From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 70651] cannot write to power_dpm_force_performance_level:
invalid argument (radeon 7730m)
Date: Mon, 24 Feb 2014 15:21:10 +0000
Message-ID:
References:
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Return-path:
Received: from mail.kernel.org (mail.kernel.org [198.145.19.201])
by gabe.freedesktop.org (Postfix) with ESMTP id AF120FAAE9
for ;
Mon, 24 Feb 2014 07:21:14 -0800 (PST)
Received: from mail.kernel.org (localhost [127.0.0.1])
by mail.kernel.org (Postfix) with ESMTP id EBC8E20160
for ;
Mon, 24 Feb 2014 15:21:13 +0000 (UTC)
Received: from bugzilla1.web.kernel.org (bugzilla1.web.kernel.org
[172.20.200.51])
by mail.kernel.org (Postfix) with ESMTP id 00DF32017E
for ;
Mon, 24 Feb 2014 15:21:10 +0000 (UTC)
In-Reply-To:
List-Unsubscribe: ,
List-Archive:
List-Post:
List-Help:
List-Subscribe: ,
Sender: dri-devel-bounces@lists.freedesktop.org
Errors-To: 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=70651
--- Comment #7 from Alex Deucher ---
That patch is against 3.14rc; it should apply there. The issue is that on
hybrid laptops, the dGPU is powered down when not in use so you can't make
adjustments to the dGPU when it's powered down. It doesn't make sense to power
it up to make the adjustments since it will just be powered down again right
after. As such the values you are reading back are garbage since the hw is
powered down. The patch just attempts to do something sensible when you try
and access the hw via sysfs or debugfs and the dGPU is powered down. You can
disable the automatic dGPU power down by setting radeon.runpm=0 on the kernel
command line in grub.
--
You are receiving this mail because:
You are watching the assignee of the bug.