From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 67121] Broken suspend/resume with radeon/KMS on RS482M
Date: Fri, 17 Jan 2014 23:39:10 +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 23EC3FC1D9
for ;
Fri, 17 Jan 2014 15:39:15 -0800 (PST)
Received: from mail.kernel.org (localhost [127.0.0.1])
by mail.kernel.org (Postfix) with ESMTP id 6C27220165
for ;
Fri, 17 Jan 2014 23:39:13 +0000 (UTC)
Received: from bugzilla2.web.kernel.org (bugzilla2.web.kernel.org
[172.20.200.52])
by mail.kernel.org (Postfix) with ESMTP id BAC6B2017B
for ;
Fri, 17 Jan 2014 23:39:10 +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=67121
--- Comment #7 from Adrian Knoth ---
Random observation: high CPU usage "uncripples" the video output.
That is: I suspend to RAM, I resume and unplug the AC, causing the screen to be
heavily distorted.
When I blindly start burnK7 (from Debian's cpuburn package), CPU usage on one
of the cores jumps to 100% and I have a wonderful clear and perfect screen. As
soon as I terminate burnK7, the corruption is back. (with AC unplugged all the
time; of course, plugging the AC back in always fixes the corruption).
So it's a power management issue. For some reasons, the radeon driver (or the
hardware) is sensitive to CPU power saving states (idle states?) and the
presence of an external power supply. And all this only happens with KMS, not
with UMS.
So is it an ACPI/PM bug? Or DRI?
--
You are receiving this mail because:
You are watching the assignee of the bug.