Re: [PATCH] x86/ACPI: Make Sony Vaio Z1 series to use "reboot=pci" default

[Adam Williamson <awilliam@redhat.com>]

On Fri, 2013-10-25 at 18:27 -0700, Adam Williamson wrote:
> On Fri, 2013-10-25 at 18:16 +0100, Linus Torvalds wrote:
> > On Fri, Oct 25, 2013 at 5:47 PM, Adam Williamson <awilliam@redhat.com> wrote:
> > >
> > > I don't, but one comment I could add is that reboot _used_ to work okay
> > > on the Z1. And I _think_ it's worked OK since the April 2011 commit you
> > > mention (so the introduction of that didn't break it), but I can't
> > > absolutely swear to it.
> > 
> > It might be interesting to try, and if it used to work with the acpi
> > method, use bisection to see when it stopped working..
> 
> So I might have trouble bisecting, as stone-age kernels don't seem to
> boot on my installed system cleanly any more; some kind of
> incompatibility with my encrypted partitions. But I booted an F16 live
> image, which has kernel 3.1.0, and that reboots quickly. If I'm reading
> things correctly, mjg59's patch went into kernel 2.6.39, so if that was
> causing the problem, I'd expect the F16 live image to have a slow
> reboot.
> 
> I'll go back through the live images for F17->F19 and see when the
> reboot gets slow, which will give us a very rough range to look at, at
> least. I'll also try Rafael's suggestion re acpi_osi.

OK, so, findings: F16 and F17 live images reboot quickly. F18 is the
first that reboots slowly. That gives us a range of
kernel-3.3.4-5.fc17.x86_64.rpm  (the F17 release kernel - last known
good) to kernel-3.6.10-4.fc18.x86_64.rpm (the F18 release kernel - first
known bad). I'll try and see if I can find a way to narrow the range
any. Well, one report on the vaio-z mailing list -
https://lists.launchpad.net/sony-vaio-z-series/msg02868.html - indicates
the problem existed in Ubuntu kernel 3.5.0-17-generic , so that'd be a
range of 3.3.4 to 3.5.0 for the breakage.

acpi_osi="!Windows 2012" as a kernel parameter on a 3.12-rc6 kernel does
not result in a fast reboot, it's no help.
-- 
Adam Williamson
Fedora QA Community Monkey
IRC: adamw | Twitter: AdamW_Fedora | XMPP: adamw AT happyassassin . net
http://www.happyassassin.net