Re: Acer Aspire 1690 Suspend/Hibernate Report with 2.6.29-rc3

[Pavel Machek <pavel@ucw.cz>]

On Tue 2009-02-10 15:24:48, Rafael J. Wysocki wrote:
> On Tuesday 10 February 2009, Pavel Machek wrote:
> > > Hi!
> > >  
> > > > > > > Just a FYI, with my Acer Aspire 1690 using 2.6.29-rc3
> > > > > > > suspend/hibernate behave in this manner:
> > > > > > > 
> > > > > > > Hibernation completes ok but resumes immediately as if
> > > > > > > I would have pressed the power button.
> > > > > 
> > > > > Thanks a lot for the tip, indeed it makes hibernation
> > > > > working again:
> > > > > 
> > > > > root@localhost:~# echo shutdown > /sys/power/disk
> > > > > root@localhost:~# pm-hibernate
> > > > > 
> > > > > Great! Is there a way to make this default on my
> > > > > system, e.g., with a quirk?
> > > > 
> > > > Well, it would be better to fix it properly, than just work
> > > > around it with quirk. I think it worked before and you already
> > > > identified commit that breaks it?
> > > 
> > > Yes, we found out it with Rafael last month:
> > > 
> > > https://lists.linux-foundation.org/pipermail/linux-pm/2009-January/019225.html
> > > https://lists.linux-foundation.org/pipermail/linux-pm/2009-January/019244.html
> > > https://lists.linux-foundation.org/pipermail/linux-pm/2009-January/019251.html
> > 
> > Hmm, hibernation rework broke that, and looks USB related. Maybe it is
> > fixed in latest kernel (-rc4), as there were USB-keeps-systems-awake
> > fixes.
> 
> AFAICS, it is a chipset/BIOS problem.
> 
> As long as we were using shutdown to turn off the box during hibernation,
> things worked on these boxes.  As soon as we started using the ACPI "enter S4"
> feature, it stopped and ehci-hcd always happens to be the culprit (I had access
> to one box with this issue, but unfortunately I don't have it any more).
> 
> The only thing we can really do here is to blacklist all of the boxes with this
> problem and handle them in a special way.

Well, if unloading uhci/ohci/ehci helps, there should be a better
solution than a blacklist. But...
									Pavel
-- 
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