Subject: Re: Suspend to RAM broken with 2.6.13
From: Jean-Marc Valin <Jean-Marc.Valin@USherbrooke.ca>
To: Pavel Machek <pavel@ucw.cz>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
In-Reply-To: <20050923163200.GC8946@openzaurus.ucw.cz>
References: <1127347633.25357.49.camel@idefix.homelinux.org>
	 <20050923163200.GC8946@openzaurus.ucw.cz>
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Date: Sat, 24 Sep 2005 21:12:41 +1000
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Hi,

> > I'm experiencing problems with suspend to RAM on my Dell D600 laptop.
> > When I run Ubuntu's 2.6.10 kernel I have no problem with suspend to RAM.
> > However, when I run 2.6.13, my laptop sometimes doesn't wake up. It
> > seems like the longer my uptime, the more likely the problem is to occur
> > (which makes it hard to reproduce sometimes). This happens even with a
> > non-preempt kernel.
> 
> Check if it works with minimal drivers and non-preemptible kernel...

I checked with 1) a minimal drivers on a preempt kernel and 2) with a
few more drivers (usb mouse) and a non-preempt kernel. Both didn't wake
up when I suspended after a few days of uptime (right after boot, it's
fine). The default Ubuntu kernel is a preempt-enabled 2.6.10 kernel and
it always resumed from suspend, even with usb devices plugged in (I
still had to reload the driver though). As I said, it's not trivial to
test, because it takes a while before the bug occurs.

	Jean-Marc

-- 
Jean-Marc Valin <Jean-Marc.Valin@USherbrooke.ca>
Universit? de Sherbrooke
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