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

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Message-ID: <20070316162117.GA3951@ucw.cz>
Date:	Fri, 16 Mar 2007 16:21:17 +0000
From:	Pavel Machek <pavel@....cz>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	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

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.
> 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.
> 
> 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.

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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