On Lenovo ThinkPad X1 Carbon - the 5th Generation, enabling an earlier EC
event freezing timing causes acpitz-virtual-0 to report a stucked 48C
temparature. And with EC firmware revisioned as 1.14, without reverting
back to old EC event freezing timing, the fan still blows up after a system
resume (see comment 168 on link #1).
This reverts the culprit change so that the regression can be fixed without
upgrading the EC firmware.
Fixes: d30283057ecd ("ACPI / EC: Enable event freeze mode to improve event handling")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=191181 [#1]
Tested-by: Damjan Georgievski <gdamjan@xxxxxxxxx>
Signed-off-by: Lv Zheng <lv.zheng@xxxxxxxxx>
Cc: Stable <stable@xxxxxxxxxxxxxxx> # 4.9+
---
drivers/acpi/ec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 05e4eb5..ddb01e9 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -147,7 +147,7 @@ static unsigned int ec_storm_threshold __read_mostly = 8;
module_param(ec_storm_threshold, uint, 0644);
MODULE_PARM_DESC(ec_storm_threshold, "Maxim false GPE numbers not considered as GPE storm");
-static bool ec_freeze_events __read_mostly = true;
+static bool ec_freeze_events __read_mostly = false;
module_param(ec_freeze_events, bool, 0644);
MODULE_PARM_DESC(ec_freeze_events, "Disabling event handling during suspend/resume");
--
2.7.4