From: Deak, Imre
Subject: 4.9-rc1: [TMP_] ACPI namespace lookup failure, AE_ALREADY_EXISTS
after upgrading to 4.9-rc1 I get the following errors occasionally
during boot and suspend-to-ram on an APL system:
[ 59.513434] ACPI Error: [TMP_] Namespace lookup failure, AE_ALREADY_EXISTS
[ 59.513446] ACPI Exception: AE_ALREADY_EXISTS, During name lookup/catalog
[ 59.513469] ACPI Error: Method parse/execution failed [\_SB.PCI0.SCPG]
[ 59.515415] ACPI Error: Method parse/execution failed [\_SB.PCI0.SDHA._PS3] (Node
[ 59.517118] ACPI: Marking method _PS3 as Serialized because of AE_ALREADY_EXISTS
Could you send me acpidump output?
Other than these error messages, booting and suspend/resume seems to work ok.
Bisecting points to
Author: Lv Zheng <lv.zheng(a)intel.com>
Date: Wed Sep 7 14:07:10 2016 +0800
ACPICA: Namespace: Fix dynamic table loading issues
Reverting this on top of 4.9-rc1 gets rid of the error messages.
This fix is essential.
Without this, all of other ACPICA fixes can easily fall into dead locks.
So we won't simply revert it just because of non-functional-failure error messages.
Instead, we will improve it.
Thanks and best regards