linux-kernel - Re: suspend slow in 2.6.25-rc6 (was Re: Suspend and hibernation patchset against -rc6)

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Message-ID: <20080319114851.GB21270@atrey.karlin.mff.cuni.cz>
Date:	Wed, 19 Mar 2008 12:48:51 +0100
From:	Pavel Machek <pavel@....cz>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Alan Stern <stern@...land.harvard.edu>,
	David Brownell <david-b@...bell.net>, Greg KH <greg@...ah.com>,
	Len Brown <lenb@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Shaohua Li <shaohua.li@...el.com>,
	Alexey Starikovskiy <astarikovskiy@...e.de>,
	Johannes Berg <johannes@...solutions.net>
Subject: Re: suspend slow in 2.6.25-rc6 (was Re: Suspend and hibernation patchset against -rc6)

Hi!

> > commit 7c0ea45be4f114d85ee35caeead8e1660699c46f
> > 
> >     ACPI: Ignore _BQC object when registering backlight device
> > 
> > when did this go in? Pretty recently, right?
> 
> Yes:
> 
> 	[torvalds@...dy linux]$ git describe 7c0ea45be4f114d85ee35caeead8e1660699c46f
> 	v2.6.25-rc5-89-g7c0ea45
> 
> so it happened after -rc5.
> 
> > And that means that ACPI backlight driver is now used on machines where 
> > it was not used before...?
> 
> Somebody more into ACPI needs to judge how likely this is to be an issue..

Ok, 7c0... is innocent. Reverting not only the mdelay, but also rest
of drivers/acpi/ec.c patch fixed the
"rc6-breaks-backlight-in-X-over-lid-close", good.
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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