linux-kernel - Re: [PATCH 0/4] PM: Do not destroy/create devices while suspended (rev. 2)

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Date:	Thu, 3 Jan 2008 11:56:15 +0100
From:	Pavel Machek <pavel@....cz>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Ingo Molnar <mingo@...e.hu>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Alan Stern <stern@...land.harvard.edu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Len Brown <lenb@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>, Greg KH <gregkh@...e.de>,
	David Brownell <david-b@...bell.net>
Subject: Re: [PATCH 0/4] PM: Do not destroy/create devices while suspended
	(rev. 2)

Hi!

> > > > That way any suspend breakage would be detectable (and bisectable) 
> > > > in automated testing - if the resume does not come back after 10-20 
> > > > seconds then the test failed.
> > > 
> > > Yes, but please note that some systems require user space 
> > > manipulations of the graphics adapter for suspend to work and to 
> > > detect a breakage of such a system you need to boot it into X and use 
> > > s2ram to suspend.
> > 
> > yeah, i wouldnt expect graphics mode to come back without quirks. But it 
> > should still work fine over the network, right? (which is my main mode 
> > of testing anyway)
> 
> Well, if the graphics is sufficiently broken, it won't resume at
> all.

Actually, no. Unless you try to boot the bios, it should come up
without graphics. 

Hmm... first framebuffer access may kill the machine at that
point... so disable framebuffer...? ;-). 

vga=1 and no acpi_sleep options usually does the trick for me. That
should work everywhere, independend of graphics options, AFAICT.
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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