linux-kernel - Re: broken suspend to ram with velocity driver

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20080227130819.GA28528@srcf.ucam.org>
Date:	Wed, 27 Feb 2008 13:08:20 +0000
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Kevin Winchester <kjwinchester@...il.com>
Cc:	Pavel Machek <pavel@....cz>, "Rafael J. Wysocki" <rjw@...k.pl>,
	LKML <linux-kernel@...r.kernel.org>, len.brown@...el.com,
	linux-pm@...ts.linux-foundation.org
Subject: Re: broken suspend to ram with velocity driver

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@...f.ucam.org
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/