linux-kernel - Re: Regression introduced in v3.2.12 stable

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Message-ID: <20120322215223.GA18689@kroah.com>
Date:	Thu, 22 Mar 2012 14:52:23 -0700
From:	Greg KH <greg@...ah.com>
To:	Joseph Salisbury <joseph.salisbury@...onical.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Regression introduced in v3.2.12 stable

On Thu, Mar 22, 2012 at 05:43:42PM -0400, Joseph Salisbury wrote:
> On 03/22/2012 05:26 PM, Greg KH wrote:
> > On Thu, Mar 22, 2012 at 03:15:03PM -0400, Joseph Salisbury wrote:
> >> I figured I'd send a heads up regarding a possible regression in v3.2.12
> >> stable.  The issue prevents systems from booting.
> >>
> >> There have been a few bugs[0] reported against the Ubuntu kernel, which
> >> was recently rebased to 3.2.12.  We're in the process of bisecting now
> >> and will post an update..
> > 
> > What specifically happens here when the system does not boot?  Any error
> > message?  Are you sure this isn't the known pci express issue showing up
> > here?
> > 
> > Can you run 'git bisect' to trace it down to a specific patch please?
> > 
> > thanks,
> > 
> > greg k-h
> 
> Hi Greg,
> 
> Thanks for the response.
> 
> We did some bisecting/testing and identified the bad commit in 3.2.12 as
> the following:
> 
> f043ddb60c84ea64a23b755004572afe922e653c PCI: ignore pre-1.1 ASPM
> quirking when ASPM is disabled

Yup, that's the known problem one.  But, note that it does solve other
people's problems at the moment, so you can't just ignore it :)

greg k-h
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