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From: Pavel Machek <pavel@ucw.cz>
To: Tim Gardner <tim.gardner@canonical.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Suspend to RAM fault in VT when resuming
Date: Tue, 13 Mar 2007 22:24:57 +0100	[thread overview]
Message-ID: <20070313212457.GD12370@elf.ucw.cz> (raw)
In-Reply-To: <45F709F2.80504@canonical.com>

Hi1

> I've chased one of the 'Suspend to RAM' resume problems to a specific
> line in drivers/char/vt.c, see attached 2.6.21-rc3 diff with

Has suspend/resume ever worked on that hardware?

> TRACE_RESUME() instrumentation. The macro scr_writew resolves to '*addr
> = val', which appears to be causing the problem. I've verified that the
> pointer is not NULL, but don't know if its really valid. Its pretty
> tough to tell what is happening, but on a Dell XPS it just hangs. A Dell
> Precision blinks the keyboard lights.

It is possible that video is not initialized at that point, and that
hardware goes seriously unhappy when you access non-existing vga. Does
it resume ok when you completely disable video support? 


								Pavel


-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

  reply	other threads:[~2007-03-13 21:25 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-03-13 20:30 Tim Gardner
2007-03-13 21:24 ` Pavel Machek [this message]
2007-03-14  1:42   ` Tim Gardner
2007-03-19 15:07     ` Pavel Machek
2007-03-19 16:15       ` Tim Gardner
2007-03-19 20:45         ` Pavel Machek

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