* ACPI ERROR SMBus or IPMI write requires Buff of len 66, found 32...???? linux-3.0.0
@ 2011-10-31 21:16 Linda Walsh
2011-11-01 14:05 ` Bjorn Helgaas
0 siblings, 1 reply; 3+ messages in thread
From: Linda Walsh @ 2011-10-31 21:16 UTC (permalink / raw)
To: LKML
Was looking through boot log messages, and this one seemed 'new'...
is this saying that the device requires 66, but the driver allocated 32
bytes?
Or the opposite: i.e. driver requires 66 (according to some new
standard**) but the
device from 2009, has the 2009 standard of 32?
Just a WAG, but 20110413 looks like a date, that is certainly newer than
the system, though
it has had firmware upgrades (though none in the past 6 months or so...)...
Seems like a weird thing to be changed across drivers while not
providing for some backward
compat, but that's purely based on a notion that there's a driver/hw
version mismatch now
when before, there were no such error messages (maybe the error message
is new, and it's
always been broken? ;-) )...
as subj says linux-3.0.0, stock vanilla + the latest IMQ networkfilter
patch.
X64
[ 13.722612] ACPI Error: SMBus or IPMI write requires Buffer of length
66, found length 32 (20110413/exfield-285)
[ 13.733078] ACPI Error: Method parse/execution failed
[\_SB_.PMI0._GHL] (Node ffff880616962b18), AE_AML_BUFFER_LIMIT
(20110413/psparse-536)
[ 13.746189] ACPI Error: Method parse/execution failed
[\_SB_.PMI0._PMC] (Node ffff880616962a78), AE_AML_BUFFER_LIMIT
[ 13.755322] dca service started, version 1.12.1[ 13.761822]
(20110413/psparse-536)
[ 13.765509] ACPI Exception: AE_AML_BUFFER_LIMIT, Evaluating _PMC
(20110413/power_meter-773)
Did something that would cause this? I haven't determined what the
impact of the above
problem is -- it might be some status progs no longer work OR maybe
never worked, and now
may have a clue... ? Any insights?
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: ACPI ERROR SMBus or IPMI write requires Buff of len 66, found 32...???? linux-3.0.0
2011-10-31 21:16 ACPI ERROR SMBus or IPMI write requires Buff of len 66, found 32...???? linux-3.0.0 Linda Walsh
@ 2011-11-01 14:05 ` Bjorn Helgaas
2011-11-01 14:43 ` Matthew Garrett
0 siblings, 1 reply; 3+ messages in thread
From: Bjorn Helgaas @ 2011-11-01 14:05 UTC (permalink / raw)
To: Linda Walsh; +Cc: LKML, linux-acpi
[+cc linux-acpi]
On Mon, Oct 31, 2011 at 3:16 PM, Linda Walsh <lkml@tlinx.org> wrote:
>
>
> Was looking through boot log messages, and this one seemed 'new'...
Can you confirm that this error did not occur on a previous version?
What is the most recent version where it did not occur?
> is this saying that the device requires 66, but the driver allocated 32
> bytes?
>
> Or the opposite: i.e. driver requires 66 (according to some new standard**)
> but the
> device from 2009, has the 2009 standard of 32?
>
> Just a WAG, but 20110413 looks like a date, that is certainly newer than the
> system, though
> it has had firmware upgrades (though none in the past 6 months or so...)...
20110413 is basically the version number of the ACPI CA in Linux.
Generally, we don't remove support for old things, so if it worked in
the past, it should still work with newer versions.
> Seems like a weird thing to be changed across drivers while not providing
> for some backward
> compat, but that's purely based on a notion that there's a driver/hw version
> mismatch now
> when before, there were no such error messages (maybe the error message is
> new, and it's
> always been broken? ;-) )...
>
> as subj says linux-3.0.0, stock vanilla + the latest IMQ networkfilter
> patch.
> X64
>
> [ 13.722612] ACPI Error: SMBus or IPMI write requires Buffer of length 66,
> found length 32 (20110413/exfield-285)
> [ 13.733078] ACPI Error: Method parse/execution failed [\_SB_.PMI0._GHL]
> (Node ffff880616962b18), AE_AML_BUFFER_LIMIT (20110413/psparse-536)
> [ 13.746189] ACPI Error: Method parse/execution failed [\_SB_.PMI0._PMC]
> (Node ffff880616962a78), AE_AML_BUFFER_LIMIT
> [ 13.755322] dca service started, version 1.12.1[ 13.761822]
> (20110413/psparse-536)
> [ 13.765509] ACPI Exception: AE_AML_BUFFER_LIMIT, Evaluating _PMC
> (20110413/power_meter-773)
For completeness, it'd be nice to see the complete dmesg log. In this
case, it looks AML-related, so an acpidump would also be useful.
Bjorn
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: ACPI ERROR SMBus or IPMI write requires Buff of len 66, found 32...???? linux-3.0.0
2011-11-01 14:05 ` Bjorn Helgaas
@ 2011-11-01 14:43 ` Matthew Garrett
0 siblings, 0 replies; 3+ messages in thread
From: Matthew Garrett @ 2011-11-01 14:43 UTC (permalink / raw)
To: Bjorn Helgaas; +Cc: Linda Walsh, LKML, linux-acpi
On Tue, Nov 01, 2011 at 08:05:49AM -0600, Bjorn Helgaas wrote:
> [+cc linux-acpi]
>
> On Mon, Oct 31, 2011 at 3:16 PM, Linda Walsh <lkml@tlinx.org> wrote:
> >
> >
> > Was looking through boot log messages, and this one seemed 'new'...
>
> Can you confirm that this error did not occur on a previous version?
> What is the most recent version where it did not occur?
ACPI IPMI support was only added recently, so it's not surprising that
it didn't show up previously. The spec is quite clear that IPMI message
buffers should be 66 bytes, but a lot of firmware seems to disagree. Not
sure what the best thing to do here is.
--
Matthew Garrett | mjg59@srcf.ucam.org
^ permalink raw reply [flat|nested] 3+ messages in thread
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2011-10-31 21:16 ACPI ERROR SMBus or IPMI write requires Buff of len 66, found 32...???? linux-3.0.0 Linda Walsh
2011-11-01 14:05 ` Bjorn Helgaas
2011-11-01 14:43 ` Matthew Garrett
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