linux-kernel - Re: 2.6.21rc suspend to ram regression on Lenovo X60

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Date:	Fri, 16 Mar 2007 11:37:39 -0700
From:	"Kok, Auke" <auke-jan.h.kok@...el.com>
To:	Pavel Machek <pavel@....cz>
CC:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Dave Jones <davej@...hat.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: Re: 2.6.21rc suspend to ram regression on Lenovo X60

Pavel Machek wrote:
> Hi!
> 
>>> Seeing a couple of MSI changes in there, on a hunch I booted latest tree with
>>> pci=nomsi, and it resumed again.
>>>
>>> Any ideas how to further debug this?
>>> I'll try backing out individual changes from that merge tomorrow.
>> Thanks.  
>>
>> Of those msi patches you have identified I don't see anything really
>> obvious.  And you actually marked them as good in your bisect so
>> I don't expect it is core problem.
>>
>> We do have a known e1000 regression, with msi and suspend/resume.

still? I tested this against rc3 and it's mostly just fine. even with msi enabled.

>> So it is possible the nomsi avoided a driver problem.  Especially
>> as we have a number of driver changes on the on Linus's side of
>> that merge.
>>
>> I also know we have some known issues with pci_save_state and
>> pci_restore_state that require them to be paired for correct
>> operation.  For suspend and resume that is not generally a problem.
>>
>> I have fixes for the pci_save_state and pci_restore_state in the -mm
>> and gregkh tree's.  Since they also happen to fix the e1000 driver as
>> a side effect they are worth looking at, at least if you have an
>> e1000.

hey, please include me on those!

>> I don't have a clue which hardware the x60 has so I don't know which
>> drivers it would be using.
> 
> x60 indeed has e1000.

yup.

Auke
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