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From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Kevin Winchester <kjwinchester@gmail.com>
Cc: Pavel Machek <pavel@ucw.cz>, "Rafael J. Wysocki" <rjw@sisk.pl>,
	LKML <linux-kernel@vger.kernel.org>,
	len.brown@intel.com, linux-pm@lists.linux-foundation.org
Subject: Re: broken suspend to ram with velocity driver
Date: Wed, 27 Feb 2008 13:08:20 +0000	[thread overview]
Message-ID: <20080227130819.GA28528@srcf.ucam.org> (raw)
In-Reply-To: <47C4AEB7.1030404@gmail.com>

On Tue, Feb 26, 2008 at 08:28:39PM -0400, Kevin Winchester wrote:
> I haven't done too much looking at what the tool on that site does,
> but I was under the impression that I should be able to do:
> 
> echo mem > /sys/power/state
> 
> and then bring the system back up and have it work.  

Not if you want video to come back on most hardware - the kernel has no 
idea how to reinitialise your graphics card. s2ram and similar tools 
attempt to deal with this by reprogramming it from userspace. On the 
other hand, if it did work on the same hardware with earlier kernels, 
then that's a bug.

-- 
Matthew Garrett | mjg59@srcf.ucam.org

  parent reply	other threads:[~2008-02-27 13:08 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-24  5:23 linux-next: Tree for Feb 24 Stephen Rothwell
2008-02-24 18:19 ` Kevin Winchester
2008-02-24 20:00   ` Rafael J. Wysocki
2008-02-24 23:35     ` Kevin Winchester
2008-02-24 23:43       ` Rafael J. Wysocki
2008-02-25  0:23         ` Kevin Winchester
2008-02-25  9:26       ` Pavel Machek
2008-02-26  0:24         ` broken suspend to ram with velocity driver Kevin Winchester
2008-02-26  0:49           ` Rafael J. Wysocki
2008-02-27  0:36             ` Kevin Winchester
2008-02-27 12:59               ` Rafael J. Wysocki
2008-02-27  0:48             ` Kevin Winchester
2008-02-27 13:00               ` Rafael J. Wysocki
2008-02-26 21:49           ` Pavel Machek
2008-02-27  0:28             ` Kevin Winchester
2008-02-27 13:06               ` Rafael J. Wysocki
2008-02-27 13:08               ` Matthew Garrett [this message]
2008-02-25 21:56 ` linux-next: Tree for Feb 24 Geert Uytterhoeven
2008-02-25 22:30   ` Randy Dunlap
2008-02-25 23:49   ` Stephen Rothwell
2008-02-26  7:55     ` Geert Uytterhoeven

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