linux-kernel - Re: Suspend to RAM fault in VT when resuming

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Message-ID: <20070313212457.GD12370@elf.ucw.cz>
Date:	Tue, 13 Mar 2007 22:24:57 +0100
From:	Pavel Machek <pavel@....cz>
To:	Tim Gardner <tim.gardner@...onical.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Suspend to RAM fault in VT when resuming

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


-- 
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