Re: /proc/acpi/battery/BAT0/info stale when battery changed on Thinkpad X60t

[Alexey Starikovskiy <aystarik@xxxxxxxxx>]

Please check if following patch helps:

diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index b1c723f..e5ca3a0 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -472,7 +472,7 @@ static void sysfs_remove_battery(struct acpi_battery 
*battery)

static int acpi_battery_update(struct acpi_battery *battery)
{
-    int result;
+    int result, old_present = acpi_battery_present(battery);
    result = acpi_battery_get_status(battery);
    if (result)
        return result;
@@ -483,7 +483,8 @@ static int acpi_battery_update(struct acpi_battery 
*battery)
        return 0;
    }
#endif
-    if (!battery->update_time) {
+    if (!battery->update_time ||
+        old_present != acpi_battery_present(battery)) {
        result = acpi_battery_get_info(battery);
        if (result)
            return result;

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