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List:       opensolaris-laptop-discuss
Subject:    Re: [laptop-discuss] Suspend/Resume Dell Latitude E6500 (snv_129)
From:       Randy Fishel <randy.fishel () sun ! com>
Date:       2010-01-01 20:25:21
Message-ID: alpine.GSO.1.10.1001011219310.767 () grimmy
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On Thu, 31 Dec 2009, Jürgen Keil wrote:

> > On Mon, 2009-12-28 at 18:55 -0800, Michel Belleau
> > wrote:
> > > I'm trying to enable Suspend/Resume on my Dell Latitude E6500 using Opensolaris.
> > > Suspend seems to work great, but system unfortunately does not resume.
> > > 
> > > Anyone having hints for me? Thanks in advance.
> > 
> > I've seen similar behavior on a Toshiba R500 and recently found a pair
> > of possible workarounds relating to interaction between resume and the
> > clock subsystem.  The workaround is to largely platform-independent code
> > so it may well affect many systems.
> 
> I also had problems with the clock subsystem resume on a Tecra S1
> laptop (an uppc system), and my fix is to run a custom kernel that
> resumes the tsc clock code before the cyclic subsystem is resumed.

  Technically, the resume occurs before cyclic, but the suggestion in 
the thread below has it done even earlier, so that there is a lessor 
chance of time-related (or particularly tsc-related) issues/races 
getting in the way.  The tickless implementation might help even more.

	---- Randy

> 
> 
> Link to the old thread (including a patch with the fix that I'm using):
> 
>     http://opensolaris.org/jive/thread.jspa?messageID=294397
> -- 
> This message posted from opensolaris.org
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> 

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