linux-kernel - Re: [patch] KVM: T60 resume fix

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Message-ID: <20070305132625.GA5311@mellanox.co.il>
Date:	Mon, 5 Mar 2007 15:26:25 +0200
From:	"Michael S. Tsirkin" <mst@...lanox.co.il>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Avi Kivity <avi@...ranet.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Jens Axboe <jens.axboe@...cle.com>,
	Pavel Machek <pavel@....cz>, Adrian Bunk <bunk@...sta.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>, linux-pm@...ts.osdl.org,
	Michal Piotrowski <michal.k.k.piotrowski@...il.com>,
	Daniel Walker <dwalker@...sta.com>, Len Brown <lenb@...nel.org>
Subject: Re: [patch] KVM: T60 resume fix

> Quoting Ingo Molnar <mingo@...e.hu>:
> Subject: Re: [patch] KVM: T60 resume fix
> 
> 
> * Michael S. Tsirkin <mst@...lanox.co.il> wrote:
> 
> > > suspend/resume works fine now and there are no warning messages 
> > > whatsoever (with suspend simulation). Thanks Avi!
> > 
> > I just tried Ingo's .config and it hangs on resume for me (with 
> > suspend to memory).
> 
> could you try 's2ram' from http://suspend.sf.net ? It's basically 
> equivalent to 'echo mem > /sys/power/state', but you can usually also 
> see the reason why it doesnt resume, on the vga console. (by default the 
> kernel doesnt resume the t60's vga properly)

OK, I'll give it a try. Do I have to shut down X or is it enough to
switch to another VT?

> on my box resume works, but it's incredibly slow.

I guess it is possible that what I mistook for a hang was actually an incredibly
slow system, and that it would resume, eventually. I waited for 5 min and gave
up.

> Takes a few minutes to have total effect.

I have same here with my old .config (2-3 min).

However, after resume was completed, system would hang on the *next* suspend to
ram.

Ingo, do you see this behaviour, or can you suspend/resume any number of times?

-- 
MST
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