linux-kernel - Re: Linux 3.11-rc2

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Date:	Tue, 23 Jul 2013 23:49:29 +0100
From:	Steven Newbury <steve@...wbury.org.uk>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Matthew Garrett <matthew.garrett@...ula.com>,
	James Hogan <james@...anarts.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kamal Mostafa <kamal@...onical.com>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>
Subject: Re: Linux 3.11-rc2

On Tue, 2013-07-23 at 23:24 +0200, Rafael J. Wysocki wrote:
> On Tuesday, July 23, 2013 06:47:55 PM Steven Newbury wrote:
> > On Mon, 2013-07-22 at 21:56 +0200, Rafael J. Wysocki wrote:
> > > On Monday, July 22, 2013 06:16:20 PM Matthew Garrett wrote:
> > > > On Mon, 2013-07-22 at 15:02 +0200, Rafael J. Wysocki wrote:
> > > > 
> > > > > In the meantime I received a report from Steven Newbury that these changes
> > > > > broke things for him too, so we need to revert commits 8c5bd7a and efaa14c.
> > > > > The other two commits in the series should be benign.
> > > > 
> > > > Could you let me know the details of this problem?
> > > 
> > > Steven, can you please describe the problem you're seeing to Matthew and
> > > the other people on the list?
> > > 
> > > Rafael
> > > 
> > 
> > Before the changes backlight was working fine using the ACPI method: 
> > /sys/class/backlight/acpi_video0/ is present and the keyboard function keys
> > control brightness with notifications working in GNOME.
> > 
> > In the code as was present in the linux-pm/bleeding-edge tree I would
> > encounter a hard lockup on keyboard brightness trigger.  This also occurred with
> > the code as it initially hit mainline, but a later commit fixed the crash*, but
> > resulted in no backlight controls being available at all.
> > /sys/class/backlight  is empty.
> > 
> > *not actually sure if /sys/class/backlight contained anything before this
> 
> Hmm.  Which commit fixed the crash for you?
> 
> Rafael
> 

I'll see if I can build a broken kernel tomorrow, after backing up! ;-)

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