Re: ACPI errors with 3.7-rc3

[Azat Khuzhin]

Update: laptop don't resume working not only after a long time held in suspend,
but also after a short period of time for example 3 minutes.
As for a long time - it about 24-36 hours.

On Sun, Dec 2, 2012 at 12:59 AM, Azat Khuzhin <dohardgopro@xxxxxxxxx> wrote:
> I tried this patch -  https://bugzilla.kernel.org/attachment.cgi?id=73510
> from https://bugzilla.kernel.org/show_bug.cgi?id=14733.
>
> And I don't see such messages any more.
> But another problem surfaced - laptop can't resume working after a
> long time held in suspend,
> end there is not messages in kern.log about that laptop trying to resume.
>
> On Sat, Nov 17, 2012 at 9:40 AM, Robert Hancock <hancockrwd@xxxxxxxxx> wrote:
>> On 11/09/2012 10:36 AM, Feng Tang wrote:
>>>
>>> On Fri, Nov 09, 2012 at 10:30:43PM +0800, Moore, Robert wrote:
>>>>
>>>> The ACPI Global Lock is in fact intended to provide exclusion between the
>>>> BIOS and the OS.
>>>> Bob
>>>
>>>
>>> Thanks for the info.
>>>
>>> And per my check, most of ACPI FW don't implement this lock, say
>>> after driver probe, the ec->global_lock will be 0.
>>
>>
>> The DSDT is supposed to define the _GLK control method on the EC if the BIOS
>> needs to perform its own access which may conflict with the OS usage. If it
>> doesn't, then it should be the case that either the BIOS doesn't touch the
>> EC itself or it uses a separate interface that doesn't cause conflicts with
>> what the OS is doing.
>>
>>>
>>> - Feng
>>>
>>>>
>>>>
>>>>> -----Original Message-----
>>>>> From: Tang, Feng
>>>>> Sent: Friday, November 09, 2012 1:29 AM
>>>>> To: Rafael J. Wysocki
>>>>> Cc: Greg KH; Azat Khuzhin; linux-acpi@xxxxxxxxxxxxxxx; Linux Kernel
>>>>> Mailing List; Zheng, Lv; Len Brown; Moore, Robert
>>>>> Subject: Re: ACPI errors with 3.7-rc3
>>>>>
>>>>> On Thu, Nov 08, 2012 at 05:49:40AM +0800, Rafael J. Wysocki wrote:
>>>>>>
>>>>>> On Tuesday, November 06, 2012 01:48:26 PM Greg KH wrote:
>>>>>>>
>>>>>>> On Tue, Nov 06, 2012 at 04:42:24PM +0400, Azat Khuzhin wrote:
>>>>>>>>
>>>>>>>> I'v also have such errors on my macbook pro.
>>>>>>>>
>>>>>>>> $ dmesg | tail
>>>>>>>> [17056.008564] ACPI Error: Method parse/execution failed
>>>>>>>> [\_SB_.PCI0.LPCB.EC__.SMB0.SBRW] (Node ffff88026547ea10), AE_TIME
>>>>>>>> (20120711/psparse-536)
>>>>>>>> [17056.011194] ACPI Error: Method parse/execution failed
>>>>>>>> [\_SB_.BAT0.UBST] (Node ffff88026547e678), AE_TIME
>>>>>>>> (20120711/psparse-536)
>>>>>>>> [17056.013793] ACPI Error: Method parse/execution failed
>>>>>>>> [\_SB_.BAT0._BST] (Node ffff88026547e740), AE_TIME
>>>>>>>> (20120711/psparse-536)
>>>>>>>> [17056.016383] ACPI Exception: AE_TIME, Evaluating _BST
>>>>>>>> (20120711/battery-464) [17056.511373] ACPI: EC: input buffer is
>>>>>>>> not empty, aborting transaction [17056.512672] ACPI Exception:
>>>>>>>> AE_TIME, Returned by Handler for [EmbeddedControl]
>>>>>>>> (20120711/evregion-501) [17056.515256] ACPI Error: Method
>>>>>>>> parse/execution failed [\_SB_.PCI0.LPCB.EC__.SMB0.SBRW] (Node
>>>>>>>> ffff88026547ea10), AE_TIME
>>>>>>>> (20120711/psparse-536)
>>>>>>>> [17056.517886] ACPI Error: Method parse/execution failed
>>>>>>>> [\_SB_.BAT0.UBST] (Node ffff88026547e678), AE_TIME
>>>>>>>> (20120711/psparse-536)
>>>>>>>> [17056.520479] ACPI Error: Method parse/execution failed
>>>>>>>> [\_SB_.BAT0._BST] (Node ffff88026547e740), AE_TIME
>>>>>>>> (20120711/psparse-536)
>>>>>>>> [17056.523070] ACPI Exception: AE_TIME, Evaluating _BST
>>>>>>>> (20120711/battery-464)
>>>>>>>
>>>>>>>
>>>>>>> I'm seeing this again right now.  I'm wondering if it's because I'm
>>>>>>> running on battery power at the moment:
>>>>>>>
>>>>>>> [41694.309264] ACPI Exception: AE_TIME, Returned by Handler for
>>>>>>> [EmbeddedControl] (20120913/evregion-501) [41694.309282] ACPI Error:
>>>>>>> Method parse/execution failed [\_SB_.PCI0.LPCB.EC__.SMB0.SBRW] (Node
>>>>>>> ffff88045cc64618), AE_TIME (20120913/psparse-536) [41694.309300]
>>>>>>> ACPI Error: Method parse/execution failed [\_SB_.BAT0.UBST] (Node
>>>>>>> ffff88045cc64988), AE_TIME (20120913/psparse-536) [41694.309310]
>>>>>>> ACPI Error: Method parse/execution failed [\_SB_.BAT0._BST] (Node
>>>>>>> ffff88045cc648c0), AE_TIME (20120913/psparse-536) [41694.309324]
>>>>>>> ACPI Exception: AE_TIME, Evaluating _BST (20120913/battery-464)
>>>>>>> [41694.809093] ACPI: EC: input buffer is not empty, aborting
>>>>>>> transaction
>>>>>>>
>>>>>>> ec_storm_threshold is still set to 8 in /sys/module/acpi/parameters/
>>>>>>> so that's not the issue here.
>>>>>>>
>>>>>>>> And also loadavg is too high ~ 10
>>>>>>>> While there is no process that load CPU up to 100% or like that.
>>>>>>>> I think that this because of processes that is done in kernel space.
>>>>>>>> (basically that one who write such errors)
>>>>>>>>
>>>>>>>> $ uname -a
>>>>>>>> Linux macbook-pro-sq 3.6.5macbook-pro-custom-v0.1 #4 SMP Sun Nov 4
>>>>>>>> 12:39:03 UTC 2012 x86_64 GNU/Linux
>>>>>>>
>>>>>>>
>>>>>>> Ah, ok, that means it's not something new in 3.7-rc, so maybe it's
>>>>>>> just never worked properly for this hardware :)
>>>>>>>
>>>>>>> So it's not a regression, just an ACPI issue, any ACPI developer
>>>>>>> have an idea about this?
>>>>>>
>>>>>>
>>>>>> Can you please send the output of acpidump from the affected
>>>>>> machine(s)?
>>>>>
>>>>>
>>>>> I doubt this problem is sometimes inevitable for some machines, because
>>>>> AFAIK most modern machines have the race problem for EC HW controller,
>>>>> as
>>>>> both OS side and the BIOS may access the EC HW at the same time
>>>>> without any race control.
>>>>>
>>>>> For this case, usually the battery and thermal modules (which may be
>>>>> controlled through EC) are always monitored by BIOS, when OS also
>>>>> frequently visit them too, the EC's own state machine may be broken and
>>>>> not responsive due to the race, then cause the timeout error.
>>>>> And how severe the problem will be depends on the EC HW, the quality of
>>>>> BIOS code and OS/driver code.
>>>>>
>>>>> Myself have seen the similar "ACPI: EC: input buffer is not empty,
>>>>> aborting transaction" error message on one laptop when its EC is busy
>>>>> visited by OS.
>>>>>
>>>>> btw, in EC driver I see a "ec->global_lock", don't know if it was
>>>>> designed
>>>>> to control the race between OS and BIOS.
>>>>>
>>>>> Thanks,
>>>>> Feng
>>>
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>>
>
>
>
> --
> Azat Khuzhin



-- 
Azat Khuzhin
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