From: Ata İlhan Köktürk Date: Thu, 29 Jan 2026 14:48:56 +0000 (+0300) Subject: ACPI: battery: fix incorrect charging status when current is zero X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bb1256e0ddc7e9e406164319769b9f8d8389f056;p=thirdparty%2Fkernel%2Flinux.git ACPI: battery: fix incorrect charging status when current is zero On some laptops, such as the Huawei Matebook series, the embedded controller continues to report "Charging" status even when the charge threshold is reached and no current is being drawn. This incorrect reporting prevents the system from switching to battery power profiles, leading to significantly higher power (e.g., 18W instead of 7W during browsing) and missed remaining battery time estimation. Validate the "Charging" state by checking if rate_now is zero. If the hardware reports charging but the current is zero, report "Not Charging" to user space. Signed-off-by: Ata İlhan Köktürk [ rjw: Whitespace fix, braces added to an inner if (), new comment rewrite ] [ rjw: Changelog edits ] Link: https://patch.msgid.link/20260129144856.43058-1-atailhan2006@gmail.com Signed-off-by: Rafael J. Wysocki --- diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c index 151a9f6455113..3bbddd6f622c8 100644 --- a/drivers/acpi/battery.c +++ b/drivers/acpi/battery.c @@ -212,7 +212,14 @@ static int acpi_battery_get_property(struct power_supply *psy, if (battery->state & ACPI_BATTERY_STATE_DISCHARGING) val->intval = acpi_battery_handle_discharging(battery); else if (battery->state & ACPI_BATTERY_STATE_CHARGING) - val->intval = POWER_SUPPLY_STATUS_CHARGING; + /* Validate the status by checking the current. */ + if (battery->rate_now != ACPI_BATTERY_VALUE_UNKNOWN && + battery->rate_now == 0) { + /* On charge but no current (0W/0mA). */ + val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; + } else { + val->intval = POWER_SUPPLY_STATUS_CHARGING; + } else if (battery->state & ACPI_BATTERY_STATE_CHARGE_LIMITING) val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; else if (acpi_battery_is_charged(battery))