linux-kernel - Re: 2.6.19-rc5: grub is much slower resuming from suspend-to-disk than in 2.6.18

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Date:	Mon, 13 Nov 2006 06:42:15 +0300
From:	Andrey Borzenkov <arvidjaar@...l.ru>
To:	Pavel Machek <pavel@....cz>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: 2.6.19-rc5: grub is much slower resuming from suspend-to-disk than in 2.6.18

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On Sunday 12 November 2006 17:55, Pavel Machek wrote:
> On Sun 12-11-06 14:36:41, Andrey Borzenkov wrote:
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> > This is rather funny; in 2.6.19-rc5 grub is *really* slow loading kernel
> > when I switch on the system after suspend to disk. Actually, after kernel
> > has been loaded, the whole resuming (up to the point I have usable
> > desktop again) takes about three time less than the process of loading
> > kernel + initrd. During loading disk LED is constantly lit. This almost
> > looks like kernel leaves HDD in some strange state, although I always
> > assumed HDD/IDE is completely reinitialized in this case.
>
> Seems like broken hw, really. No state should survive machine
> poweroff.
>

Well, we do have NVRAM do not we?

> Is it notebook?
>

Yes.

> Can you try to unplug system for a few minutes / unplug battery if
> notebook to see if it helps?

No. I unplugged power, removed battery and left it over night. Today morning 
it has shown exactly the same behavior upon resuming (well, upon power-on 
after suspend to disk :))

To recap - this never happens upon simple power off; I do not remember this to 
happen upon suspend to disk until 2.6.19 (I won't claim it never happened, 
just that I do not remember it). This happens consistently in 2.6.19-rc5. I 
am very curious which hardware issue may have such pattern. And in any case 
this does smell like regression (earlier version not triggering this HW issue 
if any)

- -andrey
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