linux-kernel - Re: 3.15-rc: regression in suspend

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Message-ID: <alpine.LRH.2.00.1405141435510.30793@twin.jikos.cz>
Date:	Wed, 14 May 2014 14:39:19 +0200 (CEST)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Pavel Machek <pavel@....cz>
cc:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Linux-pm mailing list <linux-pm@...ts.osdl.org>,
	kernel list <linux-kernel@...r.kernel.org>
Subject: Re: 3.15-rc: regression in suspend

On Tue, 13 May 2014, Pavel Machek wrote:

> > > There seems to be regression in 3.15 w.r.t. suspend to ram and suspend
> > > to disk.
> > > 
> > > Resume sometiems works, but often, system is half-usable, with "what
> > > do you want to do suspend/hibernate" dialog staying on screen.
> > > 
> > > I did echo disk > /sys/power/state, and echo never returned to the
> > > shell prompt. (X was not really working, either.)
> > > 
> > > It is still there on 3.15.0-rc3+. I'll update to rc5 now.
> > 
> > 3.15.0-rc5+ seems to behave a bit better. Lets see if it reappears.
> 
> It did. 

So it might in the end of the day the same thing as I have reported in 

	https://bugs.freedesktop.org/show_bug.cgi?id=76554

which is not 100% reproducible either (although with newer kernels it's 
*much* more reproducible for me than with older).

> It worked few times on -rc5, but then I rebooted and problem 
> re-appeared.

If you could capture dmesg of the resume where X fails to resume properly 
to see whether you have i915 ring initialization errors there as well?

-- 
Jiri Kosina
SUSE Labs

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