From mboxrd@z Thu Jan  1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 74551] Unable to run linux with radeon.runpm=1
Date: Fri, 18 Jul 2014 05:36:50 +0000
Message-ID: <bug-74551-2300-8wMWI0ugQK@https.bugzilla.kernel.org/>
References: <bug-74551-2300@https.bugzilla.kernel.org/>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Return-path: <dri-devel-bounces@lists.freedesktop.org>
Received: from mail.kernel.org (mail.kernel.org [198.145.19.201])
 by gabe.freedesktop.org (Postfix) with ESMTP id BAD476E2AA
 for <dri-devel@lists.freedesktop.org>; Thu, 17 Jul 2014 22:36:52 -0700 (PDT)
Received: from mail.kernel.org (localhost [127.0.0.1])
 by mail.kernel.org (Postfix) with ESMTP id D105D2017A
 for <dri-devel@lists.freedesktop.org>; Fri, 18 Jul 2014 05:36:51 +0000 (UTC)
Received: from bugzilla1.web.kernel.org (bugzilla1.web.kernel.org
 [172.20.200.51])
 by mail.kernel.org (Postfix) with ESMTP id 6A9D12018E
 for <dri-devel@lists.freedesktop.org>; Fri, 18 Jul 2014 05:36:50 +0000 (UTC)
In-Reply-To: <bug-74551-2300@https.bugzilla.kernel.org/>
List-Unsubscribe: <http://lists.freedesktop.org/mailman/options/dri-devel>,
 <mailto:dri-devel-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <http://lists.freedesktop.org/archives/dri-devel>
List-Post: <mailto:dri-devel@lists.freedesktop.org>
List-Help: <mailto:dri-devel-request@lists.freedesktop.org?subject=help>
List-Subscribe: <http://lists.freedesktop.org/mailman/listinfo/dri-devel>,
 <mailto:dri-devel-request@lists.freedesktop.org?subject=subscribe>
Errors-To: dri-devel-bounces@lists.freedesktop.org
Sender: "dri-devel" <dri-devel-bounces@lists.freedesktop.org>
To: dri-devel@lists.freedesktop.org
List-Id: dri-devel@lists.freedesktop.org

https://bugzilla.kernel.org/show_bug.cgi?id=74551

--- Comment #16 from maxis11 <ya.maxis11@yandex.ru> ---
(In reply to Alex Deucher from comment #15)
> (In reply to maxis11 from comment #13)
> > (In reply to Alex Deucher from comment #12)
> > > (In reply to maxis11 from comment #6)
> > > > BTW runpm works with 3.12.7 and 3.12.8 (with 3.13 and later runpm=1 freezes
> > > > laptop during boot)
> > > 
> > > runpm support didn't exist until 3.13. If "echo OFF >
> > > /sys/kernel/debug/vgaswitcheroo/switch" has never worked, then your system
> > > has never had functional support for turning on/off the dGPU.
> > 
> > kernel 3.12.7:
> > When loading SUMO2(6480g)
> 
> That's not runpm, that's dpm (dynamic power management).  Runpm turns the
> dGPU off completely when it's not in use.  Dpm dynamically adjusts the
> clocks and voltages of the GPU when it's powered on.  Prior to 3.13, runpm
> was not available and the dGPU was always powered on unless you manually
> powered it off via debugfs.

So it seems that this is Acer BIOS problem freezes laptop, when trying to turn
off dGPU. Am I right?

-- 
You are receiving this mail because:
You are watching the assignee of the bug.