linux-kernel - Re: ACPICA 20140214 auto-serialize weirds my machine...

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Date:	Fri, 14 Mar 2014 18:38:01 +0100
From:	Sabrina Dubroca <sd@...asysnail.net>
To:	Valdis Kletnieks <Valdis.Kletnieks@...edu>
Cc:	Lv Zheng <lv.zheng@...el.com>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Bob Moore <robert.moore@...el.com>,
	Len Brown <lenb@...nel.org>, linux-kernel@...r.kernel.org,
	linux-acpi@...r.kernel.org
Subject: Re: ACPICA 20140214 auto-serialize weirds my machine...

Hi,

2014-03-14, 12:05:01 -0400, Valdis Kletnieks wrote:
> Surprisingly enough, this hasn't seemed to have bitten many Linux people yet,
> Google only finds a BSD thread (where the same ACPICA code is in use):
> 
> http://comments.gmane.org/gmane.os.dragonfly-bsd.user/1817

I was about to report the same issue on a Dell Latitude D830. Boot
failure, flood of these messages:

ACPI Exception: AE_AML_MUTEX_ORDER, while evaluating GPE method [_L1C] (20140214/evgpe-580)
ACPI Error: Method parse/execution failed [\GPE._L1C] (Node f5e0c9a8), AE_AML_MUTEX_ORDER (20140214/psparse-536)
ACPI Error: Cannot acquire Mutex for method [SX30], current SyncLevel is too large (1) (20140214/dsmethod-362)
ACPI Exception: AE_AML_MUTEX_ORDER, while evaluating GPE method [_L1C] (20140214/evgpe-580)

With acpi_no_auto_serialize things look good.


Before I tried that option, a bisection led me to remove
"| AML_CREATE" from commit f56b05bd111b. That made the laptop boot,

things seemed okay, except for the battery not being detected: the
normal battery line was gone ("ACPI: Battery Slot [BAT0] (battery
present)") and there's this instead:

ACPI Error: Cannot acquire Mutex for method [SX45], current SyncLevel is too large (1) (20140214/dsmethod-362)
ACPI Error: Method parse/execution failed [\_SB_.BIF_] (Node f5c250d8), AE_AML_MUTEX_ORDER (20140214/psparse-536)
ACPI Error: Method parse/execution failed [\_SB_.BAT0._BIF] (Node f5c25168), AE_AML_MUTEX_ORDER (20140214/psparse-536)
ACPI Exception: AE_AML_MUTEX_ORDER, Evaluating _BIF (20140214/battery-416)


-- 
Sabrina
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