.acpi.lid_switch_state
-Suspend state
-.Pq Li S1 Ns \[en] Ns Li S5
+Sleep type
+.Pq Li awake , Li standby , Li s2mem , Li s2idle , Li hibernate , Li poweroff
to enter when the lid switch (i.e., a notebook screen) is closed, or
.Dq Li NONE
.Pq do nothing .
Default is
.Dq Li NONE .
.It Va hw.acpi.power_button_state
-Suspend state
-.Pq Li S1 Ns \[en] Ns Li S5
+Sleep type
+.Pq Li awake , Li standby , Li s2mem , Li s2idle , Li hibernate , Li poweroff
to enter when the power button is pressed, or
.Dq Li NONE
.Pq do nothing .
Default is
-.Li S5
-(power-off nicely).
+.Li poweroff .
.It Va hw.acpi.reset_video
Reset the video adapter from real mode during the resume path.
Some systems need this help, others have display problems if it is enabled.
@@ -152,19 +151,21 @@
Most current systems do not support
.Li S4BIOS .
.It Va hw.acpi.sleep_button_state
-Suspend state
-.Pq Li S1 Ns \[en] Ns Li S5
+Sleep type
+.Pq Li awake , Li standby , Li s2mem , Li s2idle , Li hibernate , Li poweroff
to enter when the sleep button is pressed.
This is usually a special function button on the keyboard.
-Default is
-.Li S3
-(suspend-to-RAM).
+Default is usually
+.Li s2mem
+if supported, and
+.Li s2idle
+if not.
.It Va hw.acpi.sleep_delay
Wait this number of seconds between preparing the system to suspend and
actually entering the suspend state.
Default is 1 second.
.It Va hw.acpi.supported_sleep_state
-Suspend states
+ACPI S-states
.Pq Li S1 Ns \[en] Ns Li S5
supported by the BIOS.
.Bl -tag -width indent

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