linux-kernel - Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot after cold boots, boots after reboot

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Message-ID: <20170215172303.GA15696@amd>
Date:   Wed, 15 Feb 2017 18:23:03 +0100
From:   Pavel Machek <pavel@....cz>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-pci@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alan Stern <stern@...land.harvard.edu>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        USB list <linux-usb@...r.kernel.org>
Subject: Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot
 after cold boots, boots after reboot

On Tue 2017-02-14 11:12:26, Linus Torvalds wrote:
> On Feb 14, 2017 9:59 AM, "Pavel Machek" <pavel@....cz> wrote:
> 
> Hi!
> 
> > >
> > > Booting to grub, then hitting ctrl-alt-del is enough to make it work.
> Ouch.
> > >
> > > It happens with current Linus' tree.
> >
> > v4.10-rc6-feb3 : broken
> > v4.9 : ok
> 
> I wonder if you could bisect it now that you've figured out the rules for
> when it breaks...

I guess that's what I'll need to do. It is my main machine, so it is a
bit painful.

Anyway, it seems that "nosmp" makes it hang at similar place, but
makes it hang reliably, reboot or cold poweroff. So I guess that's
what I'll use for bisection -- should be possible to do automatically
that way.

> I don't think I've seen any similar reports, so we don't have a lot of
> clues to go by otherwise, I think.

:-(.
								Pavel

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

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