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

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Message-ID: <47E178FE.6050500@suse.de>
Date:	Wed, 19 Mar 2008 23:35:10 +0300
From:	Alexey Starikovskiy <astarikovskiy@...e.de>
To:	Pavel Machek <pavel@....cz>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	"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>,
	Johannes Berg <johannes@...solutions.net>
Subject: Re: suspend slow in 2.6.25-rc6 (was Re: Suspend and hibernation	patchset
 against -rc6)

Pavel Machek wrote:
> Hi!
> 
>>> 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.
>> Can you clarify a bit?
>>
>> Do you mean that the full revert of 2c81ce4 that already got committed is 
>> sufficient for you, or do you need to totally undo everything we've done 
>> to ec.c since -rc5, and thus also to revert the _other_ revert we did (in 
>> 4af8e10a6c57e7292862bd1703712f0565c7e429)?
> 
> I did some more testing, and realized I was wrong. We need to totally
> undo everything we've done to ec.c since -rc5... (that has small
> sideffect of brightness up/down keys no longer working -- regression
> since 2.6.24, but saves us from "backlight gone after
> closing/reopening lid" which is _NASTY_ regression from 2.6.25-rc5).
> 
> ACPI sucks.
> 
> I.e. this patch:
> 
> 
> Revert ec.c to 2.6.25-rc5 state:
> 
> * this fixes backlight after closing/reopening the lid while in X on
> thinkpad x60
> 
> * unfortunately it breaks fn-home/end keyboard brightness control
It should also break volume up/down/mute keys. Essentially all the keys on Thinkpad.
And it would also be regression to 2.6.24 level.

Regards,
Alex.
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